JP2737169B2 - Automatic accompaniment device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic accompaniment apparatus for an electronic musical instrument, and more particularly, to an automatic accompaniment apparatus for performing a bass chord accompaniment by designating a chord progression.

[Conventional technology]

With the spread of electronic musical instruments such as electronic keyboards, electronic wind instruments, and electronic stringed instruments, it has become possible to easily enjoy playing with various types of musical sounds, and one electronic musical instrument can produce many types of musical sounds. It is becoming easier to obtain.

Further, many electronic musical instruments equipped with an automatic accompaniment device have been developed in order to obtain a variety of performance effects with a simple operation.

In this case, the automatic accompaniment is performed in such a manner that the automatic accompaniment is performed using a rhythm instrument sound, a bass and a chord (chord)
Some perform automatic accompaniment by accompaniment, and these enhance musical expressiveness.

Here, in an automatic accompaniment apparatus that performs automatic accompaniment by bass chord accompaniment, the timing for generating a chord sound is, for example, a pattern in which 16 steps (corresponding to a sixteenth note) are set as one set (hereinafter, this is referred to as a chord pattern). Call). That is, it is specified whether or not to generate a chord sound at each step, and the 16-step chord pattern is sequentially read out at a fixed tempo, and while determining and controlling whether or not to sound at each step, the chord sound is generated. If the sounding timing is controlled and played while repeatedly reading out the above 16 steps, a musically rhythmic accompaniment effect can be obtained. Similarly, the timing at which the bass sound is generated is specified based on a pattern (hereinafter, referred to as a base pattern), which is a set of, for example, 16 steps independent of the chord pattern. Just do it.

At this time, the designation of the chord progression of the chord sound produced by the chord pattern, that is, how the chord type is designated in accordance with the progress of the music, is determined by the player in a specific key area (hereinafter, referred to as a key area) on the keyboard. This is called an accompaniment key) at any time, or the performer pre-stores the chord progression in a predetermined chord memory and performs an automatic accompaniment based on the chord progression. Note that the designation of the bass progression of the bass sound produced by the bass pattern, that is, how the bass interval is designated in accordance with the progression of the music, is usually determined by the root of the chord type designated by each chord progression. Specify as the pitch of the sound.

[Problems to be solved by the invention]

However, in the above conventional example, the bass pitch and the chord type do not progress unless the player specifies the chord progression. In this case, especially for beginners, it is very difficult to successively designate chords with an accompaniment key during automatic accompaniment, and there is a problem that an expected automatic accompaniment effect cannot be obtained.

Further, even if the chord progress is stored in the memory in advance, a beginner does not know what chord type should be specified and in what order, and as a result, an automatic accompaniment effect as expected cannot be obtained. Having.

Furthermore, the chord progression often differs depending on the rhythm of the song when performing automatic accompaniment, for example, rock waltz march, etc., but it is even more difficult for a beginner to make a chord progression difference due to a difference in rhythm. There is a problem that is.

An object of the present invention is to enable a beginner to easily specify a chord progression, thereby enabling automatic accompaniment with bass chord accompaniment as expected by a player, and in this case, a variety of rhythms based on rhythm differences. An object of the present invention is to enable chord progression to be realized by a simple operation.

[Means for solving the problem]

The present invention is premised on an automatic accompaniment device that performs an automatic accompaniment by emitting a bass sound and a chord sound based on a predetermined bass pattern and a chord pattern. Here, the chord pattern means, for example, 16 steps (corresponding to a sixteenth note) for designating a timing at which a chord sound is generated.
It is a pattern to be a set. Then, in the chord pattern, it is specified whether or not to generate a chord tone for each step, and the 16-step chord pattern is sequentially read at a constant tempo, and it is determined and controlled whether or not to generate a chord for each step. While controlling the sound timing of the chord sound, the above-mentioned 16 steps are repeatedly read out to perform the automatic accompaniment with the chord sound. Similarly, the bass pattern is a pattern in which, for example, 16 steps independent of the chord pattern are specified as a set for designating the timing at which the bass sound is to be emitted. Do.

In the automatic accompaniment device, first, the rhythm pattern storage means is means for storing a plurality of types of rhythm patterns. This means stores each rhythm pattern such as rock waltz march.

Next, the rhythm selection means is means for selecting any one rhythm pattern from a plurality of types of rhythm patterns stored in the rhythm pattern storage means. This is a changeover switch for each rhythm such as rock, waltz, and march.

The rhythm pattern control means sequentially reads out the rhythm pattern selected from the rhythm pattern storage means by the rhythm selection means, and emits the rhythm sound based on the read rhythm pattern.

Further, the chord progression storage means is a means for storing chord progression data corresponding to each of a plurality of types of rhythm patterns stored in the rhythm pattern storage means.

The chord progression data in this case includes, for example, scale data specifying a scale, chord name data specifying a chord name, and note length data specifying a length for generating a chord type determined by the scale data and the chord name data. , And a plurality of data sets consisting of Also, different chord progression data are stored, one for each type, corresponding to a plurality of rhythms such as rock, waltz, and march.

Further, the automatic chord progression control means selects chord progression data corresponding to the rhythm pattern selected by the selection means from the chord progression storage means, and reads out the selected chord progression data by the rhythm pattern control means. This is a means for sequentially reading out the chord sound and the base sound based on the read chord progression data, a predetermined chord pattern and a base pattern in conjunction with the operation. The means is, for example, one of the chord progression data stored in the chord progression storage means corresponding to the selection operation by the rhythm selection means.
This is a means for reading out sets, and for each set, specifying a pitch of a bass tone determined by the scale data and chord name data by a length determined by the pitch data.

The chord progression storage means further stores a plurality of types of tempo data for each rhythm pattern stored in the rhythm pattern storage means, and the automatic chord progression control means stores the rhythm selection data from the chord progression storage means. When reading tempo data corresponding to the rhythm pattern selected by the means, it is preferable to include tempo control means for controlling the tempo of the rhythm pattern reading operation by the rhythm pattern control means based on the tempo data.

Further, the tempo control means changes a tempo data in accordance with an operation of the tempo change switch for changing a tempo, and reads out a rhythm pattern by the rhythm pattern control means based on the changed tempo data. It is desirable to include tempo changing means for changing the tempo of the operation.

[Action]

 The operation of the present invention is as follows.

First, the chord progression memory means in advance how chord progression data indicating whether to specify a chord progression is stored. With this chord progression data, it is possible to specify not only the chord type (and bass interval) but also how long each chord type (and bass interval) should be pronounced. Further, a plurality of chord progression data are stored corresponding to a plurality of rhythms.

Then, in accordance with the chord progression data, the automatic chord progression control means sequentially specifies the type of the chord tone emitted by the chord pattern and the pitch of the bass tone emitted by the bass pattern.

In this case, when the player switches the rhythm with the rhythm selecting means, the chord progression data corresponding to the switched rhythm is read. Even if the rhythm is switched during the automatic accompaniment, the chord progression data to be read can be changed.

Here, the base pattern and the code pattern are also:
Not only one type but also a plurality of types corresponding to the plurality of rhythms may be prepared, and may be changed in accordance with the change of the chord progression data.

When the tempo data corresponding to the rhythm pattern selected by the rhythm selection means is read from the chord progression storage means, the tempo of the rhythm pattern reading operation by the rhythm pattern control means is controlled based on the tempo data. You may do so.

Further, the tempo data may be changed according to an operation of a tempo changeover switch, and the tempo of the rhythm pattern reading operation by the rhythm pattern control means may be changed based on the changed tempo data.

As described above, all difficult bass chord progressions are performed automatically, and when the rhythm is switched, the chord progression can be switched with one touch in accordance with the rhythm. Since the chord progression can be easily specified, even beginners can easily enjoy automatic accompaniment.

Also, as the chord progresses, the tempo can be switched with one touch according to the rhythm, and a variety of chord progressions and tempos corresponding to each rhythm can be easily specified, so even beginners can easily accompaniment automatically. You can enjoy.

In addition, the tempo is controlled according to the rhythm,
Since the player can change the tempo arbitrarily using the tempo changeover switch even during automatic accompaniment, even beginners can easily enjoy automatic accompaniment.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<< Configuration of Embodiment >> FIG. 1 is a configuration diagram of an embodiment of the present invention.

The central control device (CPU, hereinafter the same) 1 is a control device for controlling the entire operation, and has a flag counter register group (FCR, the same applies hereinafter) 1011 therein.

The CPU 101 includes a keyboard section 104, a switch section 105, a pattern memory section 106, a chord progression memory section 107, a chord judge section.
108 and the timer clock generator 10 are connected. A rhythm counter (RC, the same applies hereinafter) 103 that counts up by +1 based on the timer clock from the timer clock generator 102 is connected. And CPU101
Controls the melody sound generation unit 109, the accompaniment sound generation unit 110, and the rhythm sound generation unit 111, and emits a musical sound through the sound system 112.

As exemplified in the accompaniment sound generation unit 110, the melody sound generation unit 109, the accompaniment sound generation unit 110, and the rhythm sound generation unit 111 include, for example, a DCO (Digital c
Controlled Oscillator (1101), DCW (Digital Control) that controls the timbre of the output waveforms of the envelope generator 1102 and DCO 1101 that determine the time-dependent changes in its characteristics
led Wave) 1103, an envelope generator 1104 for determining the temporal change of the timbre characteristic, and a DCA (Digital Controlled) for controlling the volume of the output waveform of the DCW 1103.
Amplifier) 1105 and an envelope generator 1106 that determines the time-dependent change in the volume characteristics of the amplifier. Various parameters of the envelope generators 1102, 1104, and 1106 are changed to realize various musical sound waveforms. I do. Note that the present invention is not limited to the above-described configuration. For example, the rhythm sound generating unit 111 stores a musical tone waveform of an actual rhythm instrument in a memory, and reads out and outputs this in synchronization with a rhythm pattern described later. A configuration of a PCM sound source type may be adopted.

The sound system 112 is means for amplifying and emitting a musical sound waveform output from the melody sound generation unit 109, the accompaniment sound generation unit 110, and the rhythm sound generation unit 111, and is, for example, an amplifier and a speaker.

FIG. 2 shows the appearance of the keyboard unit 104 shown in FIG. As shown in the drawing, the key 1041 is composed of a plurality of keys 1041. In the present embodiment, C ₂ from 0 octave (OC = 0) to 5 octave (OC
= 5) capable of generating a scale of 5 octaves to C ₇ of the.
Of these, the accompaniment key 1042 to C ₂ .about.B ₃ is in the normal play functions as an ordinary key for musical note, in the normal mode of the automatic accompaniment to be described later, serves as a key code specified.

In addition, adjacent to the keyboard unit 104, the switch unit 105 shown in FIG.
Are arranged as shown in FIG. The switch unit 105 is a switch group for performing various settings for automatic accompaniment.

Rhythm switch (hereinafter, switch is referred to as SW) 1051
Consists of six switches # 1 to # 6.
By pressing one, the rhythm at the time of automatic accompaniment can be designated. In this case, rhythms such as rock, waltz, march, samba, folk and fusion are assigned to the rhythm SW 1051 of # 1 to # 6.

The auto chord progression SW 1052 is a switch for specifying an auto chord progression mode, which will be described later. When this switch is pressed, the LED above it turns on.

A start SW 1054 and a stop SW 1055 are switches for starting and stopping automatic accompaniment.

Intro SW1053, Fill-in SW1056 and Ending
SW1057 is a switch for starting an intro performance, a fill-in performance, and an ending performance, respectively.

The tempo-up SW 1058 and the tempo-down SW 1059 are switches for increasing and decreasing the tempo of the automatic accompaniment, respectively.

<< Schematic Operation of Embodiment >> The schematic operation of the embodiment having the above configuration will be described first.

First, during normal performance without automatic accompaniment, key information KI shown in FIG. 4 is input from the keyboard section 104 shown in FIG. The key information KI includes ON / OFF information OF indicating key depression / key release, a key code KC indicating one scale out of 12 scales, and an octave code OC indicating an octave. When any key 1041 (FIG. 3) on the keyboard 104 is depressed, the CPU 101
Is based on the above key code KC and octave code OC.
The pitch information corresponding to the depressed key is generated and supplied to the melody sound generation unit 109. As a result, the melody sound generator 1
09 generates a melody sound based on the pitch information and emits the sound via the sound system 112.

Next, at the time of automatic accompaniment, it is possible to designate two types, a normal mode and an auto chord progression mode.

First, in the normal mode, the player can select one of the six rhythms such as rock, waltz,..., And then, when automatic accompaniment is started, the rhythm sound shown in FIG. 1 is generated. The unit 111 starts and repeats the rhythm accompaniment sound in a rhythm pattern composed of 16 independent steps for each rhythm instrument sound with a plurality of rhythm instrument sounds. In this case, 16 steps correspond to, for example, one bar on the score, and therefore, for example, the same rhythm pattern is repeated for each bar.

In this state, the player operates the keyboard 104 shown in FIG. 1 or FIG.
By pressing any of the accompaniment keys 1042 between C _{2 and} B ₃ , the accompaniment sound generation unit 110 shown in FIG. 1 outputs a root tone corresponding to the accompaniment key in 16 steps different from the rhythm pattern. The sound of the accompaniment sound with the predetermined bass sound is started and repeated in the base pattern of. At the same time, the first
From the accompaniment sound generation unit 110 shown in the figure, a chord corresponding to the above-mentioned accompaniment key, a chord pattern including 16 steps different from the rhythm pattern and the base pattern, and a chord composed of, for example, three or four tones of a predetermined chord tone. Accompaniment sound is started and repeated.

Thus, in the normal mode, for example, if a rock rhythm is selected, in addition to the rhythm accompaniment of the rock rhythm pattern by a plurality of rhythm instrument sounds, the chord sound specified by the accompaniment key 1042 in FIG. Based on this, automatic accompaniment can be performed by the base accompaniment of the rock base pattern / base timbre and the chord accompaniment of the lock chord pattern / chord timbre. At this time, the performer
By the key 1041 of the higher scale than B ₃ of the keyboard portion 104 of FIG freely perform a melody or the like to fit the accompaniment.

Next, in the auto chord progress mode, when the rhythm is selected and the automatic accompaniment is started in the same manner as in the normal mode, the rhythm accompaniment is started and repeated in the same manner as in the normal mode, and at the same time, the bass is different from the rhythm pattern. Bass accompaniment and chord accompaniment also start with the pattern and chord pattern. In this case, the base pattern and the chord pattern repeat a predetermined 16-step pattern corresponding to the selected rhythm, and the base sound and the chord sound specified at this time are the predetermined chord progression corresponding to the selected rhythm. Is automatically specified over multiple measures.

In this manner, in the auto chord progression mode, for example, when a rock rhythm is selected, in addition to the rhythm accompaniment of the rock rhythm pattern by a plurality of rhythm instrument sounds, the bass accompaniment of the rock base pattern / bass progression and the rock chord are performed. Automatic accompaniment can be performed by the chord accompaniment of the pattern chord progression. And, the performer
A melody performance or the like can be freely performed in accordance with the accompaniment by using an arbitrary key 1041 of the keyboard section 104 shown in FIG.

Note that in both the normal mode and the auto chord progression mode, the player can use the intro SW1053, FIG.
Various performance effects can be added by the fill-in SW 1056 and the ending SW 1057, and the rhythm SW 1051 in FIG. 3 can be switched even during the performance.

<< Detailed Operation in Normal Mode >> Next, a detailed operation in the normal mode during automatic accompaniment will be described. FIGS. 5 to 10 particularly relate to the normal mode in the operation flowchart when the CPU 101 executes a program (not shown).

Description of FCR First, FIG. 13 shows the FCR 1011 in FIG.
Items related to the operation in the normal mode are listed below.

Rhythm number register RR (FIG. 13 (a)); 3-bit register pattern register PR (FIG. 13 (a) indicating which rhythm is currently designated among rhythm SW 1051 of # 1 to # 6 in FIG. b)); a 2-bit register indicating whether the current rhythm pattern or chord pattern is a main pattern, a fill-in pattern, an intro pattern, or an ending pattern, a prerhythm number register PRR (FIG. 13 (c)); A 3-bit register indicating the rhythm number immediately before the rhythm is specified Accompaniment flag BF (FIG. 13 (e)); a 1-bit flag indicating whether an automatic accompaniment or an automatic rhythm is currently being performed Tempo data register TR (FIG. 13 (f)): a 5-bit register indicating the current tempo, and the rhythm counter RC counts up based on this tempo. Auto chord progress flag ACR (FIG. 13 (g)); 1-bit flag indicating whether or not the auto chord progress mode is set. Pattern change standby flag PTF (FIG. 13 (h)); Rhythm switching is performed or ending SW 1057 ( (Fig. 3)
1-bit flag indicating whether or not a pattern is actually switched until the pattern is actually switched. The operation of the normal mode will be described below with reference to the operation flowcharts of FIGS. 5 to 10. .

Standby Operation First, when the player turns on the power of the main body (not shown), the main operation flowchart of FIG. 5 starts, and initial processing is first performed in S501. The details of this process are shown in FIG. That is, S601-
In S610, various flags are initialized. The reason why the content of the tempo data register TR is initialized to 16 is that the register can take a value of 0 to 31 as described later.
This is to set the tempo in the middle. The registers and the like set in S606 and S610 are used at the time of operation in an auto code progress mode described later. After these processes, the initial process ends (S609 → S610).

After the initial processing of S501 in FIG. 5, the processing loop of S502 to S506 is repeated.

First, in S502, tempo processing is performed. The details of this process are shown in FIG. That is, it is determined in S701 whether or not the tempo-up SW 1058 in FIG. 3 has been pressed. If it is determined that the same switch has been pressed, the value of the tempo data register TR is incremented by 1 in S704.
Then, the tempo is raised and the tempo processing ends (S704 →
S703). If the determination in S701 is NO, it is determined in S702 whether or not the tempo down SW 1059 in FIG. 3 has been pressed, and if it is determined that the SW has been pressed, the value of the tempo data register TR is decremented by one in S705, and the tempo is reduced. To end the tempo processing (S7
05 → S703). The value of the register is controlled so that it does not become 0 or less or 31 or more, though not particularly shown.
If the determination in S702 is NO, the tempo process ends without performing the tempo control (S702 → S703).

After the tempo processing in S502 in FIG. 5, an initial rhythm switching processing is performed in S503. The details of this process are shown in FIG. That is, it is determined in S801 whether or not the rhythm SW 1051 in FIG. 3 has been switched. If YES, the process proceeds from S801 to S802, and a value corresponding to the rhythm number of the rhythm SW 1051 is set in the rhythm number register RR. The rhythm is switched, and the initial rhythm switching process ends (S803 → S804). Here, as shown in FIG. 13 (a), the values of 0 to 5 are set as 3-bit binary numbers corresponding to the rhythm numbers # 1 to # 6 (see also FIG. 3). On the other hand, if the rhythm SW 1051 has not been switched and the determination in S801 is NO, the initial rhythm switching process ends without performing anything (S801 → S804).

After the initial rhythm switching process in S503 in FIG. 5, it is determined in S504 whether the auto chord progression SW 1052 in FIG. 3 has been pressed. Now, the switch is not pressed in normal mode,
The judgment is no.

Subsequently, in S505, it is determined whether or not the intro SW1053 in FIG. 3 has been pressed. The case where the button is pressed will be described later.

If the determination in S505 is NO, in S506 the start SW10 shown in FIG.
It is determined whether 54 has been pressed.

If the start SW 1054 is not pressed, the above S502 to S506
Is repeated, and the auto code progress SW 1052 in FIG.
It waits until either the intro SW1053 or the start SW1054 is pressed.

Reproduction operation of only rhythm sound In the standby state of S502 to S506 in FIG.
When the start switch 1054 shown in the figure is pressed, a playback operation of only the rhythm sound starts.

First, after the determination in S506 is YES, it is determined in S509 whether or not the content of the accompaniment flag BF is 1, that is, whether the automatic accompaniment or the automatic rhythm is being performed. Since the flag is initially set to 0 in the initial processing in S501 (S608 in FIG. 6), the auto rhythm is initially performed and the determination in S509 is NO.

Subsequently, if the player does not press the accompaniment key 1042 in FIG. 2, the determination in S519 is also NO, and the rhythm reproduction process in S514 is performed. The details of this process are shown in FIG.

First, in S901, S902, and S903, it is determined whether the value of the pattern register PR is 1, 2, or 3, that is, whether the pattern to be automatically accompanied is a fill-in pattern, an intro pattern, or an ending pattern. When the player presses the start SW 1054, the register is initially set to 0 in the initial processing of S501 (S605 in FIG. 6), so this pattern is initially set, and the determinations in S901 to S903 are all NO. To S904.

In S904, it is determined whether the value of the pattern change standby flag PTF is 0 or not. Although the function of this flag will be described later, since the flag is initially set to 0 in the initial processing of S501 (S607 in FIG. 6), the determination in S904 is NO.
And the process proceeds to S905.

In S905, a process of reading the step indicated by the counter value of the RC (rhythm counter) 103 in FIG. 1 from the 16-step main rhythm pattern corresponding to the rhythm number indicated by the rhythm number register RR is performed. Now, a rhythm pattern (a chord pattern and a base pattern will be described later) having a configuration as shown in FIG. 14 is stored in the pattern memory unit 106 connected to the CPU 101. As shown in the figure, the rhythm pattern is composed of four patterns: a main pattern, a fill-in pattern, an intro pattern, and an ending pattern.
Each of the six rhythms has a pattern of 16 steps from 0 to 15. FIG. 15 (a) shows a rhythm pattern of 16 steps in FIG. As shown in the figure, at the time of automatic accompaniment, it is possible to specify whether or not to produce a rhythm sound for each step by a binary number of 0 or 1 for each of eight rhythm instrument sounds. Where BD is the bass drum sound, SN is the snare drum sound,
CH is a closed hi-hat sound, OH is an open hi-hat sound, T1 to T2 are toms 1 to 3, and CY is a cymbal sound. Due to these configurations, in S905 of FIG.
The CPU 101 shown in the figure stores the rhythm numbers (# 1 to # 6) corresponding to the values indicated by the rhythm number register RR among the main rhythm patterns of FIG. 14 stored in the pattern memory unit 106.
Of the rhythm pattern of Fig. 1
The step corresponding to the counter value of 103 is read.

Following the operation described above, in S906 in FIG. 9, the rhythm sound generation unit 111 in FIG. 1 is instructed to generate a rhythm sound for which "1" is designated in the read step. At this time, as shown in FIG. 15 (a), about eight kinds of rhythm sounds are generated in parallel, so that the above operation also requires eight timbres. This is because the rhythm sound generation unit 111 of FIG. By performing the time division operation, each rhythm sound can be performed independently. As a result, the rhythm sound generation unit 111 generates a rhythm sound for each rhythm sound at a timing based on the rhythm pattern, and emits the sound via the sound system 112.

When the processing of S906 ends, the process proceeds to S907, and the reproduction processing of the rhythm sound for one step ends.

When the rhythm reproduction process for one step is completed in S514 in FIG. 5, the process waits for the input of the timer clock from the timer clock generator 102 in FIG. 1 by repeating S515.

When the timer clock is input, at step S516 the RC10 of FIG.
3 is counted up.

Then, after the processing of S517 and S518 (described later), S5
Each of the determinations of 09 and S519 is NO (these will also be described later),
The rhythm reproduction process of S514 is performed again. In this case, FIG.
In S905, since the value of RC103 in FIG. 1 is incremented by 1,
Among the main rhythm patterns of FIG. 14 stored in the pattern memory unit 106 of FIG.
The step of reading from the main rhythm pattern of the rhythm number (any of # 1 to # 6) corresponding to the value indicated by (1) proceeds by one from the previous processing. Then, in accordance with the read-out steps, a rhythm sound generation process is performed in S906 of FIG.

As described above, S509 → S519 → S514 → S515 to S5 in FIG.
By repeating the loop process from 18 to S509, the main rhythm of 16 steps of the rhythm number (any of # 1 to # 6) corresponding to the value indicated by the rhythm number register RR in the main rhythm pattern of FIG. The patterns are sequentially read out, and a rhythm sound is emitted correspondingly. In this case, RC103 in FIG.
After counting up, the process returns to step 0 again, so that each rhythm sound is repeatedly sounded for a predetermined 16 steps. Then, these 16 steps correspond to, for example, one bar on the musical score. In other words, about eight kinds of rhythm sounds at the time of automatic accompaniment repeatedly play a fixed rhythm pattern for each bar.

When the tempo is switched during the playback operation of only the rhythm sound In the playback operation of only the rhythm sound, the sounding speed of the rhythm sound is the speed at which the RC103 in FIG. 1 is counted up in S516 in FIG. 5, that is, in S515. It is determined by the speed at which the timer clock is input from the timer clock generator 102 in FIG. The input timing of the timer clock is determined by the CPU 101 shown in FIG.
31 levels are determined according to the values of ~ 31. The value of the tempo data register TR is initially set to an intermediate value 16 in the initial processing of S501 in FIG. 5 (S602 in FIG. 6), and may be changed in S502 in FIG. 5 before the automatic accompaniment. .

In addition to this processing, the player performs the third
By operating the tempo-up SW 1058 or the tempo-down SW 1059 in the figure, the tempo data register is set in S517 in FIG.
The value of TR can be changed. This process is exactly the same as the tempo process of S502, and is shown in FIG. 7 already described.

Through the above processing, the player can change the tempo of the rhythm sound being sounded even during automatic accompaniment.

When the rhythm is switched during the playback operation of only the rhythm sound In the playback operation of only the rhythm sound, the main rhythm pattern of any of the rhythm numbers # 1 to # 6 is selected in the main rhythm pattern of FIG. Are # 1 to # 6 corresponding to the values 0 to 5 indicated by the rhythm number register RR.
Rhythm number is selected.

The value of the rhythm number register RR is changed in step S503 in FIG. 5 before the automatic accompaniment starts, and even during the reproduction of the rhythm sound, the player can change the rhythm SW1051 of # 1 to # 6 in FIG.
The rhythm pattern can be arbitrarily changed by selecting a desired one from among the above. This operation is realized as a part of various switching processes in S518 in FIG. 5, and details of the processes are shown in FIG.

First, the determinations in S1001 to S1003 are all NO (this will be described later), and the process proceeds to S1004. If the rhythm SW 1051 in FIG. 3 is not switched, the determination in S1004 is NO, and the various switching processes in S518 in FIG. On the other hand, when the same switch is switched, S1004
Is YES, and the process proceeds to S1005 and S1006.

In S1005, the value of the rhythm number register RR so far is copied to the prism number register PRR. Next S1006
Then, the rhythm is switched by setting a value corresponding to the rhythm number of the rhythm SW 1051 in the rhythm number register RR.

Next, in S1007, it is determined whether or not the counter value (indicating the next step to be sounded) of RC103 in FIG.
That is, it is determined whether or not it is a time when the break of the 16-step rhythm pattern is just right.

If the determination in S1007 is YES, that is, if the timing is just a good break, the process advances to S1008 to determine whether the value of the auto code progress flag ACR is 1 or not. Since the current mode is the normal mode, the contents of the ACR are initially set to 0 in the initial processing in S503 in FIG. 5 (S60 in FIG. 6).
3), if this determination is NO, the process proceeds to S1012. In S1012, after the value of the pattern change waiting flag PTF is set to 0, the process proceeds to S1013, and the various switching processes in S518 in FIG. 5 are ended. In other words, the PTF value becomes 0 at a timing at which the 16-step rhythm pattern has a good break.

On the other hand, if the determination in S1007 is NO, that is, the timing is in the middle of the 16-step rhythm pattern, the process proceeds to S1014, where the value of the pattern change standby flag PTF is set to 1, and in S1013, the various switching operations in FIG. The process ends. That is, at a timing in the middle of the 16-step rhythm pattern, the value of the PTF becomes 1.

After the value of the rhythm number register RR is changed and the value of the pattern change standby flag PTF is set as described above, the determinations of S509 and S519 in FIG. 5 become NO, and the rhythm reproduction process of S514 is performed again. to go into.

Here, if the rhythm is switched at a timing at which the present rhythm pattern of 16 steps is just a good break, the value of the pattern change standby flag PTF is 0.
After S901 to S903 in the drawing, the determination in S904 is YES. Therefore, in the next S905, the rhythm is switched among the main rhythm patterns in FIG. 14 stored in the pattern memory unit 106 in FIG. 1 and the rhythm number corresponding to the new value indicated by the rhythm number register RR is changed. The present rhythm pattern is sequentially read from step 0, and thereafter, a rhythm sound is generated in the changed rhythm pattern.

On the other hand, if the rhythm is switched in the middle of the 16-step rhythm pattern, the value of the pattern change standby flag PTF is 1, and after S901 to S903 in FIG. 9, the determination in S904 is NO and S908 Proceed to.

In S908, the real rhythm pattern of the rhythm number corresponding to the value indicated by the prerhythm number register PRR among the real rhythm patterns of FIG. 14 stored in the pattern memory unit 106 of FIG. The step corresponding to the counter value is read out. Here, since the value corresponding to the rhythm number before the rhythm is switched is stored in the prerhythm number register PRR, the next S909
Until the value of RC103 in FIG. 1 is determined to be 15, the process proceeds to S906, where a rhythm sound is generated in the present rhythm pattern before the rhythm is switched.

Then, the rhythm reproduction process of S514 is repeated by the loop of S509 to S518 in FIG. 5, and when the value of RC103 in FIG. 1 becomes 15 in S909 in FIG. 9, that is, the rhythm pattern to be sounded next Is the final 15 steps, the determination is YES, and after the determination in the next S910 is NO (the ACR value is 0 because of the normal mode), S91
At 3 the value of the pattern change waiting flag PTF is returned to 0,
Proceeding to S906, the final step of the present rhythm pattern before the rhythm is switched is generated. After this operation, S5 in FIG.
When the rhythm reproduction process of S514 is started again after the loop of 09 to S518, the determination of S904 in FIG. 9 is YES because PTF is set to 0.
In step S905, the rhythm number corresponding to the new value indicated by the rhythm number register RR due to the switching of the rhythm among the main rhythm patterns in FIG. 14 stored in the pattern memory unit 106 in FIG. Are sequentially read from step 0, and thereafter, a rhythm sound is generated with the changed rhythm pattern.

In this way, when the rhythm is switched at a timing in the middle of the 16-step main rhythm pattern, the rhythm is switched to a new main rhythm pattern after the sound is generated in the main rhythm pattern before the rhythm is switched until a good break point.

When the fill-in SW is pressed during the rhythm sound-only reproduction operation The operation when the player presses the fill-in SW 1056 in FIG. 3 while the rhythm reproduction process of S514 is being repeated by the loop of S509 to S518. Will be described. In this case, a rhythm sound is generated in a fill-in rhythm pattern from the timing to the fifteenth step, and thereafter, the process returns to the main rhythm pattern.

The switching preparation process for this is performed in various switching processes in S518 of FIG. That is, in FIG. 10, S1
When the determination of 001 is YES, the process proceeds to S1015,
Here, the value 1 is set in the pattern register PR, and S1013
Then, the various switching processes in FIG. 5S518 are completed.

After the value of the pattern register PR is changed as described above, the determinations of S509 and S519 in FIG.
The rhythm reproduction process of S514 starts.

Then, in FIG. 9, since the above PR = 1, the judgment of S901 is YE
In S, the process proceeds to S914. In S914, the counter of RC103 in FIG. 1 is obtained from the fill-in rhythm pattern of the rhythm number corresponding to the value indicated by the rhythm number register RR among the fill-in rhythm patterns in FIG. 14 stored in the pattern memory unit 106 in FIG. Read the step corresponding to the value.

After that, until the value of RC103 is determined to be 15 in the next S915, the process proceeds to S906, where a rhythm sound is generated in a fill-in rhythm pattern.

As described above, even when the rhythm is switched at a timing during the 16-step main rhythm pattern, the rhythm pattern is immediately changed to the fill-in rhythm pattern. Thus, the fill-in effect can be added to the rhythm sound being generated at the timing when the player presses the fill-in SW 1056 in FIG.

Based on the above operation, the rhythm reproduction process of S514 is repeated by the loop of S509 to S518 in FIG.
When the value of RC103 in FIG. 1 becomes 15 at 15, that is, when the rhythm pattern to be sounded next becomes the last 15 steps, the determination in S915 becomes YES and the process proceeds to S916.

In S916, the content of the pattern register PR is returned to 0, and preparation for returning to the present rhythm pattern is made. Then, S916
Steps S919 to S919 are performed, and these processes are processes in an auto code progress mode described later. After these processes, the process proceeds to S906, where the rhythm sound of the last step of the fill-in rhythm pattern is generated.

After the above operation, when the rhythm reproduction process of S514 is started again after going around the loop of S509 to S518 in FIG. 5, since PR is set to 0, the determination of S901 to S903 in FIG. It returns to the sounding operation by the pattern.

When the ending SW is pressed during the rhythm sound-only playback operation The operation when the player presses the ending SW 1057 in FIG. 3 while the rhythm playback process of S514 is being repeated by the loop of S509 to S518. Will be described. In this case, after the rhythm sound is generated to the place where the break is good in the present rhythm pattern, the rhythm sound is generated by the ending rhythm pattern of 16 steps, and the automatic accompaniment by the rhythm sound is completed.

The switching preparation process for this is performed in various switching processes in S518 of FIG. That is, in FIG. 10, S1
When the determination of 002 is YES, the process proceeds to S1016,
Here, the value 3 is set in the pattern register PR, and the process proceeds to S1007.

In S1007, it is determined whether or not the counter value of the RC 103 in FIG. 1 is 0, that is, whether or not the timing at which the rhythm pattern of the 16-step main rhythm pattern is just a good break is present.

If the determination in S1007 is YES, that is, a timing that is just a good break, the determination in S1008 is NO and the process proceeds to S1012, the value of the pattern change standby flag PTF is set to 0, and then the various types of S518 in FIG. The switching process ends. That is, as in the case of the rhythm switching during the rhythm sound reproducing operation, the value of the PTF becomes 0 at a timing at which the 16-step main rhythm pattern has a good break.

On the other hand, if the determination in S1007 is NO, that is, if the timing is in the middle of the 16-step rhythm pattern, the process proceeds to S1014, where the value of the pattern change standby flag PTF is set to 0. The process ends. That is, at a timing in the middle of the 16-step rhythm pattern, the value of the PTF becomes 1. This is the same as in the case of the rhythm switching.

After the value of the pattern register PR is changed and the value of the pattern change standby flag PTF is set as described above, the determinations of S509 and S519 in FIG.
Rhythm playback processing.

Then, the determination in S903 of FIG. 9 becomes YES, and the process proceeds to S920 and proceeds to the processing of the ending rhythm pattern.

Here, if the ending SW 1057 in FIG. 3 is pressed at a timing when the rhythm pattern of the present 16-step rhythm pattern is good, the value of the pattern change standby flag PTF is 0, and the determination in S920 is YES. Therefore, the next S
At 921, among the ending rhythm patterns of FIG. 14 stored in the pattern memory unit 106 of FIG. 1, the ending rhythm pattern of the rhythm number corresponding to the value indicated by the rhythm number register RR is sequentially read from step 0. After that, until the value of RC103 is determined to be 15 in the next S922, the process proceeds to S906, where a rhythm sound is generated in the ending rhythm pattern.

Then, the rhythm reproduction processing of S514 is repeated by the loop of S509 to S518 in FIG. 5, and when the value of RC103 becomes 15, that is, when the rhythm pattern to be sounded next becomes the last 15 steps The determination in S922 is YES, and S
At 923, the last step of the ending rhythm pattern is pronounced.

After this operation, the process jumps from S923 to the process of S1017 via the path of FIG. 10 in the various switching processes of S518 of FIG. Then, since the determination in S1017 is NO (the ACR value is 0 in the normal mode), the process proceeds from S1017 to S5 in FIG.
The process jumps to the processing after S603 via the route of FIG. 6 in 01, and the automatic accompaniment ends. After this processing, FIG.
After the initial processing of 01 is performed (processing after S603 in FIG. 6), the processing of S502 to S506 is repeated, and the auto code progress SW1052, intro SW1053 or start and SW1054 of FIG.
Wait until one of is pressed. Note that S6 in FIG.
Initial setting of the rhythm number register RR and tempo data register TR of 01 and S602 is not performed, then start SW1054
Is pressed, automatic accompaniment starts with the rhythm number and tempo up to now.

On the other hand, when the ending SW 1057 in FIG. 3 is pressed at a timing during the present rhythm pattern of 16 steps, the value of the pattern change standby flag PTF is 1, so the determination in S920 in FIG. move on.

In S924, the main rhythm pattern of the rhythm number corresponding to the value indicated by the rhythm number register RR among the main rhythm patterns of FIG. 14 stored in the pattern memory unit 106 of FIG. Read the step corresponding to the counter value. That is, until the value of RC103 in FIG. 1 is determined to be 15 in the next S909, the process proceeds to S906, where a rhythm sound is generated in the present rhythm pattern.

Then, the rhythm reproduction process of S514 is repeated by the loop of S509 to S518 in FIG. 5, and when the value of RC103 in FIG. 1 becomes 15 in S909 in FIG. 9, that is, the rhythm pattern to be sounded next Is the final 15 steps, the determination is YES, and after the determination in the next S910 is NO (the ACR value is 0 because of the normal mode), S91
At 3 the value of the pattern change waiting flag PTF is returned to 0,
Proceeding to S906, the final step of the rhythm pattern is pronounced.

After this operation, when the rhythm reproduction process of S514 is started again after going around the loop of S509 to S518 of FIG. 5, since the PTF is set to 0, the determination of S920 of FIG.
The steps are performed by the processing of S920 → S921 → S922 → S906,
A rhythm sound is pronounced in the ending rhythm pattern.

Then, the sound processing of the rhythm sound is repeated, and when the value of RC103 becomes 15, the determination in S922 is NO, and after the last step of the ending rhythm pattern is sounded in S923, the automatic The accompaniment operation ends.

As described above, the player can easily add the ending effect to the rhythm pattern by pressing the ending SW 1057 in FIG. 3 at the end of the automatic accompaniment.

In the case of starting with the intro SW at the time of starting the reproducing operation of only the rhythm sound When the rhythm reproducing process of S514 is started by the loop of S509 to S518, the player performs the intro SW1053 of FIG.
The operation when the user presses to start the operation will be described. In this case, first, a rhythm sound for 16 steps is generated in the intro rhythm pattern, and then the operation shifts to a rhythm sound generation operation in the present rhythm pattern.

First, when the player presses the intro SW1053 in FIG. 3 in the standby state by the processing loop of S502 to S506 in FIG. 5, the determination in S505 becomes YES, the process proceeds to S507, and the value 2 is set in the pattern register PR. Then, it enters the mode of the introrhythm pattern. After that, start SW1054 (3rd
As in the case of pressing (FIG.), The determinations of S509 and S519 are NO, and the rhythm reproduction process of S514 is started.

In this case, the determination in S902 in FIG. 9 is YES, and the process proceeds to S926. In S926, among the introrhythm patterns of FIG. 14 stored in the pattern memory unit 106 of FIG. 1, the introrhythm pattern of the rhythm number corresponding to the value indicated by the rhythm number register RR is sequentially read from step 0.

Thereafter, until the value of RC103 in FIG. 1 is determined to be 15 in the next S927, the process proceeds to S906, where a rhythm sound is generated in an introrhythm pattern.

Based on the above operation, the rhythm reproduction process of S514 is repeated by the loop of S509 to S518 in FIG.
In step 27, when the value of RC103 in FIG. 1 becomes 15, that is, when the next rhythm pattern to be sounded is the last 15 steps, the determination in S927 is YES and the process proceeds to S928.

In S928, the contents of the pattern register PR are changed to 0,
Preparations for shifting to this rhythm pattern are made. After this processing, the process proceeds to S906, where the final step of the introrhythm pattern is generated.

After the above operation, when the rhythm reproduction process of S514 is started again after going around the loop of S509 to S518 of FIG. 5, since PR is set to 0, the determination of S901 to S903 of FIG. The operation shifts to the sounding operation based on the pattern.

As described above, the player performs the third
By pressing the intro SW1053 in the figure, the effect of the intro can be easily added to the rhythm pattern.

When the stop switch is pressed during the playback operation of only the rhythm sound While the rhythm playback process of S514 is being repeated by the loop of S509 to S518, the player stops the playback shown in FIG.
The operation when SW1055 is pressed will be described.

In this case, in the various switching processes in S518 of FIG.
The determination in S1003 in FIG. 10 is YES, and the process proceeds to S1017. Since the determination in S1017 is NO (A in the normal mode
The value of CR is 0), and from S1017 to 6th in S501 of FIG.
The process jumps to the processing of S603 and subsequent steps via the path shown in the figure, and ends the automatic accompaniment. The subsequent processing is the same as the processing at the end of the automatic accompaniment when the player presses the ending SW 1057 in FIG.

When the accompaniment key is pressed during the playback operation of only the rhythm sound While the rhythm playback processing of S514 is repeated by the loop of S509 to S518, the keyboard unit 104 of FIG.
, Any of the accompaniment keys 104 between C _{2 and} B ₃ NO in FIG.
The operation when the key 2 is pressed will be described.

In this case, key information KI shown in FIG. 4 corresponding to the pressed accompaniment key is input from keyboard section 104 to CPU 101 in FIG.

This input state is detected in S519 of FIG. 5 while the rhythm sound is being generated, and the determination is YES.

As a result, first, the accompaniment flag BF is set to 1 in S520, and the mode shifts to the accompaniment mode.

Subsequently, a code judge is performed in S521. This is because the key information K is transmitted from the CPU 101 of FIG.
By passing I, the code judge unit 108
Determine the key code KC and octave code OC in KI,
This is a process of determining the root note and chord of the pressed key.

Next, bass sound reproduction processing is performed in S512. This process
This is a process for performing accompaniment with a bass tone at the pitch of the root tone determined by the chord judge unit 108 in FIG. 1, and performs the same process as the rhythm reproduction process in S514 except that a pitch is specified. Accordingly, the details thereof are in accordance with the details of the rhythm reproduction process shown in FIG.

In this case, the pattern memory 106 in FIG.
A base pattern having the same configuration as that of the rhythm pattern shown in the figure is stored. That is, the base pattern is composed of four patterns, namely, a main pattern, a fill-in pattern, an intro pattern, and an ending pattern, and each pattern is composed of a pattern of 16 steps for each rhythm of # 1 to # 6. FIG. 15 (c) shows a base pattern of each of the 16 steps shown in FIG. As shown in the figure, at the time of automatic accompaniment, it is possible to specify whether or not to produce one type of bass sound for each step by using a binary number of 0 or 1.

In combination with the above configuration, the base playback process of S512 in FIG.
By performing in accordance with the rhythm reproduction processing of S514, the main rhythm pattern, fill-in rhythm pattern, ending rhythm pattern, and rhythm sound reproduction processing based on the intro rhythm pattern are synchronized with the main rhythm pattern, fill-in base pattern, ending A bass sound reproduction process based on the base pattern and the intro base pattern is performed. That is, the fill-in SW shown in FIG.
The operation at the time of reproducing the bass sound for the 1056, the ending SW 1057, the intro SW 1053, and the like is exactly the same as the case of reproducing the rhythm sound.

Although the bass sound (single sound) is produced by the accompaniment sound generator 110 in FIG. 1, the chord sound described later is also produced by the accompaniment sound generator 110. Can be generated in parallel by time division processing.

Next, a chord sound reproduction process is performed in S513. This process
This is a process for performing a chord accompaniment with the chord determined by the chord judge unit 108 in FIG. 1, and performs the same process as the rhythm reproduction process in S514 except that a chord is specified. Therefore, as in the case of the bass sound reproduction, the details thereof correspond to the details of the rhythm reproduction processing of FIG.

In this case, the pattern memory 106 in FIG.
A chord pattern having the same configuration as that of the rhythm pattern shown in the figure is stored. FIG. 15 (b) shows the
The code patterns for each of the 16 steps in the figure are shown. As shown in the figure, at the time of automatic accompaniment, it is possible to specify whether or not to generate one type of chord sound (3 to 4 sounds are simultaneously pronounced as chords) for each step by a binary number of 0 or 1. It is.

In combination with the above configuration, the code reproduction process of S513 in FIG.
By following the rhythm reproduction process of S514, the present rhythm pattern, fill-in rhythm pattern, ending rhythm pattern, and rhythm sound reproduction process based on the intro rhythm pattern are synchronized with the main code pattern, fill-in code pattern, ending code pattern, A reproduction process of a chord sound based on the intro chord pattern is performed. That is, the operation of the chord sound reproduction for the fill-in SW 1056, the ending SW 1057, the intro SW 1053, and the like in FIG. 3 is exactly the same as the case of the reproduction of the rhythm sound.

The reproduction of the chord sound is performed by the accompaniment sound generation unit 110 shown in FIG. 1 as described above. In this case, since the chord sounds usually have three to four sounds, the plurality of sounds are generated in parallel by time division processing.

In the above-described bass sound and chord sound reproduction processing, once the key information KI is input from the accompaniment key 1042 (FIG. 2) in S519 of FIG. 5, the accompaniment flag BF is set to 1 in S520.
Is set to, so from the next step the judgment of S509
The determination is YES, and the determination in S510 is NO (the ACR value is 0 because of the normal mode), and the code judge is directly performed in S521. Therefore, in the reproduction of the bass sound and the chord sound at each step by repeating the loop of S509 to S518, if there is no input of new key information KI, the sound is repeated with the same pitch and chord of the root note, and the player When the accompaniment key 1042 in FIG. 2 is newly pressed, the pitch and chord of the root note are changed accordingly.

As described above, when the player presses the accompaniment key 1042 in FIG. 2 during the reproduction of the rhythm sound, the rhythm sound, the bass sound, and the chord sound are reproduced while repeating an independent 16-step pattern. By pressing the accompaniment key 1042 one after another, automatic accompaniment can be performed while changing the pitch of the bass sound and the chord type of the chord sound at that timing.

<< Detailed Operation in Auto Chord Progression Mode >> Next, a detailed operation in the auto chord progression mode during automatic accompaniment will be described. In addition to the operation flowcharts of FIGS. 5 to 10, FIGS. 11 and 1 are operation flowcharts relating to the auto code progress mode.

Description of FCR First, in the FCR 1011 of FIG. 1 shown in FIG. 13, those related to the operation of the auto code progress mode in addition to those described in the normal mode are listed below.

Progress register SR (FIG. 13 (d)); a 2-bit register that indicates whether the current chord progression data is a main chord progression, a fill-in chord progression, an intro chord progression, or an ending chord progression. Counter for subtracting and counting the duration of progression Code counter CC; Counter for increasing the address of chord progression data Code name register CCR; Register for storing code name data CD Scale code register OTCR; Store scale data OTD Registers to be Performed Hereinafter, the operation of the auto code progress mode will be described with reference to the operation flowcharts of FIG. 5 to FIG.

Auto chord progress mode processing First, when the player turns on the main body (not shown), the standby state described in the normal mode,
That is, in the repetitive operation of S502 to S506 in FIG.
When the player presses the auto chord progression SW 1052 in FIG. 3, S5
When the determination in 04 is YES, the process proceeds to the auto chord progress mode processing in S508. This process is a process in a standby state before starting the auto chord progression operation.
Figure 11 shows.

First, in S1101, a value 1 indicating the auto code progress mode is set in the auto code progress flag ACR.

In the next step S1102, the LED above the auto chord progress switch 1052 in FIG. 3 is turned on to inform the player that the auto chord progress mode has been set.

Next, in S1103, a value 1 indicating that accompaniment is being performed is set in the accompaniment flag BF. This is because in the auto chord progression mode, the accompaniment operation by the bass sound and the chord sound is always performed.

Further, in S1104, the tempo data TD corresponding to the rhythm number currently specified by the rhythm number register RR is set in the tempo data register TR. Now
The chord progression memory unit 107 in FIG. 1 stores tempo data TD as a rhythm header corresponding to each of the rhythm numbers # 1 to # 6 as shown in FIG. The details of the tempo data TD are shown in FIG. As shown in the figure, the tempo data TD is 5-bit binary data, which can designate a tempo of 0 to 31. By having the tempo data TD corresponding to each rhythm number, every time the player switches the rhythm SW 1051 in FIG. 3, the tempo data corresponding to the selected rhythm number is obtained.
TD is read from the rhythm header of the chord progression memory unit 107 in FIG. 1 and set in the tempo data register TR. This is because, for example, a rock has a fast tempo and a waltz has a relatively slow tempo, so that an optimal tempo is automatically set when the rhythm is switched.

After the processing of S1101 to S1104, the process enters the input waiting state of each switch by repeating S1105 to S1109. That is,
In the auto code progress mode, S1106, S1107 and S1108
By the respective determination processes of the above, the player can start the SW 105 shown in FIG.
4. Pressing either the rhythm SW 1051 or the intro SW 1053 starts the auto chord progress mode.
Each of these will be described later.

Here, in S1105, the player performs the tempo-up SW1058 or the tempo-down
This is a process by which the tempo when the automatic accompaniment is to be performed can be arbitrarily changed by SW1059, and is the same as the tempo process of S502 in FIG. 5 in the normal mode standby (see FIG. 7).

Step S1109 is a process for exiting the auto chord progress mode and returning to the initial state again when the player presses the auto chord progress switch 1052 in FIG. 3 again while waiting in the auto chord progress mode. That is, when the auto chord progress SW 1052 is pressed, the determination in S1109 becomes YES, whereby the value of the auto chord progress flag ACR is returned to 0 in S1115, and the mode returns to the normal mode.
At 6, the LED above the auto code progress SW 1052 in FIG. 3 is turned off. After these operations, the process jumps from S1116 to the process after S603 via the path in FIG. 6 in S501 in FIG.
The automatic accompaniment ends. The subsequent processing is the same as the processing at the end of the automatic accompaniment when the player presses the ending SW 1057 in FIG. 3 in the normal mode.

Auto chord progression processing During the standby of the auto chord progression mode in S1105 to S1109 in FIG. 11, the player switches the start SW1054 or the rhythm SW10 in FIG.
When any one of the keys 51 is pressed, the process proceeds to the auto chord progress processing. When the intro SW1053 is pressed,
It will be described later.

First, when the start SW 1054 is pressed, the determination in S1107 is YES, and in S1110, the auto chord progress mode processing in S508 in FIG. 5 is terminated, and the flow proceeds to the auto chord progress processing in S511.

If any of the rhythm SW 1051 is pressed, S1
The determination at 108 is YES, and the process proceeds to S1111. In S1111, a value corresponding to the rhythm number of the pressed rhythm SW1051 is set in the rhythm number register RR to switch the rhythm. In the next S1112, similarly to the operation in S1104, tempo data TD corresponding to the rhythm number set in the rhythm number register RR is set in the tempo data register TR. After these processes, in S1110, the auto chord progress mode process of S508 in FIG. 5 ends, and the process proceeds to the auto chord progress process of S511.

As described above, the start SW1054 or the rhythm SW1051
Is pressed to enter the auto chord progression processing of S511 in FIG. 5, thereafter, every time the RC (rhythm counter) 103 is counted up by the timer clock from the timer clock generator 102 in FIG. , S in FIG.
The processing of 509 to S518 is repeated. In this case, the determination in S509 is YES because the accompaniment flag BF is set to 1 in S1103 in FIG. 11, and the determination in S510 is also S11 in FIG.
At 01, the auto code progress flag ACR is set to 1, so that the answer is YES. Therefore, in the auto code progress processing, S50
The loop processing of 9 → S510 → S511 to S518 → S509 is repeated. Hereinafter, the processing will be described.

First, in the loop of S509 to S518, the rhythm reproduction process of S514 is exactly the same as the rhythm reproduction process in the normal mode, and the rhythm sound is repeated in a 16-step rhythm pattern. Also, the base playback processing of S512 and
The chord reproduction process of S513 is the same as the operation when the player presses the accompaniment key 1042 in FIG. 2 in the normal mode. Is repeated. That is, for example, a rhythm sound having the same rhythm pattern, a base sound having the same base pattern, and a chord sound having the same chord pattern are repeated every bar. Note that the rhythm pattern, the base pattern, and the chord pattern are independent patterns.

In the above operation, the pitch at the time of the bass reproduction processing and the chord type at the time of the chord reproduction processing were specified by the player in the normal mode by sequentially specifying the accompaniment key 1042 in FIG. In the mode, their designation is automatically performed over a plurality of measures, which is a great feature that the burden on the player is significantly reduced.

In order to realize the above operation, the chord progression memory unit 107 connected to the CPU 101 in FIG. 1 stores chord progression data having a configuration as shown in FIG. As shown in the figure, the chord progression data is composed of four types of chord progressions: main chord progression, fill-in chord progression, intro chord progression, and ending chord progression. 32 for each rhythm
It consists of chord progression data of a step.

FIG. 18 shows chord progression data of each of the 32 steps in FIG. The scale data OTD specifies scale names such as A and F ^# using 4-bit binary data. Code name data CD
Specifies a minor (m), a major (M), a seventh (7th), and the like using 4-bit binary data. Therefore, the chord type for each step is determined by the scale data OTD and the chord name data CD. The duration data OD is
The duration of each chord is specified by 4-bit binary data. The minimum unit of the chord is one step of a rhythm pattern or the like, and corresponds to sixteenth notes, eighth notes, and so on. Then, the duration data OD for each step is
As described later, the value is subtracted during sound generation, and when the value becomes 0, the process proceeds to the next step. It should be noted that, as shown in FIG. 18 (shown in the 31st step in FIG. 18), the sound length data OD at an appropriate step out of the 31st step is “111” indicating the end.
It contains data of 1 "(" F "in hexadecimal notation), and a code type with an arbitrary step length can be specified by steps other than this step.

In this case, the concept of the steps in FIG. 16 or FIG. 18 is different from the steps of the rhythm pattern, the base pattern, the chord pattern, and the like in FIG. 14 or FIG. That is, one step of the chord progression data corresponds to a plurality of steps such as a rhythm pattern defined by the duration data OD as described above. Hereinafter, in order to distinguish them, a step of a rhythm pattern or the like is called a pattern step, and a step of chord progression data is called a code step. Therefore, while the base pattern and the chord pattern repeat 16 pattern steps for each bar, the chord progression data defining the base interval and chord type at that time are, for example, the chord of the 0th chord step is C, and the pitch is chord length. 8. Am the code of the first code step
Tone length 8, the code of the second code step F, tone length 8, third code step of the code G _7, tone length 4, 4
If the chord of the chord step is C and the duration is 4,..., The first eight pattern steps of the first bar are C chords,
The next 8 pattern steps are Am code, the first 8 pattern steps in the second bar are F code, the next 4 pattern steps are G ₇ code, the last 4 pattern steps are C code,
..., while the chord is specified, the automatic accompaniment in the auto chord progress mode proceeds. In addition,
The specification of the bass pitch is performed, for example, by the root note (the first
Sound).

FIG. 12 shows details of S511 in FIG. 5 for realizing the above-described code designation operation.

First, the determination in S1201 is initially YES because the tone length counter OC is initially set to 0 in the initial processing in S501 in FIG. 5 (S609 in FIG. 6).

Next, in S1202, S1203 and S1204, whether the value of the progress register SR is 1, 2 or 3, that is, whether the chord progression to be automatically accompanied is a fill-in chord progression, an intro chord progression or an ending chord progression Is determined. The performer starts the start SW1054 or the rhythm SW1051 shown in FIG.
In the state where is pressed, the register is initialized to 0 in the initial processing in FIG. 5 S501 (S606 in FIG. 6),
At first, this chord progression, all judgments of S1202 to S1204
No, the process proceeds to S1205.

In step S1205, among the main chord progression data of FIG. 16 stored in the chord progression memory unit 107 of FIG. 1, the counter value of the chord counter CC is obtained from the main chord progression data corresponding to the rhythm number indicated by the rhythm number register RR. The process of reading the code step indicated by is performed. Since the value of the code counter CC is initially set to 0 in the initial process in FIG. 5 S501 (S609 in FIG. 6), the code progress data of the 0th code step is read at first.

Next, until the final step, the determination in S1206 is NO.
Then go to S1209. Here, first, the note length data OD (see FIG. 18) of the 0th chord step is stored in the note length counter OC.
In the next S1210, the scale data OTD of the 0th code step is set in the scale code register OTCR, and the following S
At 1211, the code name data CD is set in the code name register CCR. Thus, the designation of the code type corresponding to the 0th code step is completed.

After the above process, the count value of the chord counter CC is incremented by 1 in S1212, the count value of the tone length counter OC is decremented by 1 in S1213, and the auto chord progression process of S511 in FIG.

After the above processing, the base reproduction processing is performed in S512. At this time, the scale corresponding to the scale data OTD of the 0th code step set in the scale code register OTCR is designated.

Further, a code reproduction process is performed in S513. At this time, the chord type is the scale data OTD of the 0th code step set in the scale code register OTCR and the code name data CD set in the code name register CCR.
Is specified based on

In addition to the above base playback processing and code playback processing, a fifth
By performing the rhythm reproduction process in S514 in the figure, the automatic accompaniment for one pattern step is completed.

Thereafter, the timer clock is input from the timer clock generator 102 in FIG. 1 by repeating S515, and the first clock is input in S516.
RC103 in the figure is counted up. And S517, S51
After the above processing (described above), each judgment of S509 and S510 becomes YE
At S, the auto code progress processing of S511 is performed again.
In this case, in S1201 in FIG.
Since the sound length data OD of the 0th chord step is set in C, the determination in S1201 is NO until the value becomes 0. In this case, only the process of decrementing the counter value of the tone length counter OC by -1 is performed in S1213, and the auto chord progression process of S511 in FIG. 5 ends in S1214. Therefore, in the bass reproduction process of S512 and the chord reproduction process of S513 in FIG. 5, the same scale and chord type as in the previous pattern step are specified.

In the above state, the value of the pitch counter OC is decremented to 0
, Ie, until the pattern steps for the sound length data OD of the 0th chord step are repeated.

Then, the value of the pitch counter OC is set to 0 in S1201 of FIG.
Is determined, after the determination of S1202 to S1204 becomes YES, the code step indicated by the counter value of the code counter CC is read out of the main chord progression data corresponding to the rhythm number indicated by the rhythm number register RR in S1205. Perform processing. Now, the code counter CC is
Since the value of +1 is incremented in S1212 at the beginning of the reading of the step, the value indicates 1 and, therefore, the code progress data of the first code step is read here. Then, similarly to the 0th chord step, the contents of the pitch counter OC, the scale code register OTCR, and the chord name register CCR are set to contents corresponding to the chord progression data of the first chord step in S1209 to S1211. Code counter C
The value of C is incremented by 1, and the value of the pitch counter OC is decreased by 1 in S1213.
Then, in S1214, the auto code progress processing of S511 in FIG. 5 is completed.

By the above processing, the base reproduction processing of S512 in FIG.
In the chord reproduction process of S513, a scale and a chord type are designated based on the scale data OTD and the chord name data CD of the first chord step, and this state is maintained until the pattern steps corresponding to the duration data OD of the first step are repeated. Continue.

The above operation is repeated while sequentially reading out each chord step of the present chord progression data, and in FIG. 12 S1205, when the last chord step of the present chord progression data is read out, as described above, the tone length data OD is: Since the hexadecimal expression is "F", the determination in S1206 is YES. As a result, the code counter CC is reset to 0 in the next S1207, the chord progression data of the 0th code step is read out again in S1208, and the processes in S1209 and thereafter are repeated.

Therefore, when the present code progress data is read and reaches the last code step, this code step is not read, and the process returns to the 0th code step and repeats the same code progress.

When tempo or rhythm is changed during auto chord progression processing During the above auto chord progression processing, the player
By operating the tempo-up SW 1058 or the tempo-down SW 1059 in the figure, the tempo data register is set in S517 in FIG.
You can change the value of TR. This process is exactly the same as the tempo process in S502, and is shown in FIG. 7 already described.

Next, an operation when the rhythm is switched during the auto chord progress processing will be described. This processing conforms to the processing when the rhythm is switched during the reproduction operation of only the rhythm sound. However, in the auto chord progress mode, as described above, the chord progress memory unit 10 shown in FIG.
A rhythm header as shown in FIG. 16 is stored in FIG. 7, and when the rhythm is switched, the tempo data is also switched correspondingly. Therefore, it is necessary to add this processing.

That is, first, when the determination of S1007 in FIG. 10 is YES, that is, when the rhythm is switched at a timing that is just a good break in the 16-step rhythm pattern, the determination of S1008 becomes NO in the normal mode, Although the pattern change standby flag PTF was set to 0 in S1012, the determination in S1008 is YES during the auto chord progress processing, and
If the judgment of No. 9 is NO (the value of the pattern register PR is currently 0 for this rhythm pattern), S1010
Proceed to. Here, similarly to the operation of S1104 in FIG. 11, tempo data TD corresponding to the rhythm number set in the rhythm number register RR in S1006 in FIG. 10 is set in the tempo data register TR. After this process, as in the case of the normal mode, the pattern change standby flag PTF is set to 0 in S1012, and the various switching processes in FIG. 5 are ended in S1013.

On the other hand, when the rhythm is switched in the middle of the 16-step rhythm pattern, in the normal mode, S904 → S908 → FIG.
By executing the processing of S909 → S906, after the sound is generated in the main rhythm pattern before the rhythm is switched, when the timing of the break is good, the determination of S909 in FIG. 9 becomes YES, and the determination of S910 is further performed. The result was NO, and the pattern change standby flag PTF was set to 0 in S913 to switch the rhythm. However, at the time of the auto chord progression processing, the judgment in S909 in FIG. Thereafter, the determination in S910 is YES. Furthermore, the judgment of S911 is NO
(Because the PR value is currently 0), go to S912 and
As in the operation of S1104 in the figure, tempo data TD corresponding to the rhythm number set in the rhythm number register RR in S1006 in FIG. 10 is set in the tempo data register TR. Then, at S913, the pattern change wait flag
Set PTF to 0.

As described above, when the rhythm is switched, the content of the tempo data register TR is switched to a new value. Thereafter, the timing at which the timer clock is input is determined in S515 of FIG. 5 according to the content of this register, First in S517
The speed at which the RC103 in the figure is counted up is determined.

When the rhythm is switched at a timing in the middle of the 16-step main rhythm pattern, in the rhythm reproduction process of S514 in FIG. The rhythm is switched so that the main base pattern in the base reproduction process in S512 and the main code pattern in the code reproduction process in S513 are the same. When switched, S120 in FIG. 12
At 5, the operation is immediately performed to switch to the chord progression data corresponding to the new rhythm number indicated by the rhythm number register RR.

When the fill-in SW is pressed during the auto-chord progress processing, the player presses the fill-in SW 1056 in FIG. 3 while the automatic accompaniment in the auto-chord progress mode is repeated by the loop of S509 to S518 in FIG. The operation in the case of the above will be described.

In this case, in the rhythm reproduction processing of FIG.
As in the case of the normal mode, FIG. 9 S901 → S914 → S9
15 → S906 is repeated to fill in
When SW1056 is pressed, the rhythm pattern immediately changes to a fill-in rhythm pattern. S513 base playback processing and
The same applies to the base pattern and the code pattern in the code reproduction process in S513.

On the other hand, in the auto chord progression process of S511, the progress register
The content of SR does not change, and indicates the value 0, that is, the progress of this code. Then, the rhythm reproduction process in FIG. 9 (S51 in FIG. 5)
In 4), since the contents of the SR remain 0 until the pattern step of the fill-in rhythm pattern reaches the final 15th pattern step and the determination in S915 becomes YES, the twelfth pattern step is performed.
The processing state in the figure does not change, and the chord progression is maintained.

Then, in the rhythm reproduction process of FIG. 9, if the pattern step of the fill-in rhythm pattern is the final fifteenth step and the determination in S915 is YES, the pattern register PR is set to 0 in S916 and returns to the main rhythm pattern. . On the other hand, since the progress register SR is set to 1 in S917, the chord progress data becomes fill-in chord progress. Then, in S918 and S919, the counter values of the chord counter CC and the tone length counter OC are forcibly reset to zero. In addition, at this time, the base reproduction process of FIG.
In the code reproduction process in S513, the base pattern and the code pattern have also returned to the main pattern.

As a result, the determination in S1201 in FIG. 12 becomes YES, and further,
The determination in S1202 becomes YES, and the process proceeds to S1215. Then, here, a process of reading the code step indicated by the counter value of the code counter CC, that is, the 0th code step, from the fill-in chord progress data corresponding to the rhythm number indicated by the rhythm number register RR is performed. After this, go to S1216 → S1209 → S1210 → S1211 → S1212 → S1213,
The setting of the 0th code step of the fill-in code progress data is performed.

Hereinafter, the operation is exactly the same as that of the present chord progression data. In the base reproduction processing of S512 and the chord reproduction processing of S513 in FIG.
Chord scale data OTD and chord name data CD
Specifies the scale and chord type, and this state continues until the pattern steps for the duration data OD of the 0th step are repeated.

Then, the value of the pitch counter OC is set to 0 in S1201 of FIG.
Is determined, the process proceeds again from S1201 to S1202 to S1215, the next first step fill-in chord progression data is read out, and a tone generation process is performed based on the data.

The above operation is repeated while sequentially reading out each code step of the fill-in code progress data, and FIG.
At step 6, when the last chord step of the fill-in chord progression data is read out,
Since OD is “F” in hexadecimal notation, the determination in S1216 is YES. As a result, in the next S1217, the progress register SR
Is returned to 0, and the mode returns to the chord progress mode. And S1
At 218, the code counter CC is reset to 0, and at S1205, the chord progression data of the 0th code step of the chord progression is read, and thereafter, the chord progression proceeds.

An example of the above fill-in operation is shown in FIG. First, a rhythm pattern, a base pattern, and a chord pattern advance in the present pattern as shown in FIG. Each break is
Shows the pattern step breaks every 16 steps. The chord progression data also progresses with the chord progression. Each delimiter indicates a delimiter by a code step in which “F” is included as the tone length data OD. In this state, if a fill-in occurs at the timing of T1 in the figure, the rhythm pattern or the like immediately changes to the fill-in pattern, but the chord progression data still maintains the chord progression. Then, when the rhythm pattern or the like becomes a break of 16 pattern steps at the timing of T2, the rhythm pattern or the like returns to the main pattern thereafter. On the other hand, the chord progression data is forcibly changed to the fill-in chord progression at T2, and returns to the main chord progression after proceeding with the fill-in chord progression up to the break of the code step of T3.

The reason why the fill-in of a rhythm pattern or the like precedes and the fill-in of chord progression data follows thereafter is that a musically natural effect can be obtained. By setting the number of code steps of the fill-in chord progression data to be shorter than that of the chord progression data, the effect of the fill-in can be enhanced. In this case, in the fill-in chord progression data shown in FIG. 16, an end code “F” may be inserted as the duration data OD of the earliest chord step that does not reach the 31st step.

When the ending SW is pressed during the auto chord progression process, the player presses the ending SW 1057 in FIG. 3 while the automatic accompaniment in the auto chord progress mode is repeated by the loop of S509 to S518 in FIG. The operation in the case of the above will be described.

First, when the ending SW 1057 is pressed at a timing at which the present rhythm pattern of 16 code steps is just a good break, the various switching processes in FIG.
10, proceeding from S1002 to S1016, the value 3 is set in the pattern register PR, and further proceeding from S1007 to S1008 to S1009 to S1011, the counter values of the pitch counter OC and the chord counter CC are reset to 0, Value 3 in progress register SR
Is set. Then, the process proceeds to S1012, where 0 is set to the pattern change standby flag PTF.

By the above operation, in the rhythm reproduction process of FIG. 5 S514, the value of the pattern change standby flag PTF is 0, so that S902 → S920 → S9 as in the case of the normal mode.
Proceeding to 21, the ending rhythm pattern is sequentially read from pattern step 0. The same applies to the base pattern and the code pattern in the base reproduction process in S512 and the code reproduction process in S513 in FIG.

On the other hand, in the auto chord progression process of S511, the process proceeds from S1201 → S1202 → S1203 → S1204 in FIG.
The determination at 4 is YES, and the flow proceeds to S1219. Here, of the ending chord progression data of FIG. 16 stored in chord progression memory section 107 of FIG. 1, the ending chord progression data corresponding to the rhythm number indicated by rhythm number register RR is used to determine the counter value of chord counter CC. , Ie, the process of reading the 0th code step. And after this, S1220 → S1210 →
The process proceeds from S1211 to S1212 to S1213, and the setting of the 0th code step of the ending code progress data is performed.

Hereinafter, the operation is exactly the same as that of the present chord progression data. In the bass reproduction processing of S512 and the chord reproduction processing of S513 in FIG. 5, sound is generated in the scale / chord type based on the ending chord progression data.

Next, when the ending SW 1057 in FIG. 3 is pressed at a timing in the middle of the main rhythm pattern of 16 chord steps, the various switching processes in FIG.
Proceeding to S1016, the value 3 is set in the pattern register PR. Further, proceeding S1007 → S1008 → S1009 → S1010, 1 is set to the pattern change standby flag PTF.

By the above operation, in the rhythm reproduction process of FIG. 5 S514, the value of the pattern change standby flag PTF is 1, so that S902 → S920 → S9 as in the case of the normal mode.
Proceeding to 24, the steps of this rhythm pattern are read.
The same applies to the base pattern and the code pattern in the base reproduction process in S512 and the code reproduction process in S513 in FIG.

On the other hand, in the auto code progression process of S511, the value of the progress register SR still indicates the main code progression with the value 0, so that the reading of the main code progression data described above is continued. Therefore, in the bass reproduction process of S512 and the chord reproduction process of S513 in FIG. 5, the scale and the chord type are designated and sounded by the scale data OTD and the chord name data CD of each chord step based on the chord progression data.

Then, the automatic accompaniment process by the loop of S509 to S518 in FIG. 5 is repeated, and in S909 in FIG. 9, the RC10 in FIG.
If the value of 3 becomes 15, the determination becomes YES, and S910 →
Proceed with S911. And the value of the pattern register PR is
Since it is set to 3 in S1016, the determination in S911 is YES and S9
Proceeding to 25, the counter values of the pitch counter OC and the chord counter CC are reset to 0, and the progress register
The value 3 is set in SR. Then, the process proceeds to S913, where 0 is set to the pattern change standby flag PTF.

After the above processing, in the rhythm reproduction processing of FIG. 5 S514, since the value of the pattern change standby flag PTF has become 0, the ending rhythm pattern is sequentially read in the order of S902 → S920 → S921, and FIG. The same applies to the base pattern and the code pattern in the base reproduction process of S512 and the code reproduction process of S513. Further, in the auto code progress processing of S511, in FIG. 12, S1201 → S1202 → S1
Proceeding from 203 to S1204, the determination in S1204 becomes YES, and proceeding to S1219, the ending code progress data is read out, and the fifth
In the bass reproduction process of S512 and the chord reproduction process of S513 in the figure, a tone is generated in a scale / chord type based on the ending chord progress data.

Then, the automatic accompaniment process is repeated by the loop of S509 to S518 in FIG. 5, and when the value of RC103 in FIG.
When the step is reached, the determination in S922 is NO, and the last step of the ending rhythm pattern is sounded in S923.

After this operation, the process jumps from S923 to the process of S1017 via the path of FIG. 10 in the various switching processes of S518 of FIG. The ending chord progression is forcibly terminated with the end of the ending rhythm pattern. And
Since the determination in S1017 in FIG. 10 is YES (the ACR value is 1 in the auto code progress mode), various flags, counters, and registers are reset in S1018 to S1023, and thereafter, in FIG. The process jumps to the processing of S1105 and subsequent steps via this route, and the automatic accompaniment ends. After this processing, S110
5 to S1109 are repeated, and the start SW1054 in FIG.
It waits until either the intro SW1053 or the rhythm SW1051 is pressed. Note that the initial settings of the rhythm number register RR and the tempo data register TR are not performed, and when the start SW 1054 or the like is pressed next, the automatic accompaniment starts with the rhythm number and the tempo so far. In FIG. 11, since the auto chord progress mode is on standby, the auto chord progress flag ACR and the accompaniment flag BF remain unchanged.

FIG. 20 shows an example of the above ending operation. First, the rhythm pattern, the base pattern, and the chord pattern advance in the present pattern as shown in the figure, and the chord progression data also advances in the chord progression. The meaning of each section is the same as in FIG. In this state, T4
When the ending occurs at this timing, the rhythm pattern, the base pattern, and the chord pattern together with the chord pattern maintain the chord progression until the break of 16 pattern steps is reached. Then, when the rhythm pattern or the like becomes a break of 16 pattern steps at the timing of T5, the rhythm pattern or the like thereafter shifts to an ending pattern,
The chord progression data is also forcibly shifted to the ending chord progression at T5. At the timing of T6, when the rhythm pattern or the like finishes sounding for 16 pattern steps, the processing of the automatic accompaniment ends, and the ending chord progression is also forcibly terminated. In this case, the ending code progress data does not actually need 32 code steps as shown in FIG. 16, and the end code “F” may be inserted as the tone length data OD of several code steps. Also, the ending rhythm pattern of 16 pattern steps can be repeated several times to end,
In this case, the ending code progress data may be stored for all 32 code steps.

When starting with the intro SW at the start of the auto chord progression process When starting the auto chord progression process of S511 of FIG. 5 by the loop of S1106 to S1109 in FIG. 11 of the auto chord progress mode process of S508 in FIG. Next, the operation when the player presses the intro SW1053 in FIG. 3 to start it will be described.

In this case, first, the determination in S1106 in FIG. 11 becomes YES.
Proceeds to S1113, where the pattern register PR and the progress register SR
Is set to 2 and the mode becomes the introrhythm pattern mode. Thereafter, the process proceeds to the auto code advance processing of S512 in FIG. 5 through S1110 in the same manner as when the start SW 1054 (FIG. 3) is pressed.

Hereinafter, the automatic accompaniment in the auto chord progress mode is repeated by the loop of S509 to S518 in FIG.
In the rhythm reproduction process of 14, the automatic accompaniment starts in the intro rhythm pattern by repeating the process of S902 → S926 → S927 → S906 in FIG. 9, as in the case of the normal mode. Then, the automatic accompaniment in the intro pattern is repeated for 16 pattern steps. When the value of RC103 (FIG. 1) becomes 15, the determination in S927 becomes YES and S928
, The pattern register PR is set to 0, and the operation shifts to the main rhythm pattern. Fig. 5 Base playback processing of S512 and S513
The same applies to the base pattern and the code pattern in the code reproduction process.

Next, in the auto chord progression processing of S511, the value of the progress register SR becomes 2 by pressing the intro SW1053, and the value of the pitch counter OC is 0 at the start, as described above. After the determination in S1201 in FIG. 12 is YES and the determination in S1202 is NO, the determination in S1203 is YES and the process proceeds to S1221. Here, the chord counter of the intro chord progression data corresponding to the rhythm number indicated by the rhythm number register RR is used.
The code step indicated by the CC counter value, that is, the 0th code step is read. After this, S1216 → S
The process proceeds in the order of 1209 → S1210 → S1211 → S1212 → S1213, and the setting of the 0th code step of the intro chord progression data is performed.

Hereinafter, the operation is exactly the same as in the case of the present chord progression data. In the base reproduction process of S512 and the chord reproduction process of S513 in FIG. Data CD
Specifies the scale and chord type, and this state continues until the pattern steps for the duration data OD of the 0th step are repeated.

Then, the value of the pitch counter OC is set to 0 in S1201 of FIG.
Is determined, the process proceeds again to S1201 → S1202 → S1203 → S1221, and the intro chord progression data of the next first step is read out, and the sound generation processing is performed based on this.

The above operation is repeated while sequentially reading each code step of the intro code progress data, and FIG.
When the last chord step of the intro chord progression data is read, the duration data OD (see FIG. 18) becomes 16
Since it is “F” in hexadecimal expression, the determination in S1216 is YES. As a result, the progress register SR is returned to 0 in the next S1217, and the mode shifts to the present code progress mode. And S1218
Resets the code counter CC to 0, reads out the chord progression data of the 0th code step of the chord progression in S1205, and thereafter proceeds to the chord progression.

FIG. 21 shows an example of the above intro operation. As shown in the figure, when the start is made with the intro SW1053 (FIG. 3) at the timing T7, the rhythm pattern, the base pattern and the chord pattern start with the intro pattern, and the chord progression data also starts with the intro chord progression. In this case, the rhythm pattern or the like ends the intro pattern in 16 pattern steps, and shifts to the present pattern at timing T8.
The intro pattern is repeated until the code step in which the code “F” is stored as shown in FIG.
Thereafter, since the process proceeds to the chord progression, the length of the intro such as the rhythm pattern may be different from the length of the intro of the chord progression data. It should be noted that the lengths can be set to be the same.

When the stop SW is pressed during the auto chord progression processing The player presses the stop SW 1055 in FIG. 3 while the automatic accompaniment in the auto chord progress mode is repeated by the loop of S509 to S518 in FIG. The operation in the case of the above will be described.

In this case, in the various switching processes in S518 of FIG.
10 The determination in S1003 in FIG. 10 becomes YES, and the process proceeds to S1017. And S
Since the determination at 1017 is YES (the ACR value is 0 in the auto code progress mode), the process proceeds to S1018. After this,
The automatic accompaniment ends as in the automatic accompaniment end processing when the ending SW 1057 (FIG. 3) is pressed.

<< Operation of Another Embodiment >> Next, the operation of another embodiment of the present invention will be described. Another embodiment described below relates to the operation when the fill-in SW 1056 and the intro SW 1053 in FIG. 3 are pressed during the auto-code progress processing. In this case, the operation flow chart of the rhythm reproduction processing of FIG. 9 is replaced with that of the other embodiment of FIG. 22, and the operation flow chart of the auto chord progression processing of FIG. 12 is replaced with that of the other embodiment of FIG. Replace it. Hereinafter, in FIGS. 22 and 23, a description will be given focusing on the portions to which processing numbers different from those in FIGS. 9 and 12 are assigned.

When the Fill-in SW is Pressed During the Auto-Chord Progression Processing First, while the automatic accompaniment in the auto-chord progress mode is being repeated by the loop of S509 to S518 in FIG. 5, the player enters the fill-in SW 1056 in FIG. The operation of another embodiment when is pressed will be described with reference to the operation explanatory diagram of FIG.

First, in FIG. 24, in a state where the rhythm pattern, the base pattern and the chord pattern advance in this pattern as shown in FIG. 24, and the chord progression data also advances in this chord progression, at the timing of T10 in FIG. When a fill-in occurs, in the rhythm reproduction processing of S514 in FIG. 5, the processing of S901 → S914 → S915 → S906 in FIG. 22 is the same as that in FIG. 9, so that the rhythm pattern or the like is immediately changed to the fill-in pattern. , The chord progression data still maintains the chord progression. This is the same as the operation at the timing of T1 in FIG.

Next, when the rhythm pattern or the like becomes a break of 16 pattern steps at the timing of T11 in FIG. 24, in the rhythm reproduction process in S514 in FIG. 5, the process from S915 to S916 in FIG. 22 is the same as that in FIG. Since the value of the current progress register SR is 0, the determination in S2201 is YES. Thereafter, the processes in S917 to S919 are the same as those in FIG. T1 for data
1 forcibly changes to fill-in chord progression. Thereafter, the fill-in chord progression is continued by the processing of S1202 → S1215 → S2301 → S1220 → S1210 in FIG. This processing is substantially the same as the processing of S1202 → S1215 → S1216 → S1209 → S1210 in FIG. As described above, the processing at the timing of T11 is the same as the operation at the timing of T2 in FIG.

〔The invention's effect〕

According to the present invention, all difficult bass chord progressions are performed automatically, and when the rhythm is switched, the chord progression can be switched with one touch corresponding to the rhythm. A simple chord progression can be easily specified. In addition, the tempo can be easily designated according to the chord progression, and the designated tempo can be arbitrarily changed during the automatic accompaniment, so that even a beginner can easily enjoy the automatic accompaniment.

[Brief description of the drawings]

1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is an external configuration diagram of a keyboard unit, FIG. 3 is an external configuration diagram of a switch unit, FIG. 4 is a data configuration diagram of key information, FIG. 5 is a flowchart of a main operation, FIG. 6 is a flowchart of an operation of an initial process, FIG. 7 is a flowchart of an operation of a tempo process, FIG. Fig. 10 is an operation flowchart of the rhythm reproduction process. Fig. 10 is an operation flowchart of various switching processes. Fig. 11 is an operation flowchart of the auto chord progress mode process. Fig. 12 is an operation of the auto chord progress process. 13 (a) to 13 (l) are configuration diagrams of a flag counter register group (FCR), FIG. 14 is a configuration diagram of a pattern memory unit, and FIGS. 15 (a) to 15 (c). Of each pattern FIG. 16 is a block diagram of a chord progression memory unit, FIG. 17 is a data configuration diagram of tempo data, FIG. 18 is a data configuration diagram of each chord progression data, and FIG. 19 is a fill-in FIG. 20 is an explanatory diagram of an ending operation, FIG. 21 is an explanatory diagram of an intro operation, FIG. 22 is an operational flowchart of a rhythm reproduction process of another embodiment, and FIG. FIG. 24 is an explanatory diagram of the fill-in operation of another embodiment, and FIG. 25 is an explanatory diagram of the intro operation of another embodiment. 101: Central control unit (CPU), 102: Timer clock, 103: Rhythm counter (RC), 104: Keyboard part, 105: Switch part, 106: Pattern memory part, 107: Chord progression memory Section 108 chord judge section 110 accompaniment sound generating section 111 rhythm sound generating section 111 112 112 sound system.

Claims (3)

(57) [Claims] 1. A rhythm pattern storage means for storing a plurality of types of rhythm patterns; a rhythm selection means for selecting any one rhythm pattern from the plurality of types of rhythm patterns stored in the rhythm pattern storage means; Rhythm pattern control means for sequentially reading the rhythm pattern selected from the rhythm pattern storage means by the selection means, and generating the rhythm sound based on the read rhythm pattern; and a plurality of rhythm patterns stored in the rhythm pattern storage means. Chord progression storage means for storing chord progression data corresponding to each of the types of rhythm patterns, and selecting chord progression data corresponding to the rhythm pattern selected by the rhythm selection means from the chord progression storage means, The selected chord progression data is Automatic chord progression control means for sequentially reading in conjunction with the readout operation by the turn control means, and generating a chord sound and a base sound based on the read chord progression data, a predetermined chord pattern and a base pattern. An automatic accompaniment device characterized by the following. 2. The chord progression storage means further stores a plurality of types of tempo data for each rhythm pattern stored in the rhythm pattern storage means, and the automatic chord progression control means stores When the tempo data corresponding to the rhythm pattern selected by the rhythm selection means is read, the tempo control means controls the tempo of the rhythm pattern reading operation by the rhythm pattern control means based on the tempo data. The automatic accompaniment device according to claim 1, wherein 3. The tempo control means changes a tempo data in accordance with an operation of the tempo change switch for changing a tempo, and operates the rhythm pattern control means based on the changed tempo data. 3. The automatic accompaniment apparatus according to claim 2, further comprising a tempo changing means for changing a tempo of a rhythm pattern reading operation.