JPH0769697B2 - Automatic accompaniment device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic accompaniment apparatus capable of producing a wide variety of automatic accompaniment sounds.

"Prior Art" An automatic accompaniment device has been developed that detects roots and chords from key depression data of a chord playing keyboard and performs automatic accompaniment based on the detection result and the selected rhythm type. .

In this type of automatic accompaniment device, the chord accompaniment (chord accompaniment) simultaneously produces a predetermined chord based on the information indicating the sounding timing, and the bass accompaniment consists of information indicating the sounding timing and information indicating the pitch. Based on pitch control, sound is generated. (JP-A-59-140495) "Problem to be Solved by the Invention" In the conventional automatic accompaniment apparatus described above, the sound range of each accompaniment part is always limited. That is,
The chord performance was performed in the chord pronunciation range, and the bass performance was performed in the bass pronunciation range.

As described above, in the conventional automatic accompaniment apparatus, since the musical range is fixed for each performance part, there is a drawback that the accompaniment performance is scarcely changed at the ending time or the fill-in time, for example.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an automatic accompaniment device that can play a variety of accompaniment sounds.

[Means for Solving the Problem] The automatic accompaniment apparatus according to the invention of claim 1 of the present application stores a plurality of pitch information and one octave information according to a performance order in association with each other and stores them as one accompaniment pattern. Means, (FIGS. 1 and 5) first reading means for reading the octave information from the storage means, and (FIG. 13 SPd2) for sequentially reading the pitch information from the storage means as the accompaniment progresses. Second reading means, (Fig. 13 SPd3-1)
0) conversion means for converting the pitch information read out from the second reading means into pitch information in the range set by the octave information read out from the first reading means (SPd12 in FIG. 13) It is characterized by comprising a musical tone generating means (SPd13 in FIG. 13) for generating a musical tone corresponding to the pitch information converted by the converting means.

The automatic accompaniment apparatus according to the invention of claim 2 stores a plurality of accompaniment patterns by associating a plurality of pitch information in accordance with the performance order with one octave information and tone color information to form one accompaniment pattern. Storage means (FIGS. 1, 5, and 4) and accompaniment padder selection means for selecting the accompaniment pattern;
(FIG. 10 SPa1) First reading means for reading the octave information and the tone color information corresponding to the accompaniment pattern selected by the accompaniment pattern selection means from the storage means (FIG. 10).
SPa2, SPa4, FIG. 13 SPd2) Second reading means for sequentially reading the pitch information corresponding to the accompaniment pattern selected by the accompaniment pattern selection means from the storage means according to the progress of the accompaniment,
13 SPd3 to 10) conversion means for converting the pitch information read from the second reading means into pitch information of a range set by the octave information read from the first reading means, SPd12) a tone generation means for generating a tone corresponding to the pitch information converted by the conversion means and the tone color information read from the first reading means, and (SPd13 in FIG. 13). To do.

Further, the automatic accompaniment apparatus according to the invention of claim 3 associates a plurality of pitch information and one octave information according to the performance order into one accompaniment pattern, and a plurality of performance patterns corresponding to a plurality of performance modes. Storage means for storing an accompaniment pattern, (FIGS. 1, 5 and 4) Performance mode selection means for selecting a performance mode, and FIG.
12, SP13, FIG. 11, SPb7 to 9) Octave information corresponding to the performance mode selected by the performance mode selection means is read out from the storage means.
And a second reading means for sequentially reading the pitch information corresponding to the accompaniment pattern selected by the performance mode selecting means from the storage means in accordance with the progress of the accompaniment. And (Fig. 13
SPd3 to 10) conversion means for reading the pitch information read from the second reading means into pitch information of a range set by the octave information read from the first reading means (Spd12 in FIG. 13). Musical tone generating means for generating musical tones corresponding to the pitch information converted by the converting means and (SPd13 in FIG. 13) are provided.

Also, in the automatic accompaniment apparatus according to claim 4, the performance mode selecting means according to claim 3 instructs ending instruction (SP12, SP13 in Fig. 9).
Is characterized in that.

The automatic accompaniment apparatus according to claim 5 is characterized in that the performance mode selecting means according to claim 3 is fill-in instructing means (P38 114 to 17) for instructing fill-in.

[Operation] According to the automatic accompaniment apparatus of claim 1 of the present application, the pitch information in the range set by the octave information read by the first reading means is set as the pitch information sequentially read by the second reading means. And the musical tone is generated based on the converted pitch information, and accompaniment is performed.

Further, according to the automatic accompaniment apparatus of claim 2, the pitch information sequentially read by the second reading means is converted into the pitch information within the range set by the octave information read by the first reading means. A musical tone of a tone color corresponding to the tone color information read by the first reading means and having a tone pitch based on the converted tone pitch information is generated and accompaniment is performed.

Further, according to the automatic accompaniment apparatus of claim 3, the pitch information sequentially read by the second reading means is converted into pitch information within the pitch range corresponding to the performance mode selected by the performance mode selection means, A musical tone is generated based on the converted pitch information, and accompaniment is performed.

Further, according to the automatic accompaniment apparatus of claim 4, at the time of ending, and according to the automatic accompaniment apparatus of claim 5, at the time of fill-in, the pitch information sequentially read by the second reading means corresponds to the pitch within the corresponding pitch range. The information is converted into information, and a musical tone is generated based on the converted pitch information, and accompaniment is performed.

[Examples] Examples of the present invention will be described below with reference to the drawings.

(1: Configuration of Embodiment) FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a keyboard unit, a plurality of keys, a plurality of key switches for detecting the on / off state of each key, and an interface for supplying a key code of each key switch to a bus line B. It is composed of a circuit. Therefore, FIG. 2 shows the correspondence between keys and key codes. In Fig. 2, the key code is displayed in decimal, and as can be seen from this figure, the numerical value of the key code changes by 1 for each semitone. For example, C ₁ sound is "36",
C ₃ sound is “60”.

2 is a CPU (central processing unit) that controls each part of the device, and 3 is a CPU
The program memory 2 in which the program 2 is arranged is a working memory 4 in which various registers and flags are set. The registers and flags in the working memory 4 will be described later.

Next, reference numeral 5 is a pattern memory in which a chord pattern PATC and a bass pattern PATB used when an accompaniment sound is generated are stored. Here, the format of the code pattern PATC is shown in FIG.

As shown in Fig. 3, the code pattern PATC is composed of 17 bytes of data, and relative addresses "-1", "0", "1", ... "15" are set in each byte. Has been done. The data at each address will be described below.

Address "-1": This address stores tone color data that indicates a tone color for accompaniment of chords.

Addresses "0" to "15": In each of these addresses, the tone generation mode instruction data PD for instructing the tone mode of the chord accompaniment are stored. As described above, the 32 pronunciation mode instruction data PD _{0 to} PD ₃₁ are stored in this embodiment so that one measure (4 beats) is divided into 16 parts, and sound generation control is performed at each divided timing. Also, the code pattern PATC is configured as pattern data for two measures. This pronunciation mode instruction data
PD is 4-bit data represented by (0) _H to (F) _H in hexadecimal notation and is sequentially used in 4-bit units according to each sounding timing.

A chord pattern PATC according to the above format is provided for each rhythm type and chord type, and further provided according to a normal pattern and an ending pattern. Here, the normal pattern is a pattern used in the normal part of the song, and the ending pattern is a pattern used in the final part of the song.

Next, FIG. 4 is a diagram showing a format of the base pattern PATB. As shown in Fig. 4, the base pattern PATB
Is 34 bytes of data. "-2" for each byte
The relative address of "31" is attached. The data at each address will be described below.

Address "-2": At this address, tone color data for instructing a tone color during bass performance is stored.

Address "-1": This address stores octave information for instructing how many octaves the pitch should be raised in the process of raising the pitch of the bass performance to generate the tone (described later).

The key information shown in FIG. 5 is written in each of the addresses "0" to "31". The key information is 8-bit data as shown in FIG. 5, the 7th bit indicates ON / OFF of the key (“1” indicates ON), and the 5th bit indicates accent (“1” indicates strong). ing. Further, the numerical data ND of "-6" to "+15" are written in the 0th bit to the 4th bit as shown in FIG. The sixth
As shown in the figure, negative numbers are displayed in 2's complement. Further, when the key information is (FF) _H , it indicates that nothing is done and the previous state is maintained, and when it is (00) _H , the key-off is instructed.

Similar to the tone generation mode instruction data PD (see FIG. 3), these pieces of key information are provided for 16 measures per measure for 2 measures. Further, the bass pattern PATAB is provided for each rhythm type and chord type.
It is provided for each of the normal pattern and the ending pattern.

Next, the table memory 6 shown in FIG. 1 stores a table as shown in FIG. This table has areas of addresses (0) _H to (E) _H , and a predetermined numerical value is written in each address corresponding to the tone generation channels ch0 to ch2. Here, the pronunciation channels ch0-ch2 are
It is provided in the tone generator 12 shown in FIG. 1 to create a musical tone signal with a specified pitch and tone color, and to produce a chord accompaniment. In this case, the pronunciation channel ch0 produces the lowest or root note of the chord, the channel ch2 produces the highest note, and the channel c
h1 sounds the second highest note.

Further, the addresses (0) _H to (E) _H shown in FIG. 7 correspond to the sounding mode instruction data, that is, the sounding mode instruction data PD is (0) _H , (1) _H ...
In the case of (E) _H , the addresses (0) _H , (1) _H ... (E) _H of the table memory 6 are selected. As described above, the data in the table memory 6 is uniquely selected according to the content of the tone generation mode instruction data PD. Then, the tone generation processing of each tone generation channel ch0 to ch2 is determined by the data in the table memory 6.

Here, the pronunciation mode instruction data PD and each sound channel ch
FIG. 8 shows the situation of sound generation processing in 0 to ch2.

Next, 7 in FIG. 1 is a tempo clock generator, which outputs to the CPU 2 a tempo clock TP having a constant cycle which is the basis of the tempo of the automatic performer. CPU2 is interrupted by this tempo clock TP. In this case, the tempo clock
The cycle of TP is determined according to the tempo data TD supplied from the CPU 2 via the bus line B.

A switch group 10 is composed of a rhythm selection switch, a rhythm start / stop switch, a tone color selection switch, various effect selection switches and the like (not shown), and an ending switch SWE. A tone generator 12 generates musical tones corresponding to the key performance of the player based on the key-on / key-off information issued from the CPU 2 according to the key press / release of the keyboard circuit 1, and accompaniment chords by the sound generation channels ch0 to ch2. In addition, a bass performance is performed by the sound generation channel ch3.

Further, the tone generator 12 has a percussion-type rhythm sound source and generates a rhythm sound corresponding to the selected rhythm in accordance with the tempo clock TP.

Here, the main ones of the various registers and flags in the working memory 4 described above will be described.

Flag RUN: "1" is written when running with automatic accompaniment, and "0" is written when stopped.

Register CLK: A register in which the count number of the tempo clock TP is written, and values of “0” to “15” are cyclically written for each bar.

Key code buffer KCBUF _0-2 : A register in which the key code of each key pressed is written.

Register ROOT: A 4-bit register to which root note data is written. The root data is "0", "1", ... "1"
It is data of "1" and corresponds to C sound, # sound, ... B sound.

Register TYPE: A register into which code type data is written. The chord type data is data corresponding to major M, minor m, 7th 7th, etc.

Register DT: A register in which the tone generation mode instruction data PD is written.

Register KEY _{0 to 2:} a key code buffers are provided corresponding to the sound channel ch0~ch2 tone generator 12. This register KEY ₀ ~KEY sound channel ch0~ch2 by the key code to be written in ₂ pitch of drum sounds is determined.

Flag END: This is a flag for instructing performance by the ending pattern.

Flag TEND: "1" when the ending switch SWE is operated
Is a flag that can be set.

Flag BAR: A flag indicating the progress of the bar line.

Register RHY: A register into which data indicating the rhythm type is written.

Registers BS and BASS: Registers in which key information (see FIG. 4) in the base pattern PATB is written.

Register DKC: A register used in the pitch conversion process described later.

Register OCT: A register into which the octave information shown in FIG. 4 is written.

Register TONEC and register TONEB: registers to which the tone color data shown in FIGS. 3 and 4 are written.

The above are the main registers and flags provided in the working memory 4.

(2: Operation of Embodiment) Next, the operation of this embodiment having the above configuration will be described.

Main processing In step SP1 shown in FIG. 9, initialization processing is performed, and register TEND and key code buffer KCBUF
And clear the flag RUN. Then, in step SP2, it is determined whether or not the start switch is turned on. If this determination is "YES", the process proceeds to step SP3 and the contents of the flag RUN are inverted. By the processing of steps SP2 and SP3, the flag RUN is run every time the start switch is pressed.
The contents of are reversed. Next, in step SP4, it is determined whether or not the content of the flag RUN is "1". If "NO", it means that the automatic accompaniment stop is instructed. Key off the sound generation channels ch0 to ch3 in the generator 12. If the determination in step SP4 is "YES", it means that the start of automatic accompaniment is instructed. Therefore, the process proceeds to step SP6 and the register CLK and the flags BAR, TEND and END are cleared. After the processing of steps SP5 and SP6, the process moves to step SP7 and it is determined whether or not the rhythm select switch is operated. On the other hand, if the determination in step SP2 is "NO", it means that the start switch has not been operated, so the process immediately proceeds to step SP7 without performing the above process.

If the determination in step SP7 is "YES", the data corresponding to the newly selected rhythm is written in the register RHY (step SP8), and the tone color changing process (Fig. 10) is proceeded to. However, the tone color changing process is not performed before the key is operated, and the process proceeds to step SP9 after step SP8 to determine whether or not there is a key event. Here, a key event refers to a change in key operation, and includes a key-on event from off to on and a key-off event from on to off.

On the other hand, if it is determined "NO" in step SP7, the process immediately goes to step SP9. If the determination in step SP9 is "YES", the flow proceeds to step SP10, and the key code of the key having the key-on event is stored in the key code buffers KCBUF _0-2 up to three notes with the latter priority. Next, in step SP11, the chord type and root note are detected based on the key code in the key code buffers KCBUF _0-2 , the detected chord type data is written in the register TYPE, and the root note data is written in the register ROOT. . When the processing of this step SP11 is completed, it proceeds to the tone color changing processing. On the other hand, if “NO” is determined in step SP9, step SP1
2 to determine whether the ending switch SWE has been pressed, and if "YES", proceed to step SP13 to set the flag T
Set "1" to END, then proceed to step SP14, step S
If the determination in P12 is "NO", the process immediately proceeds to step SP14.

In step SP14, processing corresponding to the operation of another switch in the switch group 10, that is, setting / changing of tempo, volume, etc. is performed.

Tone Color Changing Process Next, the tone color changing process will be described with reference to FIG.

First, in step SPa1, register RHY, TYPE, E
A code pattern PATC and a base pattern PATB (see FIGS. 3 and 4) specified by each content of ND are selected.
The register END is reset in the initial state, and is set when the processing of steps SPb8 and SPb9 shown in FIG. 11 is performed. Then, the address "-2" of the base pattern PATB is set in the register TONEB.
The tone color data at the address "-1" of the code pattern PATC is written to the register TONEC (step SPa3). Next, in step SPa4, the tone colors of the tone generation channels ch0 to ch2 are set according to the tone color data in the register TONEC, and the tone colors of the tone generation channel ch3 are set according to the tone color data in the register TONEB. When this process ends, the process returns to the main process.

Interrupt Process Next, the interrupt process will be described with reference to FIG. By the tone change processing described above, the chord pattern TONEC and the bass pattern TONEB depending on the selected rhythm, the type of chord pressed and the ending mode.
Is selected. The automatic accompaniment by these selected patterns is performed based on the tempo pulse TP shown in FIG. That is, every time the tempo pulse TP is supplied, the CPU 2 is interrupted, and the interrupt processing shown in FIG. 11 is performed. In this processing, automatic accompaniment processing such as sound generation, mute, and continuation of the previous state is performed. The interrupt process will be described below.

First, in step SPb1, it is determined whether or not the flag RUN is "1", and if "NO", it is instructed to stop the automatic accompaniment, so that no processing is performed and the process immediately returns. If the determination in step SPb1 is "YES", the process proceeds to step SPb2, and the rhythm sounding process (percussion sound) of the rhythm type designated by the rhythm data in the register RHY is performed. This pronunciation process is a tone generator
The sounding channel for the rhythm sound in 12 is used to sound the rhythm sound source at the timing indicated by the value of the register CLK. In addition, rhythm sound processing is performed according to the normal or ending pattern based on the contents of the register END. After this rhythm sound processing,
The process moves to chord processing for chord performance and bass processing for bass performance.

(A) Code processing First, in step SPc1 shown in FIG. 12, step SP
Key code buffer KCBU written in 10 (see Fig. 9)
The keycode F within _0-2 write to a low temperature in order to register KEY _0-2. Next, in step SPc2, the calculation result of (BAR × 16 + CLK) is written in the register CLK2. Since the value of the flag BAR is "0" by the processing of step SP6 at the start of automatic accompaniment, in this case, the content of the register CLK is directly written in the register CLK2. When the content of the flag BAR is "1", the content of 16 + CLK is written. The process of step SPc2 is a process of creating the number of the tone generation mode instruction data PD from the content of the register CLK.

Next, at step SPc3, it is determined whether or not the content of the register CLK2 is an even number, and if "YES", the process moves to step SPc4 and the lower 4 bits of the address "CLK2 / 2" of the code pattern PATC.
The tone generation mode instruction data PD in the bit is written in the register DT, and if "NO", the process proceeds to step SPc5 to output the tone mode instruction data in the upper 4 bits of the address "(CLK2-1) / 2" of the code pattern PATC. Write to register DT.

By the processing of the above steps SPc3 to SPc5, the tone generation mode instruction data PD of the number that matches the value of the register CLK2 is registered in the register DT.
Written in. For example, the content of register CLK2 is "3"
If so, the pronunciation mode instruction data PD _{3 in} the upper 4 bits of the address “1” is written, and if the content of the register CLK2 is “30”, the pronunciation mode instruction in the lower 4 bits of the address “15” is written. The data PD ₃₀ is written.

Next, in step SPc6, it is determined whether the tone generation mode instruction data in the register DT is (8) _H to (E) _H. This determination is a determination as to whether or not the pronunciation mode instruction data PD indicates a special process for the root note.
As shown in the figure, if it is within the above range, special processing is required. If the determination in step SPc6 is "YES", after setting the register i to 1 in step SPc7, the process proceeds to step SPc8 and it is determined whether or not the result of the operation KEYi.MOD.12 is equal to the root note. Here, the operation KEYi.MOD.12 is an operation for obtaining the remainder obtained by dividing the register KEYi by 12, and converts the key code into a numerical value of "0" to "11". Then, this calculation result is compared with the root note data (numerical values "0" to "11") written in the register ROOT in step SP11. Then, if the determination in step SPc8 is "YES", replacing the key code of the key code and the register KEY ₀ of the register KEYi proceeds to step SPc10. Step SP
If the determination at c8 is "NO", the register i is incremented at step SPc9 and the determination at step SPc8 is performed again. By the above processing, the key code of the root note having an octave relationship with the note name indicated by the root note data in the register ROOT is written in the register KEY ₀ .

After the processing of step SPc10 and if "NO" in step SPc6, the process proceeds to step SPc11, and it is instructed whether or not the sounding mode instruction data PD at that time is (F) _H , that is, "do nothing". It is determined whether or not there is.
If this determination is "YES", no sounding or muffling processing is performed and the process immediately returns. In step SPc11, click `` N
If it is determined to be "O", the register i is cleared in step SPc12, and then the process proceeds to step SPc13. Step SPc13
In FIG. 7, the data at the address of the channel number i, which is the address matching the contents of the register DT (= sound generation mode instruction data PD) in the table shown in FIG. 7, is read and written in the register DKC. In this case, since i = 0 by the processing of step SPc12, the data written in the register DKC in the first processing of step SPc13 has the same address as the tone generation mode instruction data PD in the register DT and corresponds to the tone generation channel ch0. Data to For example, “128” is written if the pronunciation mode instruction data PD is (0) _H , and “232” is written if it is (A) _H. Next, in step SPc14, it is determined whether or not the content of the register DKC is "128". If "YES", step SPc
Move to c15 and key off the sound generation channel chi. That is, in this embodiment, "128" is used as the key-off instruction data. When the processing of this step SPc15 ends,
The register i is incremented in step SPc16, and then the process returns to step SPc13 via step SPc17. The process of step SPc17 is a process of determining whether or not the value of the register i is less than 3, and becomes "YES" unless the process of step SPc16 is performed three times.

On the other hand, if “NO” in the step SPc14, the process moves to the step SPc18, the content of the register DKC is added to the value of the register KEYi, and the addition result is written in the register KC. Then, the process proceeds to step SPc19, the tone generation channel chi is keyed on by the key code in the register KC, and the process proceeds to step SPc16.

Here, the pronunciation mode according to the contents of the register DKC will be described. There are 6 data values written in the register DKC other than "128" as shown in FIG. 7, and the tone generation mode in that case is as follows.

When it is "0" When the data written to the register DKC is "0",
Register KEY to register KC by processing of register SPc18
The key code in i is written as it is. Therefore, the sound channel chi is sounded by the key code in the register KEYi.

In the case of "2" When "2" is added to the key code in the register KEYi by the processing of step SPc18, the pitch of the sound generated by the sound generation channel chi becomes a pitch raised by a whole pitch (semitone x 2).

In the case of "232" In this case, the calculation result of step SPc18 exceeds "255". That is, the key code written in the register KEYi is a key code of a key in the accompaniment tone range, and usually has a pitch of C ₃ notes or more. Then, when the added value exceeds "255", the register KC is configured with 8 bits, so the overflow amount is ignored, and as a result, the remainder obtained by subtracting "256" from the added value becomes the content of the register KC. . For example, when the key code is "60 (C ₃ notes)", the added value is "292", but the content of the register KC is "36". The value "36" is the key code of the C ₁ note as shown in FIG. That is, the C ₁ note, which is a note two octaves below the C ₃ note, is sounded from the sounding channel chi. When the contents of register DKC is "232",
2 of the sound specified by the key code in register KEYi
The sound below the octave is emitted.

In the case of “251” In this case as well, the value obtained by subtracting “256” from the added value is written in the register KC in the same manner as above. For example, if the key code is "60 (C ₃ sound)", "55 (= 311-256)" it is written. This key code "55" is a key code of G ₂ note, which is a note 4 degrees below the C ₃ note. in this way,
When the content of the register DKC is “251”, the sound 4 degrees below the sound specified by the key code in the register KC is sounded.

In the case of "255" As in the above case, the value obtained by subtracting "256" from the addition result of the register KEYi and the register DKC is written in the register KC.
For example, when the key code is "60", "59 (= 315-2
56) ”is written. This "59" is the key code of the B _2. That is, when the content of the register DKC is "255", a sound which is a semitone lower than the sound specified by the key code in the register KEYi is emitted.

In the case of "239" In this case, the processing is almost the same as the above processing, but since the numerical value is 7 larger, the generation of a sound 5 degrees above the sound two octaves below the root sound is instructed.

Then, when the above-mentioned processes (1) to (4) are performed, the sound generation process shown in FIG. In this case, as can be seen from the figures, when the pronunciation mode instruction data PD is (8) _H to (E) _H , only the root note is processed, so the root note should be assigned to the determined channel. Is advantageous in terms of processing. In this embodiment, the root note is assigned to the tone generation channel ch0 by replacing the root note data in the register KEY ₀ by the processing of steps SPc8, SPc9 and Spc10.

As described above, in step SPc15 or step SPc19, mute or sound generation processing is sequentially performed from the sound generation channel ch0. Then, when all the sound generation processing of the channels ch0 to 2 is completed, the determination at step SPc17 becomes "NO" and the routine returns, and the routine proceeds to the base processing shown in FIG.

(B) Base processing First, in step SPd1 shown in FIG. 13, register CLK2
Write the calculation result of (BAR x 16 + CLK) to. This process is similar to the process of step SPc2 described above.
Next, in step SPd2, the octave information at the address "-1" of the base pattern PATB selected in step SPa1 is written in the register OCT. And step SPd3
Address of base pattern PATB at "contents of CLK2"
Write the key information in the register BS to the register BS. Next, in step SPd4, it is detected whether the key information in the register BS is (FF) _H. Then, in the case of "YES", since "do nothing" is instructed as described above, the following processing is not performed and the process immediately returns. Meanwhile, step
If the determination of SPd4 is "NO", the process proceeds to step SPd5, and it is detected whether the key information in the register BS is (00) _H.
If this determination is "YES", the key-off is instructed as described above, so the tone generation channel ch3 is key-off (step SPd6), and then the process returns. Step SP
When the determination of d5 is "NO", the process proceeds to step SPd7 and the lower 5 bits of the register BS is written in the register DKC. This lower 5 bits of data is the numerical data ND in the key information as shown in FIG. Then, in step SPd8, "12" and the contents of the register DKC are added to the root note data in the register ROOT, and the result is written in the register BASS. Further, only the lower 5 bits of the register BASS are written in the register BASS again. That is, the upper 3 bits of the operation result written in Stepon SPd8 are cleared. The processing of the above steps SPd8 and SPd9 is 1
This is a process of calculating the algebraic sum of the value on the octave and the numerical data ND. For example, when the root data is "0 (C sound)" and the numerical data ND is "2", the calculation result is "14".
If the numerical data ND is "-2", the operation result is "10".

Next, in step SPd10, the illustrated calculation is performed,
The calculation result is written in the register BASS. This calculation converts the tone range of the key code written in the register BASS by the process of step SPd9 into the normal bass tone range. Then, in step SPd11, it is determined whether or not the flag END is "1". When the result of this determination is "NO", the sound channel ch3 is keyed on with the key code in the register BASS in step SPd13. On the other hand, when the determination in step SPd11 is "YES", that is, when the ending mode is specified, the process proceeds to step SPd12, the contents of the register OCT are multiplied by 12, and the multiplication result and the register B
Add the contents of ASS, and add this result again to register BASS
Write in. This process is a process of raising the sound indicated by the key code in the register BASS in octave units.
For example, if the content of the register OCT is "1", it increases by 1 octave, and if it is "2", it increases by 2 octaves. Then, after the processing of step SPd12, the process proceeds to step SPd13, and the tone generation channel ch3 is keyed on by the key code increased in octave units. When the process of step SPd13 is completed, the process returns to the interrupt process shown in FIG. The above is the base processing.

When the base processing is completed, the process proceeds to step SPb3 and the content of the register CLK is incremented by 1. Then, in step SPb4, it is determined whether or not the content of the register CLK is "16". If “NO”, the process returns to the main process shown in FIG. 9, and when the tempo clock TP is output again,
This interrupt processing is executed.

If the determination in step SPb4 is "YES", then step SPb5
Move to and clear register CLK. Thus register C
LK is cleared because the start timing of the next bar is set when the content of the register CLK is “16”. And
At step SPb6, the content of the flag BAR is inverted. When the content of the flag BAR is "0", it indicates that it is the first measure of the pattern data, and when it is "1", it indicates that it is the second measure. Next, in step SPb7, the flag BAR
Is "0" and the flag END is "1". If this determination is "YES", it means that the processing in the ending mode has been completed, and therefore step SPb10
At, the flag END and the flag RUN are cleared to instruct to stop the automatic accompaniment, and then the process returns to the main process.

If the determination in step SPb7 is "NO", the normal mode or ending mode is being processed, and the step SPb
The process proceeds to b8, where it is determined whether the flag TEND is "1". If the flag TEND is "1", it means that the ending mode is not yet processed, the process proceeds to step SPb9, the flag END is set to "1", the flag TEND is cleared, and the tone change processing ( The ending pattern is read out by referring to FIG. 10) and the process returns. The flag END becomes "1" after the processing of step SPb5, that is, at the start timing of the bar. This is to match the start of the ending mode with the start timing of the bar.

On the other hand, when it is determined to be "NO" in step SPb8, it means that the ending mode is not instructed, that is, the normal mode processing is continuing. Therefore, the process returns to the main process and waits for the next interrupt process.

(Comprehensive Operation Example) Next, a comprehensive operation example will be described.

FIG. 14 is a musical score showing the pronunciation states of the chord processing and the bass processing in the normal mode. Note that FIG. 14 is a diagram showing only the sounding timing when the chord is the C major, and the actual sounds are the C ₃ , E ₃ , and G ₃ sounds shown at the right end of the figure.
In addition, the notation of the bass range is one octave higher than the generated pitch.

Here, FIG. 16 (a) shows the pronunciation mode instruction data PD and the key information corresponding to FIG. As shown in FIG. 16 (a), the pronunciation mode instruction data PD _{0 at} the beginning of the first measure is (1)
_Since it is _H , key-on of tone generation channels ch0 to ch2 is instructed (see FIG. 8). Then, since the next note mode instruction data PD ₁ is in the (0) _H, key-off tone generation channel ch0~ch2 In this timing is instructed. Since the next sound generation mode instruction data PD ₂ and PD ₃ are both (F) _H , the mute state is continued. As a result, the first chord is sounded at the timing of the eighth note, and the eighth rest is subsequently played. Then, after that, by similarly performing the processing according to the contents of the pronunciation mode instruction data PD,
The chord performance shown in Fig. 14 is performed. For bass performance, the first key information is (80) _H ,
Here, the key-on is instructed and "0" is instructed as the numerical data ND. As a result, the C ₁ sound is produced. Then, since the key information at the next timing is (00) _H , the C ₁ sound is muted at this timing. Since the next two pieces of key information are (FF) _H , the mute state is continued. As a result, the C ₁ note is produced at the timing of the eighth note, followed by the eighth rest. After that, bass performance is performed in the same manner. in this case,
Key information for the 3rd beat of measures 1 and 2 (84) _H indicates the pronunciation of the E ₁ note, and key information for the 4th beat of measures 1 and 2 (87)
_H produces G ₁ sound.

Next, FIG. 15 is a score showing an example of performance in the ending mode. The pronunciation mode instruction data and key information corresponding to this performance are shown in FIG. The performance mode instruction data PD shown in this figure is set in the ending mode (flag EN
When D is "1"), it is selected in step SPa1. Since the first tone generation mode instruction data PD ₀ is (A) _H , only the C ₁ note which is the root note two octaves below is keyed on. Since the next sound generation mode instruction data PD ₁ and PD ₂ are (F) _H , the above sound is continuously sounded. Then, since the next sound generation mode instruction data PD ₃ is (0) _H , the above sound is muted at this point, whereby the C ₁ sound is sounded at the length of a quarter note. The processing at the first beat and the third beat of the second measure is the same as above. Further, since the sounding mode instruction data is (B) _H in the second beat of the second bar, the G ₁ sound which is a sound 5 degrees above the root sound two octaves below is sounded. By the above processing, the sound originally supposed to be produced in the chord range is produced in the bass range. Therefore, the pitch actually pronounced is
It is 2 octaves below the figure.

On the other hand, the key information for controlling the bass performance does not include the information for moving the range, but in the ending mode, the range is raised by the processing of step SPd12 shown in FIG. Therefore, if the octave information of the bass pattern PATB (see Fig. 4) selected at this time is "2", the actually sounded tone is a tone two octaves higher than the pitch shown in Fig. 15. It becomes high. As a result, a sound that should normally be produced in the bass region is produced in the chord region.

As described above, in the ending mode, the tone generation areas of the chord accompaniment process and the bass accompaniment process are switched.

In the above embodiment, the tone generation areas are exchanged in the ending mode, but they may be exchanged in the fill-in mode.

[Advantages of the Invention] As described above, according to the automatic accompaniment apparatus of claim 1 of the present application, since the automatic accompaniment is performed in the range specified by the octave information, it is possible to play a variety of accompaniment performances. it can. Further, according to the automatic accompaniment apparatus of claim 2, since the tone color information is read out together with the octave information and the automatic tone is performed with the designated tone color in the designated tone range, more effective accompaniment can be performed. it can. Further, according to the automatic accompaniment apparatus of the third aspect, since the automatic accompaniment is performed in the musical range corresponding to the designated performance mode, more effective accompaniment can be performed. Further, according to the automatic accompaniment apparatus of claim 4, since the automatic accompaniment is performed in the musical range corresponding to the ending time, more effective accompaniment can be performed. According to the automatic accompaniment apparatus of the fifth aspect, since the automatic accompaniment is performed in the range corresponding to the fill-in, more effective accompaniment can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention, FIG. 2 is a diagram showing a relationship between keys and key codes in the embodiment, and FIG. 3 is a code pattern PATC in the embodiment. 4 is a format diagram showing the base pattern PATB in the embodiment, FIG. 5 is a diagram showing the contents of the key information shown in FIG. 4, and FIG. 6 is a part of the key information. FIG. 7 is a diagram showing the numerical data ND constituting the above, FIG. 7 is a diagram showing the data in the table memory 6, and FIG. 8 is a diagram showing the relationship between the content of the pronunciation mode instruction data PD and the mode of actual pronunciation control 9 is a flow chart showing the main processing of the same embodiment, FIG. 10 is a flow chart showing the tone color changing processing, FIG. 11 is a flow chart showing the interruption processing, and FIG. 12 is a chart showing the automatic accompaniment. Flowchart showing chord processing for chord pronunciation, No. 1 Fig. 3 is a flowchart showing bass processing for performing bass sounding during automatic accompaniment, Fig. 14 is a score showing an example of automatic performance in the normal mode, Fig. 15 is a score showing an example of automatic performance in the ending mode, FIG. 16 is a diagram showing sound generation mode instruction data and key information corresponding to the performance examples shown in FIGS. 14 and 15. 2 ... CPU, 3 ... program memory, 4 ... working memory, 4 ... pattern memory, 6 ... table memory, 7 ... tempo clock generator 7, 10 ... switch group, 12 ... tone generator, SWE …… Ending switch.

Claims (5)

[Claims] 1. Storage means for storing a plurality of pitch information and one octave information corresponding to a performance order as one accompaniment pattern, and first reading means for reading the octave information from the storage means. Second read means for sequentially reading the pitch information from the storage means as the accompaniment progresses; and octave information read from the first read means for the pitch information read from the second read means. An automatic accompaniment apparatus comprising: a conversion unit that converts the pitch information of a set pitch range; and a tone generation unit that generates a musical tone corresponding to the pitch information converted by the conversion unit. 2. A storage unit for storing a plurality of accompaniment patterns by associating a plurality of pitch information in accordance with a performance order with one octave information and tone color information to form one accompaniment pattern, and the accompaniment pattern. Accompaniment pattern selecting means for selecting, first reading means for reading octave information and tone color information corresponding to the accompaniment pattern selected by the accompaniment pattern selecting means from the storage means, and the accompaniment selected by the accompaniment pattern selecting means Second reading means for sequentially reading the pitch information corresponding to the pattern from the storage means in accordance with the progress of accompaniment, and the octave for reading the pitch information read from the second reading means from the first reading means. Conversion means for converting to pitch information of a range set by information, and the conversion means Automatic accompaniment apparatus characterized by comprising a music generation means for generating a musical tone corresponding to the read-out tone color information and the converted tone pitch information from the first read means I. 3. Storage means for storing a plurality of accompaniment patterns in association with a plurality of performance modes by associating a plurality of pitch information and one octave information in accordance with the performance order into one accompaniment pattern. A performance mode selecting means for selecting a performance mode, and octave information corresponding to the performance mode selected by the performance mode selecting means from the storage means
Reading means, a second reading means for sequentially reading the pitch information corresponding to the accompaniment pattern selected by the performance mode selecting means from the storage means in accordance with the progress of the accompaniment, and read from the second reading means. Conversion means for converting the pitch information into pitch information of a range set by the octave information read from the first reading means, and a musical sound for generating a musical tone corresponding to the pitch information converted by the conversion means. An automatic accompaniment apparatus comprising: a generation unit. 4. The automatic accompaniment apparatus according to claim 3, wherein the performance mode selection means is an ending instruction means for instructing ending. 5. The automatic accompaniment apparatus according to claim 3, wherein the performance mode selecting means is fill-in instructing means for instructing fill-in.