JP2713053B2 - Code display of electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument having a chord sequencer and displaying a chord progression during a performance.

[0002]

2. Description of the Related Art Conventionally, there is an electronic musical instrument which stores chord progression data of a desired music and reads it out to perform automatic accompaniment. Some of such electronic musical instruments have a function of sequentially displaying the chords (chords) of the music being played to the player (for example, Japanese Patent Application Laid-Open No.
No. 47097).

[0003]

However, in the above-mentioned electronic musical instrument, since the code of the displayed chord is only one chord currently being played, it is difficult for the player to grasp the progress of the chord. There was a problem. in this case,
For example, when the accompaniment is allowed to be performed by an automatic accompaniment apparatus, and the player performs an ad-lib performance (improvisation) for the accompaniment, the melody to be played next is not known. I didn't know what to do.

[0004] Further, in the above-mentioned conventional electronic musical instrument, there is also a problem that it is difficult to know how long the displayed chord is continuously played. In this case, it is difficult to grasp the chord progression or chord change timing, and it has been difficult to perform an ad-lib performance of a melody conscious of a chord change in advance.

The present invention has been made in view of the above circumstances, and has as its object to allow a player to easily grasp the progress of a chord.

[0006]

According to a first aspect of the present invention, there is provided a chord display device for an electronic musical instrument according to the present invention.
Storage means for sequentially storing a plurality of chord data and time data indicating the playing duration of each chord data; and sequentially storing the chord data and the time data from the storage means in accordance with the progress of the music to be played. Reading means for reading, first display means for displaying chords sequentially played based on the code data read from the storage means, and playing of each chord based on time data read from the storage means. Second display means for displaying the duration at the same time as the content of the code. According to a second aspect of the present invention, in the chord display device for an electronic musical instrument according to the first aspect, a bar line timing determined according to a chord progression state .
And the duration of the performance to the next chord to be played
And measure line detection means for detecting whether the end timing matching, and the measure line timing and the end timing
When a match is detected, a bar line display means for displaying a bar line in addition to the contents of the chord to be played is further provided. According to a third aspect of the present invention, in the electronic musical instrument code display device according to the first aspect, the content of the time data is displayed as a musical note code corresponding to the number of beats corresponding to the playing duration of the code. It is characterized by doing so.

[0007]

According to the above arrangement, at least the contents of the chords to be currently played and the chord to be played next are simultaneously displayed, and the playing duration of each chord is also displayed. Can understand. Also, chord
The bar timing determined by the line status and the next performance
The end timing of the playing duration up to the chord to be
Can be detected and a bar line can be displayed.
In this way, by sequentially displaying various data relating to the progression of chords, it is possible for the player to more easily grasp the progression status of chords.

[0008]

【Example】

(A) Configuration of Embodiment FIG. 1 is a block diagram schematically showing an overall configuration of an electronic musical instrument according to the present invention. In this figure, an electronic musical instrument includes various switches 1 provided on a main body thereof, a switch detection circuit 2 for detecting an operation state thereof, a ROM 3 storing a note conversion table and various control programs to be described later, and various data and data to be described later. RAM 4, in which registers and the like are stored,
Central processing unit (CPU) 5, timer 6, display circuit 7,
A sound source circuit 8 and a sound system 9 are provided, and data exchange between them is performed via a bus B.

In the above configuration, the display circuit 7 includes a display (for example, a liquid crystal display LC) provided on the electronic musical instrument main body.
D) and its driving circuit, and controls the display contents. Further, the tone generator circuit 8 generates an automatic accompaniment sound signal based on the stored automatic accompaniment data,
This sound is generated by a sound system 9 including an amplifier and a speaker.

In this embodiment, for example, the chord progression as shown in FIG. 2 and the present and next performance chords are simultaneously displayed as shown in FIG. Here, the chord currently being played is “C”, and the chord to be played next is “Am”.
/ C ", for each of them, the time at which the chord is played is displayed on the left shoulder as a note code.
In this display example, chord C is a quarter note, chord A
m / C means that each time a half note is played. When this play code C is completed, the code Dm ₇ to be played to the code Am / C to be currently played next is displayed. In this example, the code Dm ₇ is supposed to be performing period of a quarter note. Further, “MEAS 024” in this display example means that the number of the currently played bar is “024”, while “PTN 003” indicates that the pattern number of the current accompaniment is “003”. ". Furthermore,
In this embodiment, the bar interposed between the cord Am / C and Dm ₇ are also displayed.

Next, the data format of various data stored in the RAM 4 will be described. Here, FIG.
As shown in the figure, three types of data storage areas of a code track, a pattern track, and pattern data are set. In the chord track, for example, for a chord pattern as shown in FIG. 2, chord data indicating a root (chord) and a chord type of each chord, and duration data indicating a time between chords are alternately stored. The duration data indicates the time between a certain chord and the next chord in beat units. In the present embodiment, the code data is programmed so as to always change at the bar line timing. Therefore, even when the same code continues beyond the bar line, the code data is once separated at the timing of the bar line, and the code data of the same code is stored again. The code track also stores on-base data indicating on-base. For example, the code Dm ₇ the bass of G on the base performance is thereby also be relative.

In the next pattern track, pattern number data (described later) for designating an accompaniment pattern to be played by a number in accordance with the progress of the music, and a measure (Measure)
Interval data is stored alternately. This measure interval data stores the interval from the current pattern number to the next pattern number in bar units. A plurality of types of accompaniment pattern data are stored in the pattern data area, and each type of accompaniment pattern data is composed of three parts of pattern data: a chord backing pattern, a base pattern, and a rhythm pattern. Each pattern data is composed of note event data indicating a musical tone to be actually produced and timing data indicating a timing within one bar at which the event is to be generated. The pattern number data in the pattern track is for selecting and specifying one of a plurality of types of accompaniment patterns.

(B) Operation of the Embodiment Next, the operation of the embodiment of the present invention will be described with reference to the flowcharts shown in FIGS. First, when the automatic performance is started, the main routine process of the present embodiment shown in FIG. 5 is started, and in step SA1, various registers are initialized. Here, a register CL for storing the count value of the clock timing in the bar
K, a register BEAT for storing a beat count value, a register MEAS for storing a bar count value, a register DUR for storing a beat count value until the next chord change, and a bar until the next chord pattern change. The value of the register MINT storing the accumulated value of the number is reset to zero. At the same time, the stored value of the bar BAR for bar line detection is initialized to “3”, the stored value of the register A is set to “23”, and the stored value of the register B is initialized to “3”. Here, the register BAR is actually used to detect the position of the bar line by storing a value indicating the current beat position in the bar. The registers A and B are used to specify three types of processing timings in timer interrupt processing described later. That is, the register A counts up the value for each beat, and changes between "0" and "23". The register B counts up the value for each bar, and changes between "0" and "3".

Next, the timer interrupt processing shown in FIG. 6 will be described. In this processing, three types of processing timings 1, 2, and 3 required for the processing of the present embodiment are specified. still,
In this embodiment, the timer interrupt per quarter note is set to 2
It is set to four times. When the timer interrupt occurs, a processing timing 3 is specified in step SB1. Next, in step SB2, it is determined whether the value of the register A is equal to "23". If not equal, the value of the register A is incremented by "+1" (step SB3), and the process returns to the main routine.

On the other hand, when the value of the register A is equal to "23", the processing timing 1
Is specified. In the next step SB5, the value of the register A is reset to “0”, and then it is determined whether or not the value of the register B is equal to “3” (step SB6). If not equal, in step SB7, the value of the register B is incremented by "+1", and thereafter, the process returns to the main routine. On the other hand, when the value of the register B is equal to "3", the process timing 2 is designated in step SB8. Thereafter, in step SB9, the value of the register B is reset to "0", and the process returns to the main routine.

According to the above processing, in the case of four beats per bar, during the period of one bar, the processing timing 3 is specified 96 times in total, the processing timing 1 is specified four times, and the processing timing 2 is specified once. Will be done. With reference to these three types of processing timing,
A code track process, a pattern track process, and a pattern data read process are respectively performed.

Next, in step SA2 in FIG. 5, it is determined whether or not the current timing is the processing timing 1. If the result of the determination is "NO", the processing jumps to step SA6. On the other hand, when the determination result is “Y
If "ES", the flow advances to the next Step SA3 to execute a subroutine process relating to a code track process described later. Thereafter, in step SA4, it is determined whether or not the current timing is equal to the processing timing 2.
If they are not equal, the process jumps to step SA6. On the other hand, if it is determined that they are equal, the process proceeds to step SA5 to execute a subroutine process relating to a pattern track process described later. Thereafter, in step SA6, it is determined whether or not the current timing is equal to the processing timing 3. If they are not equal, the process returns to step SA2. If they are equal, the process proceeds to step SA7 to execute a pattern data reading process described later.

In this way, after the initial setting process in step SA1, the processes in steps SA2 to SA7 are repeatedly executed.

Next, the contents of the subroutine of the code track processing to be executed in step SA3 of FIG. 5 will be described with reference to the flowcharts shown in FIGS.

First, in step SC1 shown in FIG. 7, it is determined whether or not the storage value of the register BAR used for bar detection is "3". If the result of the determination is "YES", the value of the register BAR is reset to "0" (step SC2), while if the result of the determination is "NO", the stored value is "+1". Increment (SC3). Next, the process proceeds to step SC4 to determine whether or not the stored value of the register BEAT is equal to the value of the register DUR. If they are not equal, this code track processing is not performed, so that the register BEA
The stored value of T is incremented by “+1” (step S
After C5), the process returns to the main routine. On the other hand, if the two are equal, the process proceeds to step SC6, where the code data stored in the code track is read, the route data among them is stored in the register ROOT, and the code type data is stored in the register TYPE. In step SC7, the next data stored in the storage area next to the code data in the code track is read.

Next, in step SC8, it is determined whether or not the data read from the code track is on-base data. If it is not on-base data, that is, if it is duration data, step S
Proceeding to C9, a value designating that it is not on-base is stored in the register BASS.
Jump to On the other hand, if the read data is on-base data, the process proceeds to step SC10, and a value designating on-base is stored in the register BASS. In the next step SC11, the next data, that is,
Read the duration data from the code track.
Further, in step SC12, the duration data read as described above is stored in the register DUR.

By the above steps SC6 to SC12,
Various data relating to the chord to be currently played are read out. Thereafter, in step SC13, the stored value of the register BEAT for counting the number of beats is set to "0".
Reset to. In step SC14, the R
Advance the value of the read pointer set in AM4,
The designated position (that is, designated address) of the pointer is stored.

Next, in step SC15, the next chord data corresponding to the chord to be played next is read from the chord track, and the root data thereof is stored in the register NROOT, and the chord type data is stored in the register NTTYPE. Remember. In step SC16, the data stored in the storage area next to the code data is read from the code track.

Subsequently, in step SC17 shown in FIG. 8, it is determined whether or not the read data is on-base data. If it is not on-base data, that is, if it is duration data, a value designating that it is not on-base is stored in the register NBASS. On the other hand, if the read data is on-base data, the on-base data is stored in the register NBAS.
Stored in S (step SC19). Next, the data stored in the storage area next to the on-base data, that is,
The duration data is read from the code track (step SC20). The duration data thus read is stored in the register NDUR (step SC21).

Through the processing of steps SC15 to SC21, various data relating to the chord to be played next are read. Thereafter, the pointer is returned to the position stored in step SC22. Next, step S
In C23, it is determined whether or not BAR + DUR = 4, that is, whether or not the next chord change timing is a bar line timing. If this determination result is “NO”,
Since it is not necessary to display the bar line on the display, the bar line display is erased (step SC24), while “YE” is displayed.
In the case of "S", a bar line is displayed (step SC2).
5).

Next, at step SC26, the register R
Based on the stored contents of OOT, TYPE and BASS, the code of the chord to be currently played is displayed on the display, and based on the stored contents of the register DUR, a note indicating the time corresponding to the performance period is displayed. In this way, the display relating to the chord to be currently played is performed.

Next, at step SC27, the register N
The code of the chord to be played next is displayed on the display based on the stored contents of ROOT, NTTYPE and NBASS, and a note indicating the time corresponding to the performance period is displayed based on the stored contents of the register NDUR.
In this way, the display relating to the chord to be played next is performed. Thereafter, the process returns to the main routine.

Next, the contents of the subroutine of the pattern track processing will be described with reference to the flowchart shown in FIG.

First, in step SD1, it is determined whether or not the stored value of the register MEAS is equal to the stored value of the register MINT. If they are not the same, the current timing is not the timing of the accompaniment pattern change, and the process jumps to step SD8. On the other hand, when both are equal, the present time is the timing of the accompaniment pattern change, and the process proceeds to step SD2.
The pattern number data is read from the pattern track and stored in the register PTN.

Next, in step SD3, the data stored in the storage area next to the pattern number data is read from the pattern track. In the next step SD4, it is determined whether or not the read data is end data. If it is end data, a flag "1" is set in the register END, and then the process jumps to step SD8. On the other hand, if the read data is not end data, that is, if it is major interval data, the value of the major interval data is added to the value currently stored in the register MINT and stored in the register MINT. Fix (step SD6). Thereafter, in step SD7, the read pointer is advanced.

In the next step SD8, the value of the register MEAS for counting the number of measures is incremented by "+1".
Then, the bar number and the pattern number displayed on the display are changed according to the stored contents of the MEAS. Thereafter, the process returns to the main routine.

Next, the contents of the subroutine of the pattern data reading process will be described with reference to FIG.

First, in step SE1, chord backing, bass and rhythm pattern data relating to the accompaniment pattern specified by the register PTN are read out based on CLK, and these are read out from the registers ROOT and TYP.
Note conversion is performed in accordance with the stored values of E and BASS, and output to the tone generator 8. In this case, data conversion is performed with reference to a predetermined note conversion table stored in the ROM 3, but in this embodiment, rhythm is not converted. Regarding such note conversion technology,
This is described in detail in Japanese Patent Application No. Hei 4-20191 filed earlier by the present applicant.

Next, in step SE2, it is determined whether or not the stored value of the register CLK is "95" indicating the timing at the end of one bar. When the determination result is "N
In the case of "O", the value stored in the register CLK is incremented by "+1", and then the process returns to the main routine.
On the other hand, if the result of the determination is "YES", then step SE
In step 4, it is determined whether the value of the end flag END is “0”. If it is not "0", that is, if it is "1" which declares the end timing of the bar, the automatic performance processing is ended. On the other hand, when the value of the end flag END is “0”, the register CLK
Is reset to "0" (step SE5), and the process returns to the main routine.

It should be noted that the present invention is not limited to the case where the performance data is read out, but is also applicable to the case where the performance data of another part is written while the code data is being read. Also, the number of chords displayed at the same time is not limited to the current and next chords played,
A larger number of codes may be displayed simultaneously. Further, the display format of the playing time of the chord is not only a musical note as shown in the present embodiment but also a digital numerical display or a display method of changing the display length of the bar in an analog manner. In particular, this performance time data
It is not limited to the one representing the time to the next chord. For example, the timing at which a chord change is performed in a bar is stored in advance, and the chord duration is calculated based on the timing data. May be displayed.

[0036]

As described above, the chord display device for an electronic musical instrument according to the present invention sequentially stores a plurality of chord data in accordance with a preset chord progression , and simultaneously stores each chord data.
Record the time data indicating the playing time of the play data.
Storage means and, according to the progress of the music being played,
Read the code data and the time data sequentially
And the code data read from the storage means.
First display means for displaying chords played sequentially on the basis of
Based on the time data read from the storage means
The duration of each chord at the same time
Having and a second display means for displaying, to the player a chord progression, an effect that can be very easily understood. Also, along with the contents of each chord ,
And even detect and display lines ,
The effect that the chord progression can be more easily grasped can also be obtained. If the playing duration of the chord is displayed in the form of a note code, the effect that the player can effectively grasp the playing duration with a smaller display area can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of an electronic musical instrument including a chord display device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of chord progression used in an embodiment of the present invention.

FIG. 3 is a diagram illustrating an example of display contents of chord progression information in the present embodiment.

FIG. 4 is a diagram schematically showing a data format of data stored in a storage area set in a RAM 4 shown in FIG.

FIG. 5 is a flowchart showing the contents of a main routine of software corresponding to the operation of the embodiment.

FIG. 6 is a flowchart illustrating the contents of a timer interrupt process according to the present embodiment.

FIG. 7 is a flowchart showing a part of the contents of a code track process used in the embodiment.

FIG. 8 is a flowchart showing processing contents subsequent to the processing shown in FIG. 7;

FIG. 9 is a flowchart showing the contents of a pattern track process used in the embodiment.

FIG. 10 is a flowchart showing the contents of a pattern data reading process used in the present embodiment.

[Description of Signs] 1 Various switches 2 Switch detection circuit 3 Read only memory (ROM) 4 Random access memory (RAM) 5 Central processing unit (CPU) 6 Timer 7 Display circuit 8 Sound source circuit 9 Sound system

Claims (3)

(57) [Claims] 1. A storage means for sequentially storing a plurality of chord data in accordance with a preset chord progression, and for storing time data indicating a performance continuation time of each chord data;
Reading means for sequentially reading the code data and the time data from the storage means in accordance with the progress of the music being played;
First display means for displaying chords sequentially played based on the chord data read from the storage means, and playing time of each chord based on the time data read from the storage means; A code display device for an electronic musical instrument, comprising: a second display means for displaying simultaneously with the contents of the electronic musical instrument. 2. A bar tie determined according to a chord progression state.
Ming and continue playing until the chord to be played next
And measure line detection means and an end timing between it is detected whether or not the match, the measure line timing and the end timing
2. A bar code display for an electronic musical instrument according to claim 1, further comprising bar line display means for displaying a bar line in addition to the content of the chord to be played when a match with the chord is detected. Display device. 3. The code display device for an electronic musical instrument according to claim 1, wherein the content of said time data is displayed as a note code corresponding to the number of beats corresponding to the playing duration of the chord.