JP2833229B2 - Automatic accompaniment device for electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, from a plurality of performance operators
By play chords means and chord detection means such as a keyboard made
The present invention relates to an automatic accompaniment device for an electronic musical instrument that automatically generates an accompaniment sound in accordance with a designated chord.

[0002]

2. Description of the Related Art Conventionally, this type of apparatus is disclosed in, for example,
As shown in US Pat.
For each accompaniment style such as rock, a plurality of sets of accompaniment sound data strings are stored in an accompaniment sound memory on the basis of a predetermined chord type and a predetermined chord root, and one of the plurality of sets of accompaniment sound data strings is stored. The read-out accompaniment sound data is sequentially converted in accordance with the passage of time, and the read-out accompaniment sound data is converted in accordance with the type and root of the chord played by the chord playing means such as a keyboard, and the accompaniment corresponding to the converted accompaniment sound data is performed. A sound signal is generated.

[0003]

However, in the conventional apparatus configured as described above, the accompaniment sound data stored in the accompaniment sound memory always includes the type and root of the chord played by the chord playing means. Since the sound is converted in accordance with the sound, the flow of a series of accompaniment sounds of the accompaniment sound based on the accompaniment sound data sequence cannot be maintained at all. That is, in the accompaniment sound data sequence, an accompaniment sound data group for generating a series of accompaniment sounds close to the melody line is prepared, and the flow of the series of accompaniment sounds based on the accompaniment sound data group is faithfully performed. Although there are cases where it is desired to reproduce, even in this case, as described above, the accompaniment sound sequence changes up and down by a semitone depending on the type of the performance chord, so that the flow of the accompaniment sound is disturbed. . SUMMARY OF THE INVENTION The present invention has been made to address the above-described problem. It is an object of the present invention to insert data for inhibiting the conversion according to the type of the performance chord at a desired position in an accompaniment sound data string, and to provide an accompaniment sound data group. To provide an automatic accompaniment device for an electronic musical instrument capable of faithfully reproducing the flow of a series of accompaniment sounds.

[0004]

In order to achieve the above object, the structural feature of the present invention according to claim 1 is that an accompaniment tone name is expressed based on a predetermined chord type and a predetermined chord root. and sequentially reading the read means and the plurality of sets stored accompaniment sound memory, one of said plurality of sets of accompaniment data sequence in accordance with the elapsed time with the lapse plurality of accompaniment sound data time sum
Chord designating means for designating a sound type and a root note; converting means for converting the read respective accompaniment sound data according to the designated chord type and root note; and the converted accompaniment sounds An electronic musical instrument automatic accompaniment apparatus comprising: an accompaniment sound signal generating means for generating an accompaniment sound signal in accordance with data;
Conversion prohibited data indicating that conversion of performance data is prohibited
Is included in a part of the accompaniment sound data sequence.
And controlling the conversion means when the conversion prohibition data is read by the reading means, and controlling the specified chord.
The conversion of the read-out accompaniment sound data by type is prohibited.
In addition, a conversion prohibiting means for allowing only the conversion by the designated chord root is provided. Further, in claim 2
A structural feature of the invention is that the conversion prohibition data
The conversion of the read accompaniment sound data is performed over a specific section.
Data that prohibits
Inhibit means when the conversion inhibit data is read out.
Over a specific section represented by the conversion prohibition data
The conversion is prohibited by the specified chord type and the same
Configuration to allow only the conversion by the chord root
And there.

[0005] Further , according to the third aspect of the present invention,
A feature is a chord indicating means of the invention according to claim 1 or 2.
To play chords
Chord playing means, and a chord played by the chord playing means.
And a chord detecting means for detecting the sound type and the root sound.
That is. Further, in the structure of the invention according to claim 4,
The characteristic feature of the present invention is that the conversion means of the invention according to claim 1 or 2 is adapted to convert the accompaniment sound data representing the accompaniment sound having a specific pitch relationship to the specified chord root sound into the specified sum. /> Increase or decrease by an amount corresponding to the semitone interval according to the sound type, and change the accompaniment sound data by an amount corresponding to the interval between the designated chord root and the reference chord root of the accompaniment sound data. It is constituted by means for shifting.

[0006] Further, in the structure of the invention according to claim 5,
Wherein, said the arrangement of claim 1 or 2 in accordance with the invention, furthermore, by including the chord type data representing a chord type the accompaniment sound data with the converted prohibited data in the accompaniment sound data string is a reference In addition, additional sound data representing an additional sound to the melody sound according to the pitch of the melody sound played by the melody playing means, the specified chord root sound, and the specified chord type. And an additional sound data generating means for controlling the generation of the additional sound signal by outputting the additional sound data to the accompaniment sound signal generating means, and a conversion prohibiting means for prohibiting the conversion by the specified chord type. in response to said chord type represented by chord type data in the accompaniment sound data string in place of the chord type the instructed to control the additional sound data generating means when that In providing the chord type substitution means for forming a Heating in data.

[0007]

According to the first aspect of the present invention, there is provided:
In the invention according to, it includes the conversion prohibition data in part of the plurality of sets of accompaniment data string stored in the accompaniment sound memory, when the conversion prohibition data is read by the reading means, converts prohibiting means controls the conversion means, converting means, the accompaniment sound data read out from the accompaniment tone memory to convert only the root of a chord designated by the chord instruction means. In this case, the conversion prohibited data is, for example,
The read accompaniment sound, for example, as in the invention according to claim 2.
Indicates that data conversion is prohibited over a specific section
The conversion prohibition means is a conversion prohibition data.
The specified sum over a specific section represented by
Forbids conversion by sound type and changes to the specified chord root
Only the conversion by Also, the chord type and root
Of the chord detection, for example, as in the invention according to claim 3,
The output means generates a chord based on the chord played by the chord playing means.
This is done by detecting the type of sound and the root note. Ma
Also, the accompaniment sound data is formed based on a predetermined chord type and a predetermined chord root, and
As in the invention according to Motomeko 4, the finger the accompaniment sound data
Since a shift by an amount corresponding to the distance between the chord root as a reference for the accompaniment sound data and chord root indicated, the accompaniment tone signal generating circuit, said direct the accompaniment tone signal corresponding to the accompaniment sound data A simple shift (transposition) occurs according to the root of the shifted chord. When the conversion prohibition data is not read from the accompaniment sound memory, the conversion means outputs the accompaniment sound data read from the accompaniment sound memory to the chord instruction means.
Is converted according to the type of chord and the root sound indicated by . In this case, conversion means, for example, as in the invention according to claim 4, the accompaniment sound data representing the accompaniment sounds in a specific interval relationship relative to root of the indicated chord being the indication
In accordance with the chord type, the pitch is raised and lowered by an amount corresponding to the semitone interval, and the accompaniment sound data is instructed as described above.
The chord is shifted according to the root chord, and the accompaniment sound signal generating means generates an accompaniment sound signal corresponding to the specified chord type and root.

[0008] Consequently, the invention according to the claims 1 to 4, in the accompaniment sound data string, are prepared accompaniment sound data group for generating a series of accompaniment sounds as close to the melody line With this arrangement, the flow of a series of accompaniment sounds based on the accompaniment sound data group can be faithfully reproduced, and the automatic accompaniment apparatus can be provided with a new function.

Further, in the invention described in claim 5 configured as described above, further, in the accompaniment sound data string, a sum based on the accompaniment sound together with the conversion prohibition data is used. The chord type data representing the chord type is included, and when the conversion prohibition means prohibits the conversion by the specified chord type, the chord type replacement means controls the additional sound data generation means, the additional sound data generating means, of melody sound was played by the melody means the pitch, the finger
The additional sound data representing the additional sound to the melody sound is formed according to the root sound of the indicated chord and the chord type data in the accompaniment sound data string, and the accompaniment sound signal generating means corresponds to the additional sound data. Generate additional sound signal. Further, when the conversion inhibiting means does not prohibit the conversion by the indicated chord type, additional sound data generating means, the melody tone that is played by melody means pitch, the finger
An additional sound data representing an additional sound to the melody sound is formed in accordance with a root and a type of the indicated chord, and an accompaniment sound signal generating means generates an additional sound signal corresponding to the additional sound data.

As a result, according to the fifth aspect of the present invention, in addition to the effects of the first to fourth aspects, the additional sound to the melody sound can be faithfully reproduced according to the flow of the series of accompaniment sounds. The additional sound can be made suitable for the melody sound and the accompaniment sound.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an electronic musical instrument according to the present invention. This electronic musical instrument includes a left keyboard 11, a right keyboard 12, and an operation panel 20. The left keyboard 11 includes a plurality of keys and is used for playing a chord. The right keyboard 12 also includes a plurality of keys, and is used for melody performance. Pressing and releasing of these keys is detected by opening and closing a plurality of key switches provided for each key in the key press detection circuit 13.

The operation panel 20 includes a plurality of tone color selection switch groups 21, a plurality of accompaniment style switch groups 22, a tempo volume 23, a harmony selection switch 24, a start switch 25, and a stop switch 26.

The tone selection switch group 21 includes a violin,
Each switch corresponds to a plurality of tones such as a guitar and a piano, and each switch designates one of the plurality of tones for a melody tone. The accompaniment style switch group 22 corresponds to each of a plurality of accompaniment styles such as march and rock, and each switch designates one of the plurality of accompaniment styles. The tempo volume 23 sets the tempo of the automatic accompaniment.
The harmony selection switch 24 selects addition of a harmony sound to the melody. Start switch 25
Indicates the start of automatic accompaniment, and the stop switch 26
Indicates the stop of the accompaniment. The operation of these switches 21 to 26 is detected by the switch operation detection circuit 20.

The key press detection circuit 13 and the switch operation detection circuit 20a are connected to a bus 30. The bus 30 includes a tone signal forming circuit 40 and a microcomputer unit 5.
0 and the accompaniment data memory 60 are connected. The tone signal forming circuit 40 has a plurality of tone signal forming channels. Each tone signal forming channel is based on control data such as a key code KC and a key-on signal KON supplied from the microcomputer unit 50 via the bus 30. Melody sound signal of pitch change of piano, clarinet, etc.
In addition to forming an additional sound signal and an accompaniment sound signal, it forms and outputs a percussion instrument sound signal such as a drum and a cymbal (defined in this case as a part of the accompaniment sound signal). The output of the tone signal forming circuit 40 is supplied to a speaker 42 via an amplifier 41.
It is connected to the.

The microcomputer unit 50 includes a bus 30
Memory 51, tempo clock generator 52, CPU 53 and working memory 5 connected to
Consists of four. The program memory 51 is constituted by a ROM and stores programs corresponding to the flowcharts shown in FIGS. The tempo clock generator 52 is composed of a variable frequency oscillator.
A tempo clock signal is generated at a period corresponding to the tempo control data supplied through the CPU. The cycle of the tempo clock signal corresponds to the timing at which a quarter note is divided into 24. After turning on the power switch (not shown), the CPU 53 continues to execute the “main program” corresponding to the flowchart shown in FIG. 8, and interrupts the execution of the program due to the arrival of the tempo clock signal. The interrupt program corresponding to the flowchart shown is executed by interruption. The working memory 54 is constituted by a RAM, and temporarily stores data necessary for executing the program.

The accompaniment data memory 60 comprises a ROM, a harmonic table HMT and a note conversion table NCT.
And a performance data table PLDT, and an area for storing other accompaniment data. The harmony table HMT has a style number STLN as shown in FIG.
For each accompaniment style specified by, the chord type HCTP,
It stores the harmonic data HMT (STLN, HCTP, DG, i) read out according to the frequency DG and the type i of the additional sound. In this case, the chord type HCTP is used for reading the harmony data, and the major M, the minor m, and the seventh 7th are used.
Represents the type of chord, such as The frequency DG represents the number of semitone intervals from the root of the chord, and the type i of the additional sound indicates a first additional sound by "0" and a second additional sound by "1". The harmony data HMT (STLN, HCTP, DG, i) indicates the number of semitone intervals from the highest melody note to the bottom. The note conversion table NCT has a style number ST as shown in FIG.
Chord type CTP for each accompaniment style specified by LN
And converted note data NCT read according to frequency DG
(STLN, CTP, DG). Chord type C in this case
TP represents the type of chord specified by the key depression operation of the left keyboard 11, and the note conversion data NCT (STLN, CTP, DG)
Is a correction value for converting the chord component of the major chord according to the chord type such as minor m, seventh, etc.

As shown in FIG. 5A, the performance data table PLDT includes ten tracks PLDT (S
TLN, TRKN) and the first to sixth tracks (TRN
KN = 0 to 5) are assigned to chords, and the seventh track (TRKN = 6) is assigned to bass tones 8 to 10
The third track (TRKN = 7-9) is assigned to percussion sounds. In each track PLDT (STLN, TRKN), a series of performance data strings including note data NOTE and timbre data TC, that is, accompaniment patterns are stored over time, and in the first track PLDT (STLN, 0). Indicates that non-converted data NCV is inserted and stored at a desired position. In this case, the note data NOTE includes an identification code, an event time EVT, and a key code K as shown in FIG.
It consists of a set of data consisting of C. The identification code indicates that this set of data is note data NOTE, the event time EVT indicates the read timing of the same data NOTE by the time from the beginning of each accompaniment pattern, and the key code KC indicates the pitch of the accompaniment sound. (However, the type of percussion instrument sound is indicated). The key code KC representing the pitch usually indicates the note name of an accompaniment tone based on the C major chord, assuming that a C major chord is played on the left keyboard 11. (A section in which conversion to an accompaniment tone corresponding to the chord type played on the left keyboard 11 is not expected) represents the pitch of the accompaniment tone based on the unique chord type based on the C note.

The tone data TC is, as shown in FIG.
It is composed of a set of data including an identification code, an event time EVT, and a timbre number VOIN. The identification code indicates that this set of data is timbre data TC, the event time EVT indicates the read timing of the data TC by the time from the beginning of each accompaniment pattern, and the timbre number VOIN
Represents the timbre of the accompaniment sound (however, with respect to percussion sounds, the same sound represents a subtle change). The non-conversion data NCV defines the specific section. As shown in FIG. 5D, the identification code, the non-conversion flag data NCVD and the chord type data are used.
It consists of one set of data consisting of TYPD. The identification code indicates that this set of data is non-conversion data NCV, and the non-conversion flag data NCVD indicates that the section is started by “1” and that the specified section is ended by “0”. Represents Further, the chord type data TYPD is added when the non-conversion flag data NCVD is “1”, and indicates a chord type based on each key code KC of the note data NOTE in the specific section. Represent.

In an area for storing other accompaniment data,
A chord detection table for detecting chords is provided.

The operation of the above embodiment will be described with reference to a flowchart. First, a power switch (not shown)
Is input, the CPU 53 starts executing the program in step 100 of FIG. 5, and sets the tone signal forming circuit 40 and the working memory 54 to the initial state in step 102. After this initialization, the CPU 53 proceeds to step 1
A circulation process consisting of steps 04 to 110 is executed, and step 10
4 detects the operation of any key of the left keyboard 11 and the right keyboard 12, and at step 108, the operation panel 2
Operation of any switch on 0 is detected. If any key is operated, the CPU 53 proceeds to step 1
Based on “YES” in 04, that is, determination that there is a key event, the “key event routine” of step 106 is executed. This "key event routine" includes steps 122 to 13 as shown in detail in FIG.
In this routine, the generation of the melody sound and the harmony sound is controlled and the performance chord is detected in accordance with the key operation of the left keyboard 11 and the right keyboard 12. Also,
If any switch or volume on the operation panel 20 is operated, the CPU 53 proceeds to step 108
In step 110, the "switch event routine" is executed based on the determination of "YES" in the step (i.e., the presence of a switch event). This "Switch Event Routine" comprises a step 1 as shown in detail in FIG.
In this routine, the tone of the melody sound and the harmony sound are set according to the operation of the switches and the volumes 21 to 26, and the preparation for the generation of the accompaniment sound is made. When the tempo clock generator 52 generates a tempo clock signal during the execution of the "main program", the CPU 53 interrupts the execution of the "main program" and interrupts and executes the "interrupt program" of FIG. The execution of the "interrupt program" actually controls the generation of the accompaniment sound.

Next, the generation of the melody sound, the harmony sound and the accompaniment sound will be described separately.

A. Generation of Melody Sound First, the player operates one of the tone color selection switch groups 21 to determine the tone color of the melody tone and the harmony tone. In response to this operation, the CPU 53 executes the “switch event routine” (FIG. 8) as described above, and based on the determination processing of step 172 of the routine, executes the operated tone color selection switch 21 in step 174. Is output to the tone signal forming circuit 40. Thus, the tone signal forming circuit 40 determines the tone color of the melody tone and the tone color of the harmony tone. In this state, when the player presses any key on the right keyboard 12, the CPU
53 determines “YES” in both steps 122 and 124 of the “key event routine” (FIG. 6), and sets the value representing the key operated in step 126 to the key code KC.
The key-on process is executed in step 128. In this case, the key code KC changes the sound C to "1".
2 ", and other note names are indicated by values which increase by" 1 "at every semitone interval. In the key-on process, a key-on signal KON representing a key press and the key code KC are output to the musical tone signal forming circuit 40, and the forming circuit 40 has the pitch indicated by the key code KC and has been set. A melody sound signal of the timbre is formed, and the melody sound signal is output to the speaker 42 via the amplifier 41.

When the performer releases any key on the right keyboard 12, the CPU 53 proceeds to steps 122 and 1 described above.
At 24, “YES” and “NO” are determined, respectively, and a key-off process is executed at step 134. In this key-off process, a key code representing the name of the released key
The KC and the key-off signal KOF are output to the tone signal forming circuit 40, which stops the formation of the melody tone signal of the pitch represented by the key code KC. In this manner, when the right and left keys 11, 12 are pressed and released, a melody sound is generated from the speaker 42 in accordance with the operation.

B. Generation of Accompaniment Sound First, the player operates the accompaniment style switch group 22 and the tempo volume 23 in preparation for the generation of the accompaniment sound. When any of the accompaniment style switch groups 22 is operated, the CPU 53 executes the “switch event routine” (FIG. 8) as described above, and operates in step 176 based on the determination processing in step 172 of the routine. The value representing the accompaniment style switch 22
It sets as STLN and executes the processing of steps 178 and 180. The processing of these steps 178 and 180 is necessary during the operation of the automatic accompaniment, and is not required before the start of the accompaniment. When the tempo volume 23 is operated, the CPU 53 executes a tempo setting process in step 182 based on the determination process in step 172. In this tempo setting process, tempo control data corresponding to the operation position of the tempo volume 23 is output to the tempo clock generator 52,
The generator 52 outputs a tempo clock signal to the CPU 53 at a cycle corresponding to the tempo control data. The cycle of the tempo clock signal corresponds to the timing at which a quarter note is divided into 24.

In this state, when the player operates the left keyboard 11 and operates the start switch 25, an accompaniment sound based on the performance of the keyboard 11 is automatically generated. When any key of the left keyboard 11 is depressed or released, the CPU 53 proceeds to step 1 as described above.
22 is determined to be “NO”, and a chord detection process is executed at step 136. In this process, the chord is detected by referring to the chord detection table in the accompaniment data memory 60 in accordance with the combination of keys pressed on the left keyboard 11, and the root and type of the detected chord are detected. Is stored as a chord root CRT and a chord type CTP.

When the start switch 25 is operated,
The CPU 53 sets the run flag RUN to “1” in step 186 based on the determination processing in step 172 (FIG. 8).
And at step 188 the current timing CT
The IM and the non-conversion flag NCVF are set to the initial value “0”. The current timing CTIM is one accompaniment pattern for each accompaniment style (a performance data string composed of ten tracks).
Is represented by the timing at which a quarter note is divided into 24. The non-conversion flag NCVF indicates that the conversion of the note data NOTE in the performance data based on the performance chord type CTP is prohibited by "1", and that the conversion is permitted by "0". After the processing in step 188, in step 190, ten pointers for specifying the addresses of the tracks PLDT (STLN, 0) to PLDT (STLN, 9) specified by the style number STLN are set at the beginning of each track. The address is set.

In such a state, when the tempo clock signal generator 52 outputs a tempo clock signal to the CPU 53 at every timing at which a quarter note is divided into 24, the CPU 5 outputs the tempo clock signal.
3 is the “main program” at each timing (Fig. 5)
Is interrupted, the "interrupt program" is started to be executed in step 220 in FIG. 10, and "YES" is determined in step 222 based on the run flag RUN set to "1". The processing of 224 to 240 is executed. In step 224, it is determined whether or not the current timing CTIM has reached one pattern time. If the current timing CTIM has not reached one pattern time, "NO" is determined in step 224, and the program proceeds to step 224. Proceed to 230 or later.

In the processing after step 230, C
The PU 53 repeatedly executes the “reproduction routine” in step 232 while increasing the variable i by “1” from “0” to “9” by the processing of steps 230, 234, and 236. As shown in detail in FIG. 11, this "reproduction routine" is started to be executed at step 250, and at step 252, each track PLDT (STLN) specified by the style number STLN and the variable i indicating each track.
A set of performance data pointed to by the pointer is sequentially read from N, i), and the processing of step 254 and subsequent steps is executed.

In this case, if the set of performance data is the non-converted data NCV stored only in the first track PLDT (STLN, 0), "YES" is determined in step 254, and step 276 is performed. The non-conversion flag data NCVD in the non-conversion data NCV is set as the non-conversion flag NCVF, and the processing of steps 278 and 280 allows the non-conversion data NCV only when this non-conversion flag NCVF is “1”. The chord type data TYPD in the middle is set as the chord type RCTP read out from the performance data. Then, in step 274, the pointer of the track PLDT (STLN, 0) is advanced, and the program is executed again in step 25.
2 and the next performance data on the same track is read.

The set of performance data is timbre data.
If it is TC and its event time EVT is equal to the current timing CTIM, it is determined as “NO”, “YES”, and “NO” in steps 254 to 258, respectively.
At step 272, a tone color number VOIN representing the tone color of the accompaniment tone is output to the tone signal forming circuit 40. As a result, the tone signal forming circuit 40 sets the tone color of the formed accompaniment tone signal to that represented by the tone color number VOIN.

If the set of performance data is note data NOTE and the event time EVT is equal to the current timing CTIM, steps 254 to 258 are performed.
Are determined to be "NO", "YES", and "YES", respectively, and the processing of steps 260 to 270 is executed to control the generation of musical tones. If the variable i is "0" to "6" and indicates a track relating to a chord component sound or a bass sound, "NO" is determined in step 260, and in step 262, the note data NOTE Key code
The remainder obtained by dividing KC by “12” is set as the frequency DG.
As a result, the frequency DG indicates the number of semitone intervals between the key code KC and the C sound (reference sound of performance data). Next, at step 264, the set non-conversion flag NC
VF is “0” and the type CTP of the performance chord is “0”
Is determined. In this case, no conversion flag NC
If VF is “0” representing conversion by a performance chord and the performance chord is not “0” representing a measure, the above-mentioned step 2 is executed.
At 64, "YES" is determined, and the note conversion table NCT (FIG. 3) is referred to at step 266.
From the same table, style number STLN, performance chord type CT
Note conversion data NCT (STLN, CTP, D
G) is read out and added to the key code KC. Thus, the read key code KC is changed according to the type CTP of the chord played on the left keyboard 11.
If the non-conversion flag NCVF is "1" indicating non-conversion by a performance chord, or if the performance chord is "0" indicating a measure, the process of step 266 is not executed and the program proceeds to step 268. Can proceed. Step 26
At 8, the root CRT of the played chord is added to the converted key code KC or the unconverted key code KC. On the other hand, if the variable i is “7” to “9” and indicates the tracks PLDT (STLN, 7) to PLDT (STLN, 9) relating to the percussion instrument sound, based on the determination of “NO” in step 260, , The program proceeds directly to step 270.

In step 270, the converted key code KC (the key code KC which is not converted if the variable i is 7 to 9), the key-on signal KON and the variable i
Is output to the tone signal forming circuit 40. The tone signal forming circuit 40 forms the accompaniment sound signal of the track specified by the variable i based on the key code KC, the key-on signal KON and the variable i, and outputs the accompaniment signal via the amplifier 41 to the speaker 4.
Output to 2. In this case, the pitch of the accompaniment sound signal is specified by the key code KC (variable i is 7 to 9).
In this case, the type of the percussion instrument sound is specified by the key code KC), and the timbre of the accompaniment sound signal is set by the timbre number VOIN. As a result, the accompaniment sound composed of the chord sound, the bass sound, and the percussion sound is emitted from the speaker 42.

After the processing of steps 270 and 272, the pointer of the track is advanced in step 274, and the program returns to step 252 again to read the next performance data of the same track. On the other hand, the set of performance data is note data NOTE or timbre data TC, and their event time EV
If T is not equal to the current timing CTIM, “NO” is determined in both steps 254 and 256, and the “reproduction routine” ends in step 282. As a result, the performance data sequence in each of the tracks PLDT (STLN, 0) to PLDT (STLN, 9) is read out by the instruction of the pointer, and the generation of the accompaniment sound and the timbre of the accompaniment sound are controlled. Conversion flag NCVF and read chord type RCTP are not converted data
Set according to NCV.

Returning again to the "interrupt program" of FIG. 10, after the processing of steps 230 to 236,
At step 238, “1” is added to the calreton timing CTIM, and at step 240, the program ends. Thereby, every time the tempo clock signal is generated by the tempo clock signal generator 52, that is, a quarter note is generated by two.
At each of the four divided timings, the current timing CTIM sequentially increases by “1”. When the current timing CTIM becomes equal to the end time of one accompaniment pattern, "YES" is determined in step 224 of the "interrupt program", and in steps 226 and 228, the above-described steps 188 and 190 are performed. By the same processing as (FIG. 8), the current timing CTIM and the non-conversion flag
NCVF is set to the initial value “0”, and ten pointers are reset to the start addresses of the tracks PLDT (STLN, 0) to PLDT (STLN, 9). Then, from the start address, the performance data is read again for each of the tracks PLDT (STLN, 0) to PLDT (STLN, 9).

As described above, the start switch 2
By the operation of 5, the automatic accompaniment starts to operate, and the “interrupt program” is executed each time the tempo clock signal generator 52 generates the tempo clock signal (at the timing of dividing quarter notes into 24).
Each track PLDT (STLN, 0) in the accompaniment data memory 60 specified by the style number STLN and the pattern number PTRN
The performance data of the PLDT (STLN, 9) is repeatedly read, and the sounding of the accompaniment sound is controlled. In this case, the key code KC representing the accompaniment sound is converted by the performance chord type CTP based on the non-conversion data NCV included in the performance data stored in the first track PLDT (STLN, 0). , Not converted. That is, from the time when the non-conversion flag data NCVD set to “1” is read, “
Until the non-conversion flag data NCVD set to "0" is read, the key code KC representing the accompaniment tone is not converted by the performance chord type CTP, otherwise the key code KC is converted by the same type CTP. As a result,
In the performance data for each track PLDT (STLN, TRKN), a data group for generating a series of accompaniment sounds close to the melody line is stored over a specific section, and the first track PLDT (STLN, TRKN) is stored. If the non-conversion data NCV including the non-conversion flag data NCVD representing "1" and "0" is stored so as to sandwich the specific section in the performance data string of (STLN, 0), the accompaniment sound data group is used. The flow of a series of accompaniment sounds can be faithfully reproduced, and the automatic accompaniment device can have new functions.

When the player operates the stop switch 26 during the operation of the automatic accompaniment as described above, the CPU 5
3 sets the run flag RUN to “0” in step 192 based on the determination processing in step 152 in FIG.
In step 194, the tone signal forming circuit 40 executes a silencing process. Thereby, the operation of the automatic accompaniment is stopped, and the tone signal forming circuit 40 stops generating the tone signal.

On the other hand, when the player operates any of the accompaniment style switch groups 22 during the operation of the automatic accompaniment as described above, the CPU 53 causes the CPU 1 to execute step 1 in FIG.
The processing of 76 to 180 is executed. In step 176, the style number STLN is set to a value representing the operated switch, and in step 178, each track PLDT (STLN, 0) to PLDT (STLN, 9) specified by the style number STLN
Ten pointers for each are set by the current timing CTIM. Thereby, the accompaniment style switch group 22
Is operated during the automatic accompaniment operation, the tracks PLDT (STLN, 0) to PLDT (STLN, 9) of the newly specified accompaniment style are moved from the position corresponding to the previous position of the automatic accompaniment.
Is read out. After the processing in step 178, a "non-conversion data search routine" is executed in step 180.

This "non-conversion data search routine"
As shown in FIG.
In step 202, the performance data in the first track PLDT (STLN, 0) designated by the style number STLN is sequentially read in the direction opposite to the traveling direction by changing the pointer in the reverse direction, and The non-conversion data NCV is searched, and the search is terminated when the data NCV is first found. If the unconverted data NCV does not exist in the performance data, the same track PLDT (STLN,
The search is terminated at the start address of (0). As a result of the search, if the unconverted data NCV is found, step 204
Is determined to be “YES”, and the above-described steps 276 to 276 are performed.
In steps 206 to 212 similar to step 280 (FIG. 11), the non-conversion flag data NCVD in the found non-conversion data NCV is set as the conversion flag NCVF, and if the setting flag NCVF is “1”. , Unconverted data
Chord type data TYPD in NCV is read out and chord type RC
Set as TP. On the other hand, if the non-conversion data NCV is not found as a result of the search, “NO” is determined in step 204, and the conversion flag NC
VF is set to “0”. As a result, even in the newly switched accompaniment style, the conversion flag NCVF and the read chord type RCTP are treated in the same manner as those in which the performance data of the accompaniment style has been read out before.

C. Generation of the harmony sound The sounding or non-sounding of the harmony sound is determined by operating the harmony selection switch 24. When the player operates the harmony selection switch 24, the CPU 53 inverts the harmony flag HM in step 184 based on the determination processing in step 172 in FIG. If it is "0", change it to "1"). When the flag HM is "0", the flow goes to step 1 in FIG.
At 30, “NO” is determined, and the “harmony routine” of step 132 is not executed, so that no additional sound is generated. On the other hand, if the harmony flag HM is “1”, when the right keyboard 12 is depressed, “YE
S ", the" harmony routine "is executed in step 132, and an additional sound is generated.

This "harmony routine" comprises steps 140 to 162 as shown in FIG.
At 42, based on the key code KC representing the operation key of the right keyboard 12 set by the processing of the step 126 (FIG. 6), the key becomes the highest key among the keys being pressed on the right keyboard 12. It is determined whether they correspond. In this case, if the key is not the highest key, "NO" is determined in step 142, and the execution of the "harmony routine" is terminated in step 162. Not pronounced.

On the other hand, if the key depressed is the highest key, it is determined in step 144 whether or not the run flag RUN is "1" based on the determination of "YES" in step 142. You. In this case, if the automatic accompaniment is stopped and the run flag RUN is “0”, it is determined “NO” in step 144, and the key code KC representing the operated key is changed to “NO” in step 154. The remainder after division by “12” is set as the frequency DG, and in step 156, the chord type HCTP for harmony is set to “0”. As a result, the frequency DG represents the number of semitone intervals between the key codes KC and C, and the chord type HCTP corresponds to the measure M.
Is represented. Set the frequency DG based on the sound C,
The reason why the chord type HCTP is set to the major M is that no chord is played on the left keyboard 11 during the stop of the automatic accompaniment. If the automatic accompaniment is operating, step 1
It is determined to be “YES” at 44, and at step 146,
The remainder obtained by subtracting the result (KC-CRT) of the root chord CRT of the played chord from the key code KC by "12" is set as the frequency DG. Thus, the frequency DG indicates the number of semitone intervals between the key code KC and the root CRT of the played chord.
Next, in steps 148 to 152, the non-conversion flag NCVF
Is "0", the harmonic chord type HCTP is set to the performance chord type CTP, and the non-conversion flag NCVF is set to "0".
If "1", the harmony chord type HCTP is set to the read chord type RCTP described above. Style table STLN, chord type HCTP
Harmonic data HMT (STLN, HCTP, DG, 0) and HMT (STLN, HCTP, DG, 0) for the first and second additional sounds according to the frequency and the frequency DG
Are read out, and the respective harmonic data HMT (STLN, HCTP, DG, 0) and HMT (STLN, HCTP, DG,
0), the first and second additional sound data AD
(0) and AD (1) are calculated, and the data AD (0) and AD (1) and the key-on signal KON are output to the tone signal forming circuit 40 in step 160. As a result, the tone signal forming circuit 40 forms and outputs an additional sound signal having a pitch represented by the first and second additional sound data AD (0) and AD (1).

In this manner, the first harmonic harmony sound is obtained.
And the second additional sound is produced, resulting in the non-conversion flag NCVF
Is “1”, that is, each track PLDT (STLN, TRL
KN), the key code KC in the performance data string is not converted by the performance chord type CTP, the first and second additional tone data AD (0) and AD (1) are converted to the chord type data TYPD in the non-conversion data NCV. , And otherwise, the first and second
Since the additional sound data AD (0) and AD (1) are formed by using the performance chord type CTP or the chord type “0” indicating the major M, the additional sound for the melody sound is obtained by the melody sound and the accompaniment. It can be suitable for sound.

In the above embodiment, predetermined performance data is stored in the accompaniment data memory 60. However, the memory 60 is constituted by a RAM so that a player can write arbitrary data. You can do it,
Arbitrary data may be written from an external recording medium such as a magnetic tape or a magnetic disk.

[Brief description of the drawings]

FIG. 1 is an overall block diagram of an electronic musical instrument provided with an automatic accompaniment device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a data format of a harmonic table in the accompaniment data memory of FIG. 1;

FIG. 3 is a diagram showing an example of a data format of a note conversion table in the accompaniment data memory of FIG. 1;

FIG. 4 is a format diagram of performance data stored in the accompaniment data memory of FIG. 1;

FIG. 5 is a flowchart of a “main program” executed by the microcomputer unit of FIG. 1;

FIG. 6 is a detailed flowchart of a “key event routine” of FIG. 5;

FIG. 7 is a detailed flowchart of a “harmony routine” of FIG. 6;

FIG. 8 is a detailed flowchart of a “switch event routine” in FIG. 5;

FIG. 9 is a detailed flowchart of a “non-conversion data search routine” in FIG. 8;

FIG. 10 is a flowchart of an “interrupt program” executed by the microcomputer unit of FIG. 1;

FIG. 11 is a detailed flowchart of a “reproduction routine” in FIG. 10;

[Explanation of symbols]

11 left keyboard, 12 right keyboard, 13 key press detection circuit, 1
4: Key touch detection circuit, 20: Operation panel, 22: Accompaniment style switch group, 24: Harmony selection switch, 2
5 Start switch, 26 Stop switch, 40
... tone signal forming circuit, 50 ... microcomputer unit,
60 ... accompaniment data memory.

Claims (5)

(57) [Claims] A predetermined chord type and a predetermined chord root;
Multiple accompaniment sound data representing the accompaniment sound name
An accompaniment sound memory storing a plurality of sets according to the
One of the accompaniment sound data strings is sequentially read out over time
Reading means and a chord indicating chord type and root note
Sound instruction means; and
Conversion that converts according to the specified chord type and root note
Means and an accompaniment sound according to each of the converted accompaniment sound data.
Electronic musical instrument having an accompaniment sound signal generating means for generating a signal
The accompaniment sound according to the designated chord type.
Before the conversion prohibited data that indicates that data conversion is prohibited
The conversion prohibition data is read by the reading means while being included in a part of the recording data string.
The conversion means controls the specified chord tie
The conversion of the read-out accompaniment sound data by the
Conversion prohibited that only allows conversion by the specified chord root
Automatic accompaniment equipment for electronic musical instruments characterized by providing stopping means
Place. 2. An accompaniment sound memory in which a plurality of sets of a plurality of pieces of accompaniment sound data representing an accompaniment sound name are stored over time based on a predetermined chord type and a predetermined chord root, and the plurality of sets of accompaniment sound data strings. Reading means for sequentially reading one of them as time elapses, and a sum indicating a chord type and a root note
Sound instruction means; and
An automatic accompaniment device for an electronic musical instrument, comprising: conversion means for converting according to the specified chord type and root note; and accompaniment sound signal generation means for generating an accompaniment sound signal in accordance with each of the converted accompaniment sound data. , The read accompaniment sound according to the indicated chord type
In addition to including, in the accompaniment sound data sequence, conversion prohibition data indicating that data conversion is prohibited over a specific section, the conversion prohibition data is read when the conversion prohibition data is read by the reading unit. the indicated chord type controls said conversion means over a specific section represented by
Conversion of the read accompaniment sound data by
An automatic accompaniment device for an electronic musical instrument, further comprising a conversion prohibiting means for permitting only conversion by a designated chord root. 3. A chord indication according to claim 1 or 2.
Means for playing chords with a plurality of performance operators
Playing means, and the type and root of the chord played by said chord playing means.
Automatic musical instrument composed of a chord detecting means for detecting a sound
Accompaniment device. Wherein the converting means described in the claim 1 or 2, the chord type the accompaniment sound data is the instruction which represents the accompaniment sounds in a specific interval relationship to said designated chord root Means for shifting the accompaniment sound data by an amount corresponding to the interval between the designated chord root and the reference chord root of the accompaniment sound data. Electronic musical instrument automatic accompaniment device. 5. The automatic accompaniment apparatus for an electronic musical instrument according to claim 1 or 2, the chord type data representing a chord type are, as the conversion prohibiting the accompaniment sound data reference with the data in the accompaniment sound data sequence In addition to this, additional sound data representing an additional sound to the melody sound is formed according to the pitch of the melody sound played by the melody playing means, the specified chord root, and the specified chord type. The additional sound data generating means for outputting the additional sound data to the accompaniment sound signal generating means and controlling the generation of the additional sound signal; and the conversion prohibiting means prohibiting the conversion by the designated chord type. Control the additional sound data generating means to generate a chord represented by chord type data in the accompaniment sound data string in place of the designated chord type. An automatic accompaniment device for an electronic musical instrument, further comprising: a chord type replacement means for forming the additional sound data according to a sound type.