JP2601039B2 - Electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a keyboard (melody key).
Chord signal generated along with the performance input from
The present invention relates to an electronic musical instrument that controls the volume level of an automatic performance signal such as a bass sound signal and a percussion instrument sound signal in accordance with the presence or absence of a key performance input .

[0002]

2. Description of the Related Art Conventionally, a plurality of accompaniment sound data representing accompaniment sounds has been stored in a memory in advance, and the accompaniment sound data has been read out from the memory in accordance with the passage of time.
An electronic musical instrument which incorporates an automatic accompaniment device for generating an accompaniment sound signal corresponding to the data and is configured to generate the accompaniment sound signal simultaneously with the melody sound signal of the performance is well known.

[0003]

However, in the electronic musical instrument as described above, the volume of the accompaniment sound signal is constant irrespective of the presence or absence of a melody sound signal, so that there is no melody sound signal. If the volume level of the accompaniment sound signal is set appropriately, the melody sound signal is canceled by the accompaniment sound signal, and the melody becomes unclear. In addition, if the volume level of the accompaniment sound signal is appropriately set in accordance with the state in which the melody sound signal is present, the total volume level generated from the electronic musical instrument becomes too low when the melody sound signal does not exist, for example, during interlude. There's a problem. SUMMARY OF THE INVENTION The present invention has been made to address the above-described problem, and has as its object to detect the presence or absence of a melody sound performance and control the volume level of the accompaniment sound signal based on the detection result, thereby providing an accompaniment sound signal. It is an object of the present invention to provide an electronic musical instrument whose volume level is appropriately set.

[0004]

In order to achieve the above object, the present invention according to claim 1 is characterized by a melody playing means for playing a melody sound, and a plurality of accompaniment sound data representing an accompaniment sound. , A reading means for sequentially reading out the accompaniment sound data stored in the accompaniment sound memory over time, and a melody sound signal corresponding to the melody sound played by the melody playing means. Melody performance detection means for detecting whether or not a melody sound is played by the melody performance means, in an electronic musical instrument having music tone signal generation means for generating an accompaniment sound signal corresponding to the accompaniment sound data read by the read means. The melody performance is controlled by controlling the tone signal generating means according to the detection result of the melody performance detecting means. When there is no play of the melody tone with decreasing the volume level of the feeder said accompaniment tone signal in the provision of the accompaniment sound volume control means for releasing the reduction control of the volume level.

[0005] The configuration of the invention according to claim 2 is characterized in that, in addition to the configuration of the invention according to claim 1, the melody performance detection means detects that there is no melody sound. There is provided a release delay means for delaying the release of the volume level reduction control by the accompaniment volume control means for a time.

According to a third aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the accompaniment sound data is stored in an accompaniment sound memory. With delimiter data indicating
Release delay means for delaying release of the volume level reduction control by the accompaniment volume control means until the reading data is read out by the reading means after the melody performance detection means detects that no melody sound is played is provided. is there.

Further, a structural feature of the invention according to claim 4 is that the delimiter data according to the invention according to claim 3 is also used as data for controlling musical tone elements of an accompaniment sound signal. The configuration of the invention according to claim 5 is characterized in that performance information input means for inputting performance information and a plurality of
And automatic performance memory storing in accordance with their respective time performance data string in the track, double of the automatic playing memory
Reading means for sequentially reading performance data strings from a number of tracks in accordance with the passage of time, and a plurality of performance sound signals corresponding to the performance information input by the performance information input means, and a plurality of read sound signals read by the reading means . the electronic musical instrument having a musical tone signal generating means for generating an automatic performance sound signals of a plurality of rows corresponding to the performance data string, and performance information input detection means for detecting the presence or absence of an input of performance information by the performance information input means , Enter the performance information
The tone signal generating means according to the detection result by the force detecting means.
Controlling the steps to input performance information by the performance information input means.
When there is power, the volume level of the automatic performance sound signal of the plurality of columns is reduced by a different amount for each column, and when there is no input of performance information by the performance information input means,
Automatic performance volume control means for canceling the control for decreasing the volume level of the automatic performance sound signal . Further, the configuration of the invention according to claim 6 is characterized in that, in addition to the configuration of the invention according to claim 5, the performance information input means detects that there is no performance information input, and the automatic performance is performed for a predetermined time. There is provided a release delay means for delaying the release of the volume level reduction control by the volume control means. Further, the structural feature of the invention according to claim 7 is the same as that of claim 5.
In addition to the configuration of the invention according to the above, the automatic performance data stored in the automatic performance memory further includes delimiter data indicating a delimiter of the automatic performance sound string, and that no performance information is input by the performance information input means. There is provided a release delay means for delaying the release of the volume level reduction control by the automatic performance volume control means until the delimiter data is read out by the reading means after the detection of the data. Furthermore, a structural feature of the invention according to claim 8 resides in that the delimiter data according to the invention according to claim 7 is also used as data for controlling a tone element of an automatic performance signal.

[0008]

According to the first aspect of the present invention, there is provided:
In the invention according to the present invention, when a melody sound is played by the melody performance means, the melody performance detection means detects the performance of the melody sound, and the accompaniment volume control means sets the volume level of the accompaniment sound signal in the tone signal generation means. Is reduced, the volume level of the accompaniment sound signal generated together with the melody sound signal is reduced. Further, when the melody performance means does not play the melody sound, the melody performance detection means detects that there is no performance of the melody sound, and the accompaniment volume control means cancels the control of decreasing the volume level. The sound volume level of the accompaniment sound signal generated in the above becomes larger than in the above case. As a result, the claim 1
According to the present invention, even when the accompaniment sound signal is generated together with the melody sound signal, the melody becomes clear without the accompaniment sound signal canceling the melody sound signal. Also,
Even when only the accompaniment sound signal is generated without the melody sound signal, the total volume level generated from the electronic musical instrument is appropriately maintained.

According to the second aspect of the present invention, in addition to the operation of the first aspect of the present invention, the release delay means controls the reduction of the volume level of the accompaniment volume control means. Since the release is delayed by a predetermined time after the melody performance detection means detects that the melody sound is not played, the volume level of the accompaniment sound signal does not increase immediately after the melody sound is no longer played.
The volume level of the accompaniment sound signal increases after a lapse of a predetermined time since the performance disappeared. As a result, according to the second aspect of the invention, in addition to the effect of the first aspect, even if there is a melody sound signal after the melody sound is finished, the melody sound signal is accompanied by an accompaniment sound signal. The end of the melody is clear because it is not canceled by. Also,
Even if the performance of the melody sound is interrupted in a staggered manner, the volume level of the accompaniment sound signal is kept low for a predetermined time, so that the volume of the accompaniment sound signal is stably maintained.

According to the third aspect of the present invention, the accompaniment sound data includes delimiter data indicating a delimiter of an accompaniment sound sequence, and the release delay means controls the accompaniment sound volume. The release of the volume level reduction control of the means is delayed from the detection of the absence of the melody sound by the performance detection means until the separation data is read by the reading means. Change. As a result, according to the third aspect of the invention, in addition to the effects of the first aspect of the invention, the melody ends even if the melody sound signal has a lingering sound as in the second aspect of the invention. At the same time, the volume of the accompaniment sound signal is stably maintained even if the performance of the melody sound is staccato-like. Also, since the volume level of the accompaniment sound signal changes only at each break of the accompaniment sound sequence, for example, for each phrase, the listener does not feel uncomfortable with the accompaniment sound signal.

[0011] In the invention according to claim 4 configured as described above, the delimiter data is also used as data for controlling musical tone elements of the accompaniment sound signal. There is no need to provide the accompaniment sound memory, and in addition to the effect of the invention according to the third aspect, the effect that the capacity of the accompaniment sound memory can be reduced is also exhibited. In the invention according to claim 5 configured as described above, when performance information is input to the performance information input means, the input is detected by the performance information input detection means, and the automatic performance volume control means is controlled by the performance information input detection means. because it reduces the volume level of the automatic performance sound signal of a plurality of rows in the tone signal generation means, an automatic performance sound signal <br/> volume level of generated along with performance sound signals by the performance information input means is reduced. In this case, multiple columns of automatic performance
The volume level of the performance signal is reduced by a different amount for each row.
You. If the performance information is not input in the performance information input means, the performance information input detection means detects that there is no input, and the automatic performance volume control means controls the automatic performance sound signal of a plurality of rows in the tone signal generation means. Since the control for reducing the volume level of the automatic performance sound signal is released , the volume level of the automatic performance sound signals in a plurality of rows becomes higher than in the above case. as a result,
According to the invention according to claim 5, for example, automatic performance sound performance information input means even if the performance sound signals based on the performance information inputted by the performance information input means such as keyboard are both generated with automatic performance sound signal Thus, the performance sound based on the performance information input by the performance information input means is made clear without canceling the performance sound based on the performance information input. In addition, the volume level of the automatic performance sound signal in multiple rows is reduced.
Since the degree is controlled differently for each row,
Multiple rows of automatic performance messages depending on the degree of influence on the body
Each volume level can be determined independently,
Input by the performance information input means without destroying the atmosphere of the body
The performance sound based on the performance information
You. Further, even when only the automatic performance sound is generated without the performance information input by the performance information input means, the total volume level generated from the electronic musical instrument can be appropriately maintained. In the invention according to claim 6 configured as described above, in addition to the effect of the invention according to claim 5, the release delay means cancels the volume level reduction control of the automatic performance volume control means by inputting the performance information input. Since a predetermined time is delayed from the detection of the absence of performance information input by the detection means, the volume level of the automatic performance sound signal does not increase immediately after the performance information input by the performance information input means stops. After a lapse of time, the volume level of the automatic performance sound signal increases. As a result, according to the invention of claim 6, in addition to the effect of the invention of claim 5, in addition to the effect of the performance information input means, the input of the performance information based on the last input performance information after the end of the input of the performance information is performed. Even if there is a lingering sound, the lingering sound is not canceled out by the automatic performance sound, so that the end of the input of the performance information by the performance information input means becomes clear. Further, even if the input of the performance information by the performance information input means is interrupted in a staggered manner, the volume level of the automatic performance sound is kept low for a predetermined time, so that the volume of the automatic performance sound is maintained stably. Further, in the invention according to claim 7 configured as described above, the automatic performance data includes delimiter data indicating a punctuation of the automatic performance sound sequence, and the automatic performance volume control is performed by the release delay means. The release of the volume level reduction control of the means is delayed from the detection of the absence of the performance information input by the performance information input detection means until the separation data is read out by the reading means. Changes. As a result, according to the invention according to claim 7, according to claim 5,
In addition to the effect of the invention according to the sixth aspect, even if there is a lingering performance sound based on the end of the input of the performance information by the performance information input means as in the invention according to the sixth aspect, the input of the performance information by the performance information input means is At the same time that the performance sound is clear, the volume of the automatic performance sound is stably maintained even if the input of the performance information by the performance information input means is staggered.
Further, since the automatic performance sound volume of the automatic performance sound does not change only for each break of the automatic performance sound sequence, for example, for each phrase, the listener does not feel uncomfortable with the automatic performance sound. Further, in the invention according to claim 8 configured as described above, since the delimiter data is also used as data for controlling the tone element of the automatic performance sound signal, it is necessary to provide the delimiter data specially. And the effect that the capacity of the automatic performance memory can be reduced in addition to the effect of the invention according to the seventh aspect.

[0012]

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 mute mode selection switch 24,
A start switch 25 and a stop switch 26 are provided.

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 mute mode selection switch 24 selects between a mode in which the volume of the accompaniment sound is reduced during melody performance and a mode in which the volume is not reduced. The start switch 25 instructs the start of the automatic accompaniment, and the stop switch 26 instructs the stop of the accompaniment. These switches 21
Operations 26 to 26 are detected by the switch operation detection circuit 20a.

The key press detection circuit 13 and the switch operation detection circuit 20a are connected to a bus 30. The bus 30 has a tone signal forming circuit 40, a microcomputer 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. And a melody sound signal and accompaniment sound signal of variable pitch, such as a piano and a clarinet, and a percussion instrument sound signal such as a drum and a cymbal (defined as a part of the accompaniment sound signal in the present case) and outputted. I do. The output of the tone signal forming circuit 40 is connected to a speaker 42 via an amplifier 41.

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. 4, 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 is constituted by a ROM, and includes a performance data table PLDT and a style table ST.
In addition to the LTBL, it also has an area for storing other accompaniment data.

As shown in FIG. 2, the style table STLTBL is divided for each accompaniment style specified by the style number STLN, and each divided storage area corresponds to each track specified by the track number TRKN. Mute level data MTLD, mute delay data MTDD, offset volume data OVLD, and mute release condition data MCDD are stored. The style number STLN represents an accompaniment style specified by the accompaniment style switch group 22, and the track number TRKN represents each track composed of ten performance data strings belonging to each accompaniment style. In this case, the first to sixth tracks (TRKN = 0
~ 5) are assigned to chords, and the seventh track
(TRKN = 6) is assigned to the bass sound, and the eighth to tenth tracks (TRKN = 7 to 9) are assigned to the percussion instrument sound. The mute level data MTLD represents the amount of decrease in the volume level of each accompaniment sound signal accompanying the melody performance during the decrease control. In FIG. 2, "FF" means that no accompaniment sound signal is generated. Mute delay data MT
DD indicates the number of beats (the number of quarter notes) from the time the melody performance is restored to the time the melody performance is restored after the melody performance is restored to the release of the volume level reduction control. The offset volume data OVLD indicates a relative volume level of each accompaniment sound signal. Mute release condition data MCDD
Indicates whether to wait for the release of the volume level decrease control until the start of the next phrase after the lapse of the number of beats, and indicates "0" not to wait for the next phrase. , And "1" means to wait until the next phrase.

As shown in FIG. 3A, the performance data table PLDT is divided into a large number of storage areas PLDT (STLN, TRKN) respectively corresponding to ten tracks for each accompaniment style. In the area PLDT (STLN, TRKN), a series of performance data strings each composed of note data NOTE and timbre data TC, that is, accompaniment pattern data, are stored with time. In this case, the timbre data TC is inserted between the phrases of the accompaniment tone sequence, and the data TC also serves as data representing a phrase break. Note data
The NOTE, as shown in FIG. 3B, is composed of a set of data including an identification code, an event time EVT, and a key code KC. The identification code indicates that this set of data is note data NOTE, and the event time EVT
Represents the read timing of the same data NOTE by the time from the beginning of each accompaniment pattern, and the key code KC represents the pitch of each accompaniment sound based on the C major chord (however, the type of percussion instrument sound represents ). Figure 3 shows the timbre data TC.
As shown in (C), the identification code, the event time EVT,
It is composed of a set of data including a tone 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 same data TC by the time from the beginning of each accompaniment pattern, and the timbre number VOIN indicates the accompaniment Represents the timbre of the sound (however, the percussion instrument sound represents a subtle change in the same timbre)

In the area for storing other accompaniment data,
A chord detection table for detecting a chord and a conversion table for converting performance data representing an accompaniment tone according to the type and root tone of the performance chord are 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 “main program” in step 100 of FIG.
2, the tone signal forming circuit 40 and the working memory 54
Is set to the initial state. After this initial setting, the CPU 53 executes a circulation process consisting of steps 104 to 110, detects the operation of any of the left keyboard 11 and the right keyboard 12 in step 104, and detects the operation of the operation panel 20 in step 108. The operation of any of the switches is detected. When any key is operated, the CPU 53
Executes the "key event routine" of step 106 based on the determination of "YES" in step 104, that is, the presence of a key event. This "key event routine" includes steps 120 to 136, as shown in detail in FIG.
In accordance with the key operation of the 1 and right keys 12, the generation of the melody sound is controlled and the performance chord is detected. If any switch or volume on the operation panel 20 has been operated, the CPU 53 returns to the “switch event routine” in step 110 based on “YES” in step 108, that is, the determination that there is a switch event. Execute This "switch event routine"
Step 140, as shown in detail in FIG.
In this routine, the tone color of the melody sound is set and the preparation for the generation of the accompaniment sound is made according to the operation of the switches and the volumes 21 to 26. During the execution of the “main program”,
When the tempo clock generator 52 generates a tempo clock signal, the CPU 53 interrupts the execution of the "main program" and interrupts and executes the "interrupt program" in FIG. The execution of the "interrupt program" actually controls the generation of the accompaniment sound.

Next, the generation of the melody 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 sound. CPU5
3 executes the "switch event routine" (FIG. 6) as described above in response to this operation, and based on the determination processing in step 142 of the routine, the tone color selection switch 21 operated in step 144 in step 144. Is output to the tone signal forming circuit 40. Thus, the tone signal forming circuit 40 determines the tone color of the melody tone.

In this state, if 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. 5). Then, at step 126, a key-on process is executed. In this key-on process, a key-on signal KON representing a key depression and a key code KC representing the depressed key are output to the tone signal formation circuit 40, and the formation circuit 40 outputs the pitch represented by the key code KC. Then, a melody sound signal of the set tone color is formed, and the melody sound signal is output to the speaker 42 via the amplifier 41. When the player releases any key on the right keyboard 12,
The CPU 53 determines “YES” and “NO” in steps 122 and 124, respectively, and executes a key-off process in step 128. In this key-off process, a key code KC representing the name of the released key and a key-off signal KOF are output to the tone signal forming circuit 40, and the forming circuit 40 produces a melody tone having a pitch represented by the key code KC. Stop signal formation. 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. After the process of step 128, it is determined in step 130 whether or not all the keys of the right keyboard 12 have been released. If all the keys are in the released state, the key-off beat KOFB is determined in step 132. Is initialized to “0”. The key-off beat KOFB functions as a counter that measures the time during which all the keys of the right keyboard 12 are in the released state.

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. 6) as described above, and operates in step 146 based on the determination processing in step 142 of the routine. The value representing the performed accompaniment style switch 22 is assigned to the style number.
Set as STLN and execute the process of step 148.
The process of step 148 is necessary during the operation of the automatic accompaniment, and is not necessary before the start of the accompaniment. When the tempo volume 23 is operated, the CPU 53 executes a tempo setting process in step 150 based on the determination process in step 142. 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, and the generator 52 sends a tempo clock signal to the CPU 53 at a cycle corresponding to the tempo control data. Output. 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 in step 134. 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 154 based on the determination processing in step 142 (FIG. 6).
And the current timing CT in step 156.
Set IM and key-off beat KOFB to initial value “0”.
The current timing CTIM indicates the progress position in one accompaniment pattern (a performance data string composed of 10 tracks) for each accompaniment style by timing obtained by dividing quarter notes into 24. After the processing in step 156, in step 158, ten pointers for specifying addresses of the performance data areas PLDT (STLN, 0) to PLDT (STLN, 9) specified by the style number STLN are stored in the performance data string. Is set to the first address of.

In this state, when the tempo clock signal generator 52 outputs a tempo clock signal to the CPU 53 at every timing when a quarter note is divided into 24, the CPU 5
3 is the "main program" at each timing (Fig. 4)
Is interrupted, the "interrupt program" is started to be executed in step 170 of FIG. 7, and "YES" is determined in step 172 based on the run flag RUN set to "1". The processing of 174 to 184 is executed. In steps 174 to 180, the CP
U53 is provided for each track, that is, each performance data storage area PL.
Variable i representing DT (STLN, i) is set to "1" from "0" to "9"
The “reproduction routine” of step 176 is repeatedly executed while increasing the value at a time.

In the "reproduction routine", as shown in detail in FIG. 8, it is determined in step 192 whether or not the performance data of each track indicated by the variable i is completed. If so, at step 194,
As in the process of step 158 (FIG. 6), the pointer of each track is set to a value indicating the start address of the performance data storage area PLDT (STLN, TRKN). Next, in step 196, a set of performance data indicated by the pointer is sequentially read from each performance data storage area PLDT (STLN, i) specified by the style number STLN and the variable i indicating each track. Then, the processing after step 198 is executed.

In this case, if the set of performance data is the note data NOTE and the event time EVT is equal to the current timing CTIM, steps 198 and 2 are executed.
At 00, both are determined to be “YES”, and at step 202, the “note data routine” is executed to control the generation of the accompaniment sound signal. If the set of performance data is timbre data TC and the event time EVT is equal to the current timing CTIM, the process proceeds to steps 198 and 198.
At 00, “YES” and “NO” are determined, respectively, and at step 204, the “tone color data routine” is executed to control the tone color of the accompaniment sound signal. After the processing of steps 202 and 204, the pointer of the track is advanced in step 206, and the program returns to step 192 again to read the next performance data of the same track. On the other hand, if the set of performance data is the note data NOTE or the timbre data TC, and their event time EVT is not equal to the current timing CTIM, "NO" is determined in step 198, and in step 208 The “reproduction routine” ends.
Thereby, each performance data storage area PLDT (STLN, 0) to PLDT
The performance data sequence in (STLN, 9) is sequentially read out according to the instruction of the pointer.

Next, the "note data routine" (FIGS. 9 and 10) and the "timbre data routine" (FIG. 11) will be described in detail. First, the mute mode flag MT
A case where MD is "0", that is, a case where the volume level of the accompaniment sound signal is not controlled to decrease even when the melody is played will be described.

In this "tone color data routine",
The execution is started in step 250 of FIG. 11, and the tone number VOIN and the variable i in the tone data TC are output to the tone signal forming circuit 40 in step 252. This allows
The tone signal forming circuit 40 controls the tone color of the accompaniment tone signal of the track represented by the variable i to the tone color number VOIN. Next, in step 254, it is determined that "NO", that is, the mute mode flag MTMD is not "1", and in step 256, the mute flag MUT (i) for each track is set to "0". Ends the "timbre data routine".

A "note data routine" (FIG. 9,
In step 10), the execution is started in step 210, "NO" in step 212, that is, it is determined that the mute mode flag MTMD is not "1", and in step 214, the mute flag MUT (i) for each track is determined. )But"
After that, the relative volume level VOLV is set in the offset volume data STLTBL (STLN, i) .OVLD stored in the style table STLTBL in step 226, and the mute level ML is set in the table STLTBL.
Mute level data STLTBL (STLN,
i). Set to MTLD. Next, based on the mute flag MUT (i) set to “0”, “NO” is determined in the step 228, and the program proceeds to the steps 234 to 234.
Proceed to 238. In this case, the variable i ranges from “0” to
If it is “6” and indicates a track related to a chord component sound or a bass sound, “YES” is determined in step 234, and in step 236 the root CRT of the chord played on the left keyboard 11 and Type CTP (step 134 in FIG. 5)
Reference), the conversion table in the accompaniment data memory 60 is referred to, and the key code KC in the note data NOTE is converted by the conversion data in the table and set as a new key code KC. 23
8 is executed. Also, when the variable i is “7” to “9”
If it indicates a track related to a percussion instrument sound, the process of step 238 is executed based on the determination of "NO" in step 234. In step 238, the converted key code KC (provided that the variable i
Is 7 to 9, the key code KC which is not converted, the relative volume level VOLV, the key-on signal KON and the variable i are output to the tone signal forming circuit 40. The tone signal forming circuit 40
Based on the key code KC, the relative volume level VOLV, the key-on signal KON and the variable i, an accompaniment sound signal of the track specified by the variable i is formed and output to the speaker 42 via the amplifier 41. In this case, the pitch of the accompaniment sound signal is specified by the key code KC (when the variable i is 7 to 9, the type of the percussion instrument sound is specified by the key code KC). , The volume of the accompaniment sound signal is specified by the relative volume level VOLV,
The tone color of the accompaniment sound signal is set by the tone color 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.

Returning again to the "interrupt program" of FIG. 7, after the processing of steps 174 to 180, the "count routine" is executed in step 182, and
In step 184, the program ends. This "count routine" is started in step 270 of FIG. 12, and "1" is added to the Caleton timing CTIM in step 272.
When CTIM becomes equal to the end time of one accompaniment pattern,
In step 274, “YES” is determined, and in step 276, the same timing CTIM is set to the initial value “0”. 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 from “0” to “1” over one pattern time.

Next, in step 278, the CPU 53 determines whether or not the remainder (CTIM mod 24) obtained by dividing the current timing CTIM by “24” is “0”, that is, the current timing CTIM determines the start position of the beat. Is determined. In this case, if the current timing CTIM does not indicate the start position of the beat, "NO" is determined in step 278, and the "count routine" ends in step 284. Also, the current timing CTIM
Indicates the start position of the beat, "YES" is determined in step 278, and "1" is added to the key-off beat KOFB in step 282. In this case,
By the processing of step 280, the key-off beat KOFB becomes
The number of beats over two phrases does not exceed the preset maximum value _BMAX .

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 performance data area PLDT (STL) in the accompaniment data memory 60 specified by the style number STLN and the track number TRKN.
The performance data of N, 0) to PLDT (STLN, 9) is repeatedly read, and the sounding of the accompaniment sound is controlled.

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 160 based on the determination processing in step 142 in FIG.
In step 162, the sound signal forming circuit 40 executes a sound deadening 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, if the player operates any of the accompaniment style switches 17 during the automatic accompaniment operation as described above, the CPU 53 proceeds to step 1 in FIG.
46 and 148 are executed. In step 146, the style number STLN is set to a value representing the operated switch, and in step 148, ten pointers for each track are set in the performance data area PLDT by the new style number STLN and the current current timing CTIM.
The values are set to values indicating the traveling positions of (STLN, 0) to PLDT (STLN, 9). Thereby, the accompaniment style switch group 17
Is operated during the automatic accompaniment operation, the performance data areas PLDT (STLN, 0) to PLDT (S
The performance data in TLN, 9) is read.

Next, the mute mode flag MTMD is set to "1".
The generation of the accompaniment sound signal in the state set to is described. In this case, the player operates the mute mode selection switch 24. In response to this operation, the CPU 5
3 executes the "switch event routine" (FIG. 6),
Based on the determination processing of step 142, step 152
Mute mode flag MTMD set to “0” at
To “1”.

In this state, the performance data area PLDT (STLN, i)
When the note data NOTE is read out from the CPU and the "note data routine" (FIG. 9) is executed, step 21 is executed.
In step 216, it is determined whether or not all keys on the right keyboard 12 have been released. In this case, if any key of the right keyboard 12 is being pressed, the mute flag for each track is determined in step 218 based on the determination of “NO” in step 216.
MUT (i) is set to "1", and at step 226, the relative volume level VOLV and the mute level
ML is offset volume data STLTBL (STLN, i) in style table STLTBL. OVLD and mute level data
STLTBL (STLN, i). Set to MTLD respectively. And
In this case, since the mute flag MUT (i) is set to “1”, “YES” is determined in the step 228, and the processing in the steps 230 and 232 is executed.

In step 230, it is determined whether or not the set mute level ML is "FF".
Is determined to be “YES”, and steps 234 to 238 are performed.
Is not executed, and the "note data routine" ends in step 240. As a result, no accompaniment sound signal is generated for this track indicated by the variable i. If the mute level ML is not “FF”, “NO” is determined in step 230, and
After the set mute level ML is added to the relative volume level VOLV at 32, the processing of steps 234 to 238 is executed to control the generation of the accompaniment sound signal. In this case, mute level data STLTBL (STLN, i) in style table STLTBL. Since MTLD is set to “0” or negative, the relative volume level VOLV becomes the offset volume data STLTBL (STL
N, i). Set to a value equal to or less than OVLD. As a result, the volume level of the accompaniment sound signal formed by the tone signal forming circuit 40 decreases. As a result, when the right keyboard 12 is played and a melody sound signal is generated, the volume level of the accompaniment sound signal is lowered, and the accompaniment sound signal does not cancel the melody sound signal, and the melody becomes clear. Also, when the timbre data TC is read from the performance data area PLDT (STLN, i) and the "timbre data routine" (FIG. 11) is executed, steps 254 and 254 are executed.
At 258, the determination is "YES" or "NO", respectively. At step 260, the mute flag MUT (i) specified by the variable i is set to "1". Is controlled to decrease.

On the other hand, in this state, if all the keys of the right keyboard 12 are released and the "note data routine" (FIG. 9) is executed, "YES" is determined in step 216 of the routine. At step 220, the style number STLN and the variable i in the style table STLTBL are determined.
Mute release condition data STLTBL (STLN, i) specified by (corresponding to track number TRKN). MCDD is read out and the same data STLTBL (STLN, i). It is determined whether or not MCDD is "0". In this case, mute release condition data STLTBL (STLN, i). If the MCDD is “0” indicating that the mute release is not to be waited until the next phrase delimiter, the style number STLN and the style number STLN in the style table STLTBL are determined in step 222 based on the determination of “YES” in step 220. Mute delay data STLTBL (STLN, i) specified by variable i. MTDD is read, and the key-off beat KOFB is set to the data STLTBL (STLN, i). It is determined whether the value is equal to or more than the MTDD value. The key-off beat KOFB is cleared to "0" when the last key being depressed on the right keyboard 12 is released by the processing of steps 130 and 132 in FIG. Since the value is increased by “1” for each beat by the process of 282,
This represents the elapsed time during which the melody performance has been completed and none of the keys are depressed on the right keyboard 12, and this time represents the mute delay data STLTBL (STLN, i). If the MTDD value is exceeded, the mute flag MUT (i) for each track is set to "0" in step 224 based on the determination of "YES" in step 222. Then, after the process of step 226, "NO" is determined in step 228, and the processes of steps 230 and 232 are not executed. Therefore, the control of decreasing the volume level of the accompaniment sound signal is released. Further, the time represented by the key-off beat KOFB is the mute delay data STLTBL (STLN,
i). If the value is less than the MTDD value, “N
It is determined as "O", and the mu flag MUT (i) is maintained at the previous "1", so that the control of decreasing the volume level of the accompaniment sound signal is not released.

As described above, after the melody performance on the right keyboard 12 is completed, the control for decreasing the volume level of the accompaniment sound signal is not released until a predetermined number of beats has elapsed. After the key is released, even if there is a lingering sound of the melody sound signal, the lingering sound is not canceled by the accompaniment sound signal, and the end of the melody becomes clear. Also,
Even if the performance of the melody sound is interrupted in a staggered manner, the volume level of the accompaniment sound signal is kept low for a predetermined time, so that the volume of the accompaniment sound signal is stably maintained.
Note that the mute release condition data STLTBL (STLN, i). MC
If the DD is “1” indicating that the mute release is to be waited until the next phrase break, based on the determination of “NO” in the step 220, the step 222 for changing the mute flag MUT (i) is performed. Because the flag MUT (i) is maintained at the previous value without executing the process of H.224, the control of decreasing the volume level of the accompaniment sound signal is not released in this "note data routine".

When the "tone color data routine" (FIG. 11) is executed in a state where all the keys of the right keyboard 12 are released, "YE" is also executed in step 258 of the routine.
S ", and in step 262, the mute release condition data STLTBL (STLN, i). MCDD is read and the same data ST
LTBL (STLN, i). It is determined whether MCDD is "1". In this case, the mute release condition data STLTBL (STLN,
i). If the MCDD is "1" indicating that the mute release is to be waited until the next phrase delimiter, the key-off beat KOFB is set to the mute delay in the step 264 based on the determination of "YES" in the step 262 as in the above case. Data STLTBL (STLN, i). It is determined whether the value is equal to or more than the MTDD value. The key-off beat KOFB is the mute delay data STLTBL (STLN, i). If the value is equal to or larger than the MTDD value, the mute flag MUT (i) for each track is set to "" in step 224 based on the determination of "YES" in step 264.
If the key-off beat KOFB is less than the mute delay data STLTBL (STLN, i) .MTDD value, it is determined as “NO” in the step 264, and the mu flag MUT (i) is set to the previous value. Is maintained at "1". On the other hand, this "timbre data routine" is used in the performance data storage area PLDT (S
TLN, i) is executed each time the tone color data TC is read out, that is, at each segment break of the accompaniment tone sequence. Therefore, in this case, only when all the keys of the right keyboard 12 are released and a predetermined number of beats have elapsed and each phrase has been delimited, the volume level of the accompaniment sound signal is reduced. The decrease control is released. As a result, in this case, as described above, the end of the melody is clear even if the melody sound signal has a lingering sound, and the volume of the accompaniment sound signal is stable even if the melody sound is staccato-like. At the same time, the change in the volume level of the accompaniment sound signal does not make the listener uncomfortable. Note that the mute release condition data STLTBL (STLN, i). If the MCDD is "0" indicating that the mute release does not wait for the next phrase delimiter, a step 2 for changing the mute flag MUT (i) based on the determination of "NO" in the step 262.
Since the flag MUT (i) is maintained at the previous value without performing the processing of steps 64 and 266, the control of decreasing the volume level of the accompaniment sound signal is not released in this "tone color data routine".

In the above embodiment, the timbre data
The TC is stored in a portion that becomes a delimiter of each phrase of the accompaniment sound sequence, and the same data TC is used as a condition for canceling the control of decreasing the volume level of the accompaniment sound signal. The data for controlling the tempo of the automatic accompaniment, the modulation of the automatic accompaniment sound, the subtle pitch change, the volume level, the duration, etc. is stored for each phrase segment, and the data is controlled to decrease the volume level. May be used as a condition for canceling. Further, in place of the timbre data TC, dedicated data representing a delimiter of each of the phrases may be used.

Also, in the above embodiment, the switching of the volume level of the accompaniment sound signal is delayed by a predetermined time from when all the keys of the right keyboard 12 are released only when the control of decreasing the volume level of the accompaniment sound signal is released. However, even when the sound volume level is controlled to be large and the sound volume level is switched to a small value in response to the key depression of the right keyboard 12, the switching may be delayed. In this case, it is effective to perform the switching at the next phrase break after a new key press on the right keyboard 12.

In the above embodiment, the mute level data MTLD, mute delay data MTDD, offset volume data OVLD and mute release condition data MCDD are provided for each track. It may be provided in common, or may be provided for each note data NOTE in each track.

In the above embodiment, predetermined performance data is stored in the accompaniment data memory 60. However, this memory 60 is constituted by a RAM, and 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 style table in an accompaniment data memory of FIG. 1;

FIG. 3 is a format diagram of performance data stored in an accompaniment data memory of FIG. 1;

FIG. 4 is a flowchart of a “main program” executed by the microcomputer unit of FIG. 1;

FIG. 5 is a detailed flowchart of a “key event routine” of FIG. 4;

FIG. 6 is a detailed flowchart of a “switch event routine” of FIG. 4;

FIG. 7 is a flowchart of an “interrupt program” executed by the microcomputer unit of FIG. 1;

FIG. 8 is a detailed flowchart of a “reproduction routine” of FIG. 7;

9 is an upper half of a detailed flowchart of a “note data routine” in FIG. 8;

FIG. 10 is a lower half of a detailed flowchart of a “note data routine” in FIG. 8;

FIG. 11 is a detailed flowchart of a “tone color data routine” of FIG. 8;

FIG. 12 is a detailed flowchart of a “count routine” of FIG. 7;

[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 ... Mute mode selection switch, 25 ... Start switch, 26 ... Stop switch, 40 ... Tone signal forming circuit, 50 ... Microcomputer section, 60 ... Accompaniment data memory.

Claims (8)

(57) [Claims] 1. A melody playing means for playing a melody sound, an accompaniment sound memory storing a plurality of accompaniment sound data representing the accompaniment sound over time, and an accompaniment sound data stored in the accompaniment sound memory over time. Reading means for sequentially reading in accordance with melody sound means for generating a melody sound signal corresponding to the melody sound played by the melody playing means and generating an accompaniment sound signal corresponding to the accompaniment sound data read by the reading means. An electronic musical instrument comprising: a melody performance detecting means for detecting whether or not a melody sound is played by the melody playing means; and controlling the musical tone signal generating means in accordance with a detection result by the melody performance detecting means. When a sound is played, the volume level of the accompaniment sound signal is reduced and the melody sound is reduced. Electronic musical instrument characterized by providing a accompaniment volume control means for canceling the reduction control of the volume level when playing no. 2. The electronic musical instrument according to claim 1, wherein the control of decreasing the volume level by the accompaniment volume control unit is canceled for a predetermined time after the melody performance detection unit detects that no melody sound is played. An electronic musical instrument provided with a cancellation delay means for delaying the delay. 3. The electronic musical instrument according to claim 1, wherein the accompaniment sound data stored in the accompaniment sound memory includes delimiter data indicating a delimiter of an accompaniment sound sequence, and the melody performance detection is performed. Releasing delay means for delaying release of the volume level reduction control by the accompaniment volume control means until the reading means reads the delimiter data after the means detects that no melody sound is played. And an electronic musical instrument. 4. The electronic musical instrument according to claim 3, wherein the delimiter data is also used as data for controlling musical tone elements of an accompaniment sound signal. 5. A performance information input means for inputting performance information, an automatic performance memory in which performance data strings are stored in a plurality of tracks over time , respectively, and a performance data string is read from a plurality of tracks in the automatic performance memory , respectively. Reading means for sequentially reading out as time passes, generating a performance sound signal corresponding to the performance information input by the performance information inputting means, and reading a plurality of performance data strings read out by the reading means. the electronic musical instrument and a music signal generating means for generating a self <br/> dynamic performance sound signals of a corresponding recovery sequence, the performance information by the performance information input means
A performance information input detection means for detecting the presence or absence of input of the
The musical tone according to the detection result by the performance information input detecting means.
The signal generation means is controlled to perform the performance by the performance information input means.
When the performance information is input, the volume level of the automatic performance sound signal of the decimation column is reduced by a different amount for each column, and when the performance information is not input by the performance information input means.
An electronic musical instrument provided with automatic performance volume control means for canceling the control of decreasing the volume level of the automatic performance sound signal in the reverse sequence . 6. An electronic musical instrument according to claim 5, wherein
And that there is no performance information input by the performance information input means.
The automatic performance volume control for a predetermined time after the
Release delaying release of volume level reduction control by means
An electronic musical instrument comprising a delay unit. 7. An electronic musical instrument according to claim 5, wherein
The automatic performance data stored in the automatic performance memory.
Data contains delimiter data indicating the delimiter of the automatic performance sound string.
The performance information by the performance information input means.
Said reading means after detecting that no information is input
Until the delimiter data is read out.
Release of the volume level reduction control by the performance volume control means is delayed.
Electronic delay characterized by providing a release delay means for extending
vessel. 8. A musical tone of an automatic performance signal, wherein
The feature is that it is also used as data for controlling elements.
An electronic musical instrument according to claim 7.