JP2722880B2 - Electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument having an automatic accompaniment function.

[0002]

2. Description of the Related Art In a conventional electronic musical instrument having an automatic accompaniment function, when a key depression state is detected after the automatic accompaniment is started, the volume and the like of the automatic accompaniment are controlled. Sand
If a melody is played during the accompaniment sound, the accompaniment
The sound often consists of multiple sounds and the melody sound often consists of single sounds.
No. In such a performance state, the accompaniment sound
The volume is relatively large compared to the volume of the melody sound,
Melody sounds are masked by accompaniment sounds
There was an inconvenience. To solve these inconveniences,
Conventional electronic musical instruments with dynamic accompaniment function
After starting, the automatic accompaniment is detected by detecting the performance operation.
When the volume of the sound is lowered and the performance operation stops,
The volume was being restored.

[0003]

By the way, in the above-mentioned conventional electronic musical instrument, when the key depression state is detected after the automatic accompaniment is started, the volume or the like immediately changes. Before and after is detected, there is a disadvantage that the musical tone changes abruptly, giving an unnatural feeling to the player and the audience. The present invention has been made under such a background, and an object of the present invention is to provide an electronic musical instrument in which a musical tone does not suddenly change even if a key depression state is detected after automatic accompaniment starts. I do.

[0004]

According to a first aspect of the present invention, there is provided a keyboard and an electronic musical instrument having an automatic accompaniment function, a key operation detecting means for detecting a key operation on the keyboard. Time during automatic accompaniment playback
A timekeeping means, a clock unit key operated by the key operation detecting means for measuring an elapsed time from said key operation detecting point start counting whenever those found, volume control means for controlling the volume of automatic accompaniment with the door, in the automatic accompaniment playback, the key operation detecting means by the key operation start is detected, changes control by said volume control means the volume of the automatic accompaniment tone in said automatic accompaniment playing, also, pre-Symbol total by the timing means
When the measured elapsed time reaches a predetermined time, the volume control means performs control so as to start restoring the volume of the automatic accompaniment sound under the change control.
According to a second aspect of the present invention, in the first aspect of the invention, the automatic accompaniment function has an accompaniment function using an automatic accompaniment pattern of a plurality of tracks, and the time setting means sets the predetermined time for each track. And the volume control means controls the return of the volume of the automatic accompaniment sound according to the predetermined time set for each track. According to a third aspect of the present invention, in the first aspect, the automatic accompaniment function has an accompaniment function using an automatic accompaniment pattern of a plurality of tracks, and sets a volume value to be changed for each track. There is further provided setting means, wherein the volume control means performs a change control and a return control of the volume of the automatic accompaniment sound according to the volume value set for each track.

[0005]

According to the first aspect of the present invention, a key operation is detected by the key operation detecting means during automatic accompaniment playback.
Each time the timekeeping in the timekeeping means is started, the key operation detection
Is the elapsed time measurement from the time, the key operation start volume of automatic accompaniment tone is changed controlled when it is detected, the time which the elapsed time reaches a predetermined time, i.e., when the key operation is given
If no automatic accompaniment sound is changed, the volume of the automatic accompaniment sound is restored. According to the second aspect of the present invention, the restoration of the volume of the automatic accompaniment sound using the automatic accompaniment pattern of a plurality of tracks is controlled in accordance with the predetermined time set for each track. According to the third aspect of the present invention, the change control and the return control of the volume of the automatic accompaniment sound using the automatic accompaniment patterns of a plurality of tracks are performed according to the volume value set for each track.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described. In this embodiment, as shown in FIG. 11, when a key in the right key range of the keyboard is pressed during automatic accompaniment (FIG. 11A), automatic accompaniment is immediately muted. After a predetermined time (for example, two beats) has elapsed since the last key in the right key range was pressed, a predetermined rate (for example, 1 /
Automatic accompaniment is restored at (one level every 16 beats). As a result, even after the automatic accompaniment starts, even if the key pressed state is detected, the musical tone does not suddenly change.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an electronic musical instrument according to a first embodiment of the present invention, in which 1 is a microcomputer. In this microcomputer 1, reference numeral 2 denotes a CPU (central processing unit) for controlling each unit of the apparatus, and reference numeral 3 denotes a tempo clock generation circuit for generating a tempo clock, each time a preset time elapses (for example, 1/16 beat). Every,
An interrupt pulse is supplied to CPU1. 4 is CPU
2 in which a control program used in 2 is stored
M is a program memory.

Reference numeral 5 denotes a working memory comprising a RAM in which various registers and flags used when the CPU 2 performs various processes are secured. In the working memory 5, the table shown in FIG. 2 is provided for each style that is a type of automatic accompaniment such as rock and waltz. In FIG. 2, TRK is a track, chords (chords) on tracks 0-5, a bass sound on track 6, and a track 7
Percussion instrument sounds (rhythm sounds) are assigned to .about.9, respectively. Then, for each track, the mute level MT
LD, mute delay MTDD, and offset volume OVLD are respectively set. The mute level MTLD is a level of a sound volume to be lowered by mute according to the pressing of a key in the right key range, and FF _H (FF _H is 16
Indicates a hexadecimal number. Hereinafter, the same applies. ) Means no sound. Mute delay MTDD
Is the number of beats from when the last key in the right key range is pressed until the mute is restored. Offset volume OV
LD is a volume offset value that is a balance of volume.

Reference numeral 6 denotes an accompaniment data memory composed of a ROM, in which accompaniment patterns for two measures are stored for each track, and the accompaniment patterns are key codes, rhythm types and pronunciations that are generated at each timing. It is composed of data FF _{H and the} like indicating not to be performed. Reference numeral 7 denotes a keyboard composed of a plurality of keys, and includes a left key range 7a as a key range for accompaniment and a right key range 7b as a key range for playing a normal melody or the like. Reference numeral 8 denotes a key press detection circuit that detects that a key on the keyboard 7 has been operated and outputs key information corresponding to the key.

In addition, an operation panel 9 includes a master volume 9a for controlling the volume, an automatic accompaniment start switch 9b, an automatic accompaniment stop switch 9c, a style switch 9d, and the like. The function of each switch will be described later. Reference numeral 10 denotes a switch operation detection circuit that detects that each switch of the operation panel 9 has been operated and outputs operation information corresponding to each switch. Reference numeral 11 denotes a tone signal forming circuit which is controlled by the CPU 2 to output a tone signal, 12 denotes an amplifier for amplifying the tone signal output from the tone signal forming circuit 11, and 13 denotes a speaker which converts an output signal of the amplifier 12 into a tone. .

In such a configuration, the operation of the CPU 2 will be described with reference to the flowcharts of FIGS. When power is applied to the electronic musical instrument of FIG.
First, the process proceeds to the process of step SA1 of the main routine in FIG. The initial setting includes setting of an initial tone color in the tone signal forming circuit 11, clearing various registers of the working memory 5, and the like. Then, the CPU 2 proceeds to step SA2.

In step SA2, it is determined whether or not there is a key event, that is, whether or not any key on the keyboard 7 has been pressed or released by the operator, and whether or not the key pressing detection circuit 8 has detected the event. to decide. The result of this determination is “Y
In the case of "ES", the process proceeds to Step SA3.

At step SA3, a key event process which is performed when any key on the keyboard 7 is pressed or released. FIG. 4 shows a routine of this processing. In this routine, in step SB1, it is determined whether or not the flag RUN which is set to 1 when the automatic accompaniment is being performed is set to 1. The result of this determination is “YE
If "S", that is, if the flag RUN is set to 1, the process proceeds to step SB2.

In step SB2, it is determined whether or not the key whose event has been detected exists in the right key range 7b. If the result of this determination is "NO", that is, if the key for which the event has been detected exists in the left key range 7a, the process proceeds to step SB
Proceed to 3. In step SB3, the chord is detected, the root code of the detected chord is stored in the register RT in which the root code of the chord is stored, and the type code of the detected chord is stored in the register TP in which the type code of the chord is stored. After that, the process returns to the main routine of FIG. 3 and proceeds to step SA4.

On the other hand, if the decision result in the step SB2 is "YES", that is, if the key in which the event is detected exists in the right key range 7b, the process proceeds to a step SB4. If the determination result of step SB1 is "NO", that is, the automatic accompaniment is in the stopped state, and the flag RU
Even if N is reset to 0, step SB4
Proceed to.

At step SB4, it is determined whether or not the detected event is an ON event. If the result of this determination is "NO", the flow proceeds to step SB5. In step SB5, after performing a key-off process (mute process) of the corresponding key, the process returns to the main routine of FIG. 3 and proceeds to step SA4.

On the other hand, if the decision result in the step SB4 is "YES", that is, if the detected event is an ON event, the process proceeds to a step SB6. At step SB6, the key-on process (sound-producing process) of the corresponding key is performed, and then the process proceeds to step SB7. In step SB7, after clearing the value of the count register CT for counting the elapsed time (beat count) from pressing any key in the right key range 7b of the keyboard 7 to 0, the process returns to the main routine of FIG. Then, the process proceeds to Step SA4.

In the main routine of FIG. 3, in step SA4, it is determined whether or not there is a switch event, that is, the operator operates any switch on the operation panel 9, and the switch operation detection circuit 10 detects the event. It is determined whether or not. If this determination is "NO", the flow returns to step SA2. Meanwhile, step SA4
Is "YES", that is, if there is a switch event, the process proceeds to Step SA5.

At step SA5, a switch event process which is performed when any switch on the operation panel 9 is operated is performed. FIG. 5 shows a routine of this processing. In this routine, in step SC1, it is determined which of the style switch 9d, the start switch 9b, the stop switch 9c and the master volume 9a of the operation panel 9 has been operated. Then, the process proceeds to one of the following steps SC2, SC5, SC7 and SC8 according to each switch. First, when the style switch 9d in FIG. 1 is operated, the process proceeds to step SC2.

In step SC2, the style number corresponding to the style switch 9d operated by the operator is stored in the style number register STLN, and the flow advances to step SC3. In step SC3, the register VOLV (i) storing the offset value centered on the master volume value of each current track (i = 0 to 9) is stored in FIG.
The value of the offset volume OVLD set in advance is stored in the table shown in FIG. Where STLT
BL means a style table, and STLN means a style number. And CPU2
Proceeds to step SC4. In step SC4, after the value of the count register CT is cleared to 0, the process returns to the main routine of FIG. 3 and returns to step SA2.

If the start switch 9b shown in FIG. 1 has been operated, the operation proceeds to step SC5. Step SC
In step 5, after setting the flag RUN to 1, step S
Proceed to C6. In step SC6, the value of the register CLK in which the value of the tempo clock is stored is cleared to 0, and the value of the count register CT is cleared to 0.
The process returns to the main routine of FIG. 3 and returns to step SA2.

If the stop switch 9c in FIG. 1 has been operated, the operation proceeds to step SC7. Step SC
At 7, the flag RUN is reset to 0, and the process returns to the main routine of FIG. 3 and returns to step SA2.

If the master volume 9a in FIG. 1 has been operated, the operation proceeds to step SC8. The processing in steps SC8 to SC10 described below is performed for the following reason. That is, the value sequentially stored in the register VOLV (i) is an offset value centered on the value of the master volume 9a, but when muting is performed, the volume level needs to be 0. In this case, a value obtained by adding a sign (-) to the value of the master volume 9a is stored as an offset value in the register VOLV (i). However, since the offset value for mute changes each time the operator operates the master volume 9a, the value of the master volume 9a is stored in the processing of steps SC8 to SC10.

At step SC8, the value of the register VLM storing the current value of the master volume 9a is replaced with the value of the register OLD storing the value of the past master volume 9a.
After that, the process proceeds to Step SC9. Step SC9
Then, after the value of the master volume 9a operated by the operator is stored in the register VLM, the process proceeds to step SC10.

In step SC10, a register VOLV (k) in which the current master volume offset value of each track is stored is stored with a value (-) added to the value stored in the register VLM. Where k is
VOLV (k) = − OLD. This processing is performed because, in order to mute at the immediately preceding stage, if the value stored in the register VLM with the sign (-) added to the value stored in the register VOLV (k) is muted, However, it is not completely silenced.
Then, the CPU 2 proceeds to step SC11. In step SC11, after outputting the value of the register VLM to the tone signal forming circuit 11, the process returns to the main routine of FIG. 3 and returns to step SA2.

Next, the interrupt processing of the CPU 2 will be described with reference to the flowcharts of FIGS. This interrupt processing is executed by an interrupt pulse supplied from the tempo clock generation circuit 3 of FIG. 1 every 1/16 beat. At step SD1 in FIG. 6, it is determined whether or not the flag RUN is set to 1.
If the result of this determination is “NO”, nothing is performed and FIG.
Return to the main routine.

On the other hand, if the decision result in the step SD1 is "YES", that is, if the flag RUN is set to 1, the process proceeds to a step SD2. At step SD2, a register TR in which the track number is stored
In the chord track, the process goes to step SD3. In step SD3, a reproduction process for reproducing each track is performed. The details of this reproduction processing will be described later. When the reproduction process ends, the CPU 2 proceeds to step SD4.

At step SD4, the value of the register TR is incremented by 1, and then the process proceeds to step SD5. In step SD5, it is determined whether or not the value of the register TR is 9 or more, that is, whether or not the processing in step SD3 described above has been completed for all tracks. If this determination is "NO", the flow returns to step SD3.

On the other hand, if the decision result in the step SD5 is "YES", that is, if the value of the register TR is 9 or more and the processing in the step SD3 is completed for all the tracks, the process proceeds to a step SD6. . At Step SD6, a count process for incrementing the values of the registers CLK and CT is performed. Details of this counting process will be described later. Then, when this counting process ends, the CPU 2 returns to the main routine of FIG.

Next, the reproduction process of the CPU 2 will be described with reference to FIGS.
This will be described with reference to the flowchart of FIG. When the processing of the CPU 2 proceeds to step SD3 in FIG. 6, the reproduction processing routine shown in FIG. 7 is started. The CPU 2 first proceeds to the process of step SE1, and performs a mute process for calculating a mute volume level. FIG. 8 shows a routine of this processing. In this routine, in step SF1, the value of the count register CT is changed to the style number ST shown in FIG.
Track number T in LN style table STLTBL
It is determined whether or not the value is greater than or equal to the value of the mute delay MTDD of R. That is, it is determined whether or not the time to release the mute has been reached. If the result of this determination is "NO", the flow proceeds to step SF2.

At step SF2, the style number STL
Track number TR of style table STLTBL of N
Is determined as to whether or not the mute level MTLD is FF _H, that is, whether to mute completely or simply lower the level. If this determination is "NO", the flow proceeds to step SF3. In step SF3, after storing the value stored in the register VLM with a sign (-) in the register VOLV (TR), the process returns to the reproduction processing routine of FIG. 7 and proceeds to step SE2.

[0032] On the other hand, if the judgment result of step SF2 is "YES", that is, when the mute level MTLD track number TR style table STLTBL style number STLN is FF _H, the process proceeds to step SF4. In step SF4, the register VOL
After adding the value of the offset volume OVLD and the value of the mute level MTLD of the track number TR of the style table STLTBL of the style number STLN to V (TR), the process returns to the reproduction processing routine of FIG. Proceed to.

If the result of the determination in step SF1 is "YE
S ", that is, when the value of the count register CT is
Style table STLTBL of style number STLN
If it is equal to or greater than the value of the mute delay MTDD of the track number TR, the process proceeds to step SF5. Step S
In F5, after the value of the register VOLV (TR) is incremented by 1, the process proceeds to step SF6.

At step SF6, the register VOLV
It is determined whether the value of (TR) is equal to or greater than the value of the offset volume OVLD of the track number TR in the style table STLTBL of the style number STLN. If the result of this determination is “NO”, the process returns to the reproduction process routine of FIG. 7 without doing anything, and proceeds to step SE2. On the other hand, if the decision result in the step SF6 is "YES", that is, if the value of the register VOLV (TR) is equal to or more than the value of the offset volume OVLD of the track number TR in the style table STLTBL of the style number STLN, Proceed to SF7. At step SF7, the style number STL is stored in the register VOLV (TR).
Track number TR of style table STLTBL of N
After storing the value of the offset volume OVLD, the process returns to the reproduction process routine of FIG. 7 and proceeds to step SE2.

In step SE2 of FIG. 7, each data of the accompaniment pattern is read out from the accompaniment data memory 6 based on the data stored in the style register STLN, the track register TR and the tempo clock register CLK, and the key code is set. After storing in the register KC, the process proceeds to step SE3. At step SE3, it is determined whether or not data FF _H indicating that the key code stored in the register KC does not sound. If the result of this determination is "NO", the process returns to the interrupt processing routine of FIG. 6 without doing anything, and proceeds to step SD4. On the other hand, the determination result of step SE3 is “YES”
In other words, if the key code stored in the register KC is not the data FF _H indicating that no sound is generated, the process proceeds to step SE4.

At step SE4, note data processing is performed. FIG. 9 shows a routine of this processing. In this routine, in step SG1, the register VOLV (T
It is determined whether or not a value obtained by adding a sign (-) to the value stored in the register VLM is stored in R). If the result of this determination is "NO", nothing is done and the processing returns to the interrupt processing routine of FIG. 6 via the reproduction processing routine of FIG. 7, and proceeds to step SD4.

On the other hand, if the decision result in the step SG1 is "YES", that is, the register VOLV (T
If R) does not store the value stored in the register VLM with the sign of (-), the process proceeds to step SG.
Proceed to 2. At step SG2, the value of the register TR is 6
It is determined whether or not the following is true, that is, whether or not the track is a chord or a bass sound. The result of this determination is “Y
In the case of "ES", the process proceeds to Step SG3.

At step SG3, the key code stored in the register KC is converted to the chord root code stored in the register RT and the track number stored in the register TR using a code conversion table or a base conversion table (not shown). Convert the key code to register K
After storing in C, the process proceeds to step SG4. On the other hand, when the determination result of step SG2 is “NO”, that is,
If the value of the register TR is larger than 6 and the track is a percussion instrument sound, the process proceeds to step SG4.

At step SG4, the registers KC, VO
After outputting each data stored in each of the LV (TR), KON and TR, that is, the key code, the offset value of the currently set volume, the key-on signal and the track number to the tone signal forming circuit 11, FIG. After the reproduction process routine, the process returns to the interrupt process routine of FIG. 6 and proceeds to step SD4.

Next, the counting process of the CPU 2 will be described with reference to the flowchart of FIG. When the processing of the CPU 2 proceeds to step SD6 in FIG. 6, a count processing routine shown in FIG. 10 is started. First, the CPU 2
Proceeding to step SH1, the value of the tempo clock register CLK is incremented by 1, and
Proceed to 2.

In step SH2, it is determined whether or not the value of the tempo clock register CLK is equal to one pattern time. If the result of this determination is "YES", the flow proceeds to step SH3. In step SH3, after clearing the tempo clock register CLK to 0, the process proceeds to step SH4.

On the other hand, if the decision result in the step SH2 is "NO", that is, if the tempo clock register C
If the value of LK is not equal to one pattern time, the process proceeds to step SH4. In step SH4, it is determined whether or not the value obtained by dividing the value of the tempo clock register CLK by 4 is 0. If the result of this determination is "NO", nothing is done and the program returns to the main routine via the interrupt processing routine of FIG.

On the other hand, when the result of the determination in step SH4 is "YES", that is, when the value obtained by dividing the value of the tempo clock register CLK by 4 is 0,
Proceed to step SH5. In step SH5, the value of the count register CT determines whether equal to a constant B _MAX. If the result of this determination is "NO", nothing is done,
The program returns to the main routine via the interrupt processing routine shown in FIG.

[0044] On the other hand, when the result of judgment in step SH5 is "YES", i.e., when the value of the count register CT is equal to a constant B _MAX, the process proceeds to step SH6. In step SH6, the value of the count register CT is incremented by 1, and then the process returns to the main routine via the interrupt processing routine of FIG. The processing of steps SH4 to SH6 described above is processing for counting the value of the count register CT for each beat.

Next, a second embodiment of the present invention will be described. In this embodiment, as shown in FIG.
When a key in the right key range of the keyboard is pressed during automatic accompaniment (FIG. 12A) (FIG. 12B), automatic accompaniment is performed at a predetermined rate (for example, one level every 1/16 beat). Mute,
After a predetermined time (for example, two beats) has elapsed since the last key in the right key range was pressed, a predetermined rate (for example, 1/16
Automatic accompaniment is restored at one level per beat). As a result, even after the automatic accompaniment starts, even if the key pressed state is detected, the musical tone does not suddenly change.

Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. First, the configuration of the electronic musical instrument is the same as that of the first embodiment. Since the operation is almost the same as that of the first embodiment, only the mute processing routine of the CPU 2 which is a feature of this embodiment will be described. The processing of the CPU 2 is performed in step SE1 of FIG.
When the process proceeds to, the mute processing routine shown in FIG. 13 is started. The CPU 2 first proceeds to step SF101,
The value of the count register CT is the style number S shown in FIG.
It is determined whether or not the value is equal to or greater than the value of the mute delay MTDD of the track number TR in the style table STLTBL of the TLN. That is, it is determined whether or not the time to release the mute has been reached. If this determination is "NO", the flow proceeds to step SF102.

In step SF102, the style number S
Whether the mute level MTLD of the track number TR in the style table STLTBL of the TLN is FF _H ,
That is, it is determined whether to completely mute or simply lower the level. If the result of this determination is “NO”, the flow proceeds to step SF103. Step SF10
In No. 3, after storing the value stored in the register VLM with a sign (-) in the target register TGT, the process proceeds to step SF105.

On the other hand, if the decision result in the step SF102 is "YES", that is, the style number STLN
If the mute level MTLD of the track number TR in the style table STLTBL is FF _H , the process proceeds to step SF104. In step SF104, the value of the offset volume OVLD of the track number TR of the style table STLTBL of the style number STLN and the mute level MTLD are stored in the target register TGT.
After storing the value obtained by adding the value of
Proceed to.

In step SF105, the register VOL
After decrementing 1 from the value of V (TR), the process proceeds to step SF106. In step SF106, it is determined whether or not the value of the register VOLV (TR) is smaller than the value stored in the target register TGT. If the result of this determination is “NO”, the process returns to the reproduction process routine of FIG. 7 without doing anything, and proceeds to step SE2.

On the other hand, if the decision result in the step SF106 is "YES", that is, the register VOLV (T
If the value of R) is smaller than the value stored in the target register TGT, the process proceeds to Step SF107. In step SF107, after the value stored in the target register TGT is stored in the register VOLV (TR), the process returns to the reproduction processing routine of FIG. 7 and proceeds to step SE2.

If the decision result in the step SF101 is "YES", that is, if the value of the count register CT is the style table STL of the style number STLN.
Mute delay MTDD of track number TR of TBL
If the value is equal to or more than the value, the process proceeds to step SF108.
In step SF108, the value of the register VOLV (TR) is incremented by 1, and the process proceeds to step SF109.

In step SF109, the register VOL
It is determined whether or not the value of V (TR) is equal to or greater than the value of the offset volume OVLD of the track number TR in the style table STLTBL of the style number STLN. If the result of this determination is “NO”, the process returns to the reproduction process routine of FIG. 7 without doing anything, and proceeds to step SE2. On the other hand, if the decision result in the step SF109 is "YES", that is, if the value of the register VOLV (TR) is equal to or larger than the value of the offset volume OVLD of the track number TR in the style table STLTBL of the style number STLN, the step is performed. Proceed to SF110. In step SF110, the value of the offset volume OVLD of the track number TR of the style table STLTBL of the style number STLN is stored in the register VOLV (TR), and the process returns to the reproduction processing routine of FIG. 7 and proceeds to step SE2.

In the above-described embodiment, when a key in the right key range of the keyboard is pressed during automatic accompaniment, the automatic accompaniment is muted immediately or at a predetermined rate, and the last key in the right key range is depressed. An example is shown in which the automatic accompaniment is restored at a predetermined rate after a predetermined time has elapsed since the key was pressed, but after a predetermined time has elapsed since the last key in the right key range was released, the automatic accompaniment was resumed at a predetermined rate. May be restored. Further, in the above-described embodiment, an example in which the volume control is not performed for the sound being generated is described. However, the volume control may also be performed for the sound generated. Further, in the embodiment described above,
Although an example in which the mute fade-in / fade-out is controlled at a constant rate has been described, mute / mute return may be performed within a fixed time.

[0054]

As described above, according to the present invention, the start of key operation is detected during automatic accompaniment playback.
At this point, the volume of the automatic accompaniment sound is changed and the key operation is
The elapsed time from the key operation detection time without the time detection
When the fixed time is reached, the volume of the auto-accompaniment sound starts to return, so even if the key pressed state is detected after the auto-accompaniment starts, the auto-accompaniment does not change suddenly, and the flow becomes natural. effective. Therefore, it does not give an unnatural feeling to the player and the audience.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electronic musical instrument according to first and second embodiments of the present invention.

FIG. 2 is a diagram showing an example of a configuration of a table for each style stored in a working memory 5 of FIG.

FIG. 3 is a flowchart illustrating a process of a main routine of a CPU 2 of the electronic musical instrument according to the first and second embodiments of the present invention.

FIG. 4 is a flowchart showing a key event process of the CPU 2 of the electronic musical instrument according to the first and second embodiments of the present invention.

FIG. 5 is a flowchart showing a switch event process of the CPU 2 of the electronic musical instrument according to the first and second embodiments of the present invention.

FIG. 6 is a flowchart showing an interrupt process of the CPU 2 of the electronic musical instrument according to the first and second embodiments of the present invention.

FIG. 7 is a flowchart showing a reproduction process of the CPU 2 of the electronic musical instrument according to the first and second embodiments of the present invention.

FIG. 8 is a diagram showing a C of the electronic musical instrument according to the first embodiment of the present invention;
It is a flowchart showing the mute process of PU2.

FIG. 9 is a flowchart showing note data processing of the CPU 2 of the electronic musical instrument according to the first and second embodiments of the present invention.

FIG. 10 is a flowchart illustrating a count process of a CPU 2 of the electronic musical instrument according to the first and second embodiments of the present invention.

FIG. 11 is a diagram for explaining a method of muting automatic accompaniment according to the first embodiment of the present invention.

FIG. 12 is a diagram for explaining a method of muting automatic accompaniment according to a second embodiment of the present invention.

FIG. 13 is a flowchart showing a mute process of the CPU 2 of the electronic musical instrument according to the second embodiment of the present invention.

[Explanation of symbols]

1 ... microcomputer, 2 ... CPU, 3 ... tempo clock generation circuit, 4 ... program memory, 5 ...
… Working memory, 6… accompaniment data memory, 7…
Keyboard 7a Left key range 7b Right key range 8 Key press detection circuit 9 Operation panel 9a Master volume 9b Start switch 9c Stop switch 9d Style switch, 10: switch operation detection circuit, 11: musical tone signal forming circuit, 12: amplifier, 13: speaker.

Claims (3)

(57) [Claims] 1. An electronic musical instrument having a keyboard and an automatic accompaniment function, comprising: key operation detecting means for detecting a key operation on the keyboard; and time-measuring means for counting time during automatic accompaniment playback , wherein the key operation detecting means starts counting every time the key operation is discovered by
And a volume control means for controlling the volume of the automatic accompaniment sound. The key operation detection means detects the start of the key operation during the automatic accompaniment playback. When the volume of the automatic accompaniment tone in the automatic accompaniment playing change controlled by said volume control means, or <br/>, before SL when the elapsed time measured by the timer means reaches a predetermined time, the An electronic musical instrument, wherein the volume control means controls to start recovery of the volume of the automatic accompaniment sound under the change control. 2. The automatic accompaniment function includes an automatic multi-track accompaniment function.
A time setting means having an accompaniment function using an accompaniment pattern and setting the predetermined time for each track;
Further, the volume control means includes the predetermined volume set for each track.
Controlling the return of the volume of the automatic accompaniment sound according to time.
The electronic musical instrument according to claim 1, wherein: 3. The automatic accompaniment function includes a plurality of tracks.
A volume setting function that has an accompaniment function using an accompaniment pattern and sets the volume value to be changed for each track.
Further comprising a step, wherein the volume control means is configured to set the volume set for each track.
Change control and return control of the volume of the automatic accompaniment sound according to the value
The electronic musical instrument according to claim 1, wherein the electronic musical instrument is controlled.