JPH05100672A - Automatic keying electronic musical instrument - Google Patents

Abstract

PURPOSE:To carry on automatic performance and automatic keying without stopping the automatic performance even when manual keying is performed while the automatic performance and automatic keying are performed. CONSTITUTION:It is decided whether or not the sound of user keying which is manual keying by a user is generated (step 5) and when it is decided that the sound is not generated, a moving circuit stops the sound generation of the key other than an automatically pressed key, i.e., manually pressed key. Further, if it is decided that the sound of the key operated by the user is generated, it is decided whether or not there is a margin about sound generation channels of a musical sound generating circuit (step 7). When there is the margin, the user operated key is detected and corresponding data is sent to a musical sound generating circuit to generate the musical sound corresponding to the manually operated key (step 8). When there is no margin, on the other hand, the process in a step 8 is not performed and the musical sound corresponding to the manually operated key is therefore not generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic keyboard instrument for automatically playing a key while driving a key based on sequentially read automatic performance information.

[0002]

2. Description of the Related Art Conventionally, as an acoustic piano, it is known that a plurality of keys provided on a keyboard are mechanically and automatically pressed to automatically perform a performance by producing a sound corresponding to the pressed keys. As described above, an electronic musical instrument can be used as a musical instrument capable of performing automatic performance while automatically pressing a key. By automatically reading out the stored automatic performance information and driving the key, and by generating a musical tone corresponding to the driven key, it is possible to simultaneously perform automatic key depression and automatic performance. Of course, even in an electronic musical instrument that can perform automatic key depression and automatic performance as described above, if the user manually presses the key, it is possible to generate a musical tone corresponding to the manual key depression. .. Therefore, various playing modes can be obtained, such as manually pressing the accompaniment while the melody is automatically played and automatically pressed, or manually pressing the melody while the accompaniment is automatically played and automatically pressed. be able to.

At this time, in the sound generation processing necessary for executing the automatic performance and the sound generation processing corresponding to the manual key depression, the performance information of the automatic performance and the performance information of the manual key depression are assigned to a plurality of sound generation channels of the sound source. It is done for each pronunciation channel. Therefore, in an electronic musical instrument, the polyphony number is limited by the number of sounding channels of the sound source, and if the polyphonic sound source has 8 polyphonic channels, the maximum polyphony is limited to 8 and 16 With a polyphonic sound source having 16 sound channels, the number of simultaneous sounds is limited to 16.

[0004]

As described above, in the electronic musical instrument, performance information is assigned to each sound generation channel for sound generation, and the number of simultaneous sound generation is limited by the number of sound generation channels of the sound source. When the user manually presses a key while the automatic key is being pressed, and when the number of simultaneous polyphonies reaches the number of sounding channels of the sound source at this point, the performance information of the next automatic performance is changed to the sounding channel. It becomes impossible to allocate. Therefore, if manual key pressing is performed while automatic performance and automatic key pressing are being performed, it becomes impossible to assign the next performance information of the automatic performance to the sound generation channel, and as a result, the automatic performance stops. At the same time, the automatic key depression that is being performed together with the automatic performance may stop.

The present invention has been made in view of such conventional problems, and the automatic performance is stopped even when the manual key pressing is performed while the automatic performance and the automatic key pressing are being performed. It is an object of the present invention to provide an automatic key-depressing electronic musical instrument that can be continued without being caused to do so.

[0006]

In order to solve the above-mentioned problems, the present invention stores a keyboard having a plurality of keys arranged in pitch order and a series of performance information necessary for execution of automatic performance. Storage means, key driving means for driving the keys in accordance with performance information sequentially read from the storage means, key pressing detection means for scanning the keyboard and detecting keys pressed by manual operation, and the storage means. From the musical performance information sequentially read from the musical tone generating means, the musical tone generating means generating the musical tone corresponding to the key detected by the key depression detecting means, and the musical tone generating means generating the musical tone based on the musical performance information. When a manual operation of the key is detected in a state where the key is operated, a sound generation control means for preventing the tone generation of the tone generation means corresponding to the manually operated key is provided. That.

[0007]

In the above structure, when the performance information is sequentially read from the storage means, the key is driven in accordance with the performance information, and the automatic performance is executed based on the read performance information. Therefore, not only the music composed of the performance information stored in the storage means is automatically played, but also in synchronization with the progress of the automatically played music, a key corresponding to each musical sound constituting the music is set. The keys are automatically pressed as if they were pressed.

When the key is manually operated and the key is manually pressed while the key is being driven and the automatic performance is being performed, generation of a musical tone corresponding to the manual key is prevented. .. Therefore, in an electronic musical instrument in which the number of simultaneous pronunciations is limited by the number of pronunciation channels, the performance information of manual key depression is not assigned to the pronunciation channel during execution of automatic performance, and the performance information of this manual key depression is assigned. Therefore, it is possible to assign the performance information of the automatic performance to the sounding channel.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. That is, FIG. 1 is a block diagram showing an overall configuration of an automatic key-depressing electronic musical instrument according to an embodiment of the present invention, in which a CPU 1 stores data stored in a ROM 2,
Based on the program and the data temporarily stored in the data RAM 3, etc., all the processes necessary for this electronic keyboard instrument are executed. The external storage device 5 is a removable recording medium such as a floppy disk, a ROM, a RAM, a magneto-optical disk, etc., and stores moving data for automatic performance. The moving data for automatic performance is continuous data in which the data of each note constituting the melody part and accompaniment part of the music is stored with a predetermined number of bits for each address, and the automatic performance data ( Pitch, tone length, effect) and moving key depression data used when driving keys on the keyboard. The moving data for automatic performance is read out by the CPU 1, temporarily stored in the work area of the data RAM 3, and inputted to the tone generation circuit 6 having a plurality of tone generation channels for tone generation processing.

The CPU 1 controls the moving circuit 7 based on the performance information, and the moving circuit 7 is provided on the keyboard 8 shown in FIG. 2 via an actuator such as a solenoid plunger (not shown). Key 9
... are individually driven. The operating state of each key 9 ... Is scanned and detected by the key scan control unit 10, and the detection result is input to the CPU 1, and
The scanning operation of the key scan control unit 10 is C
It is controlled by PU1. Further, the CPU 1 executes control related to musical tone generation according to the operation information given from the mode selection switch group 4, and controls the display state of the display unit 12.

The mode selection switch group 4 includes a melody moving mode switch 13, an accompaniment moving mode switch 14, a normal moving mode switch 15 and a super moving mode switch 16 arranged on the instrument main body 11 having the keyboard 8. It is provided. In addition, the mode switch 13 is provided on the display unit 12.
Display LEDs 17 to 20 provided in the vicinity of 16 to 16 and a plurality of guide LEDs provided corresponding to each key 9.
21 ... are provided.

The melody moving switch 13 is
A switch operated to set the melody moving mode. When the melody moving mode is set, only the melody part is automatically played and keys are automatically pressed by the melody data of the moving data for automatic performance. When this melody moving mode is set, the keyboard 8 is split into a melody key area A on the low tone side and a user key depression area B on the high tone side as shown in FIG. To be done.

The accompaniment moving mode switch 14
Is a switch that is operated to set the accompaniment moving mode.When this accompaniment moving mode is set, only the accompaniment part is automatically played and automatically pressed by the accompaniment data of the moving data for automatic performance. It
Further, when the accompaniment moving mode is set, the keyboard 8 is split into a user key depression area A on the lower tone side and an accompaniment key area B on the higher tone side as shown in FIG. To be done.

The normal moving mode switch 1
Reference numeral 6 denotes a switch operated to set the normal moving mode. When the accompaniment moving mode is set, 6 is selected from the melody part and the accompaniment part by the melody data of the automatic performance moving data and the accompaniment data. The entire music piece is automatically played and automatically pressed. The supermoving switch 16 is a switch operated to set the supermoving mode, and the contents of the supermoving mode will be described later.

Next, the operation of this embodiment having the above-mentioned configuration will be described with reference to the flowcharts showing the outline of the programs executed by the CPU 1 of FIGS. That is, the flowcharts shown in FIGS. 3 to 5 are automatic performance routines executed by interrupting the main flow (not shown). The CPU 1 starts the control according to this flowchart on condition that one of the mode switches 13 to 15 is operated to set the melody moving mode, accompaniment moving mode, and normal moving mode which are the automatic performance modes. The initial value of the read address of the moving data for automatic performance is set (step 1). That is, the external storage device 5 including the above-mentioned floppy disk and the like stores a plurality of automatic performance moving data and necessary control data. Therefore, the song No. selected in advance by a song selection switch (not shown). In order to start the reading of the automatic performance moving data, the start address is set in the work area of the data RAM 3.

Subsequently, other processing is executed (step 2) to fetch the control data, set the tone color, set the rhythm pattern, set the volume, set the effector, set the mode, or perform internal processing corresponding to MIDI. And the like, and the necessary processing related to the execution of this flowchart. Then, it is determined whether or not the address of the moving data for automatic performance is newly set (step 3). That is, steps 24 and 2 described later.
By the processing of 5,26, the moving data for automatic performance is
The address of the data to be read next is set every time the sound long time included in the data elapses. Therefore, if the determination in step 3 is NO and the address of the moving data for automatic performance is not set next, the process proceeds to step 5 without performing the process of step 4, and if the address is set, The automatic performance moving data stored at the set address is read from the external storage device 5 (step 4).

Next, in step 5, it is judged whether or not a sound is to be produced in response to a key press made by the user. If it is judged that no sound is to be produced, the moving circuit 7 automatically presses the key. Sounds other than the above are stopped (step 6). Therefore, by the processing of step 6, the musical tone corresponding to the manual key depression by the user is stopped, and only the musical tone corresponding to the key automatically depressed by the moving circuit 7 is generated from the musical tone generating circuit 6. Here, the process of step 5 may be to instantaneously stop the musical tone corresponding to the user's manual key depression, but if the generated musical tone is instantaneously stopped, an uncomfortable feeling is generated. It is preferable to fade out at a time corresponding to the volume. However, in order to ensure the sound generation channel used for the automatic performance, it is necessary to stop the musical sound corresponding to the manual key depression promptly. In other words, when using a continuous sound such as an organ sound, unless the user releases the key, the sound generation channel remains assigned with the performance information and cannot be used for automatic performance. .. Further, in the case of a tone color having a long lingering sound, even after the user releases the key, the state where the tone generation channel is used continues for a while, so that the tone generation channel cannot be used for automatic performance during that time. Therefore, the process of step 6 needs to be stopped for a time length corresponding to the characteristic of the musical tone generated by the manual key depression so as not to cause discomfort.

On the other hand, when it is determined in step 5 that the user's key is to be sounded, it is further determined whether or not there is a margin in the sounding channel (step 7). Specifically, the determination in step 7 is made by comparing the number of tone generation channels provided in the tone generation circuit 6 with the number of tone generation channels currently used. For example, when the tone generation circuit 6 has 16 tone generation channels, it can be considered that there is a margin if the number of currently used tone generation channels is about 10.

If it is determined in step 7 that the tone generation channel has no margin, the process proceeds to step 9 without performing the process of step 8, and if it is determined that the tone generation channel has margin. 8 is performed. Step 8 is a process of detecting a user key depression and sending the corresponding data to the tone generation circuit 6.
U1 obtains key depression data indicating which key is depressed based on the key depression information from the key scan control unit 10. The key press data provided from the key scan control unit 10 includes not only the data manually pressed by the user but also the data automatically pressed by the moving circuit 7. However, the moving circuit 7 is a CPU
Since the key 9 is driven by the moving key depression data from 1, the key 9 driven by the moving circuit 7 in the CPU 1 is known. Therefore, the key-depression data obtained by the key scan is sent excluding the key-depression data indicating the key driven by the moving circuit 7, so that only the key-depression data corresponding to the user key-depression is sent to the tone generation circuit 6. Can be sent.

The reason why the key depression data of the key 9 driven by the moving circuit 7 is excluded is as follows. That is, in this embodiment, step 21 described later is performed.
As shown in FIGS. 23 to 23, the timing at which the key 9 moves in the automatic key depression is shifted from the sound generation timing so that the sense of incongruity does not occur in the relationship between the automatic key depression and the sound generation timing. It cannot be processed in the same way as key depression. In addition, steps 21 to 2 described later
In step 3, since the tone generation process corresponding to the automatic key depression is performed in step 22, if the musical tone corresponding to the automatic key depression is generated at this point, the musical tone corresponding to one automatic performance data is generated twice. , It becomes impossible to automatically play music properly. Therefore, in this step 8,
Generates only the musical sound corresponding to the user's key press.

In step 9 following step 8,
It is determined whether or not a new timing for moving has arrived, and by the determination in step 9, the tempo of the music being automatically played and automatically pressed (moving) is appropriately maintained. Then, when it is the time to newly move, it is determined whether the mode is the melody moving mode, the accompaniment moving mode, or the normal moving mode (step 10 in FIG. 4). When the melody moving mode is set, it is judged whether or not the moving timing of the melody data, which is the data of the melody part of the moving data for automatic performance, comes (step 11). If this determination is YES and it is the moving timing of the melody data, it is determined whether or not the moving pitch data indicates the melody area determined by the keyboard split (step 12).

That is, in the present embodiment, when the melody moving mode switch 13 is pressed as described above, as shown in FIG. 2, the melody key range A on the lower tone side of the key with the predetermined pitch and the high tone. The user key depression area B on the side is split. If the moving pitch data is in the melody key area A, there is no problem. However, if the moving pitch data is in the user key pressing area B, the user can play the melody in the user key pressing area B. When the accompaniment performance is being performed along with
The keys inside will be moved, making it difficult to play. Therefore, when the melody bing mode is selected, only when the moving pitch data is in the melody key area A is valid, and the process proceeds to step 16, and when it is not in the melody key area A, the keyboard is pressed. The split error flag is set to "1" (step 15).

On the other hand, when the accompaniment moving mode is set in the determination of step 10, it is determined whether or not the moving timing of the accompaniment data, which is the data of the accompaniment part of the moving data for automatic performance, comes (step). 13). When the moving timing of the accompaniment data is reached, it is determined whether or not the moving pitch data indicates the accompaniment area determined by the keyboard split (step 14).

That is, when the accompaniment move switch 14 is pressed as described above, the key is divided into a user key depression area A on the low tone side and an accompaniment area B on the high tone side of a key with a predetermined tone pitch. If the moving pitch data is in the accompaniment key area B, there is no problem. However, if the moving pitch data is in the user key pressing area A, the user plays in the user key pressing area A. In addition to this, when the melody performance is being performed, the keys in the user key depression area A are moved, making it difficult to perform the melody performance. Therefore, when the accompaniment moving mode is selected,
Only when the moving pitch data is in the accompaniment key range B is valid, the process proceeds to step 16, and the melody key range A is set.
If not present, the keyboard split error flag is set to "1" (step 15).

Next, at step 16, it is judged whether or not the super moving mode is set, and if the super moving mode is set in advance, the range that the user is still playing and the range that the moving circuit 7 is about to press a key. Is determined to be the same or near (step 18). This super moving mode is effective only when the musical range being played by the user and the musical range in which the moving circuit 7 is about to press a key are the same or close to each other. It is determined in step 18 whether or not exists. If this state exists, the moving key depression data (pitch portion) is shifted or transposed by the octave unit in the next step 19 (however, the tone sent to the tone generation circuit 6). High data remains unchanged). For example, if the pitch of the moving key depression data is C4, it is shifted to C5, C3, or C2.

That is, when the processing content executed in step 19 is the content of the super-moving mode and the musical range being played by the user and the musical range to be pressed by the moving circuit 7 are the same or close to each other. , The pitch of moving key press data is shifted or transposed. At this time, the pitch is shifted or transposed only for the moving key depression data, and the pitch data sent to the musical tone generation circuit 6 remains unchanged. Therefore, the pitch of the automatic performance itself is shifted or transposed. There is no pause, and the automatic performance is executed at a predetermined pitch.

On the other hand, if the result of the determination in step 16 is that the super moving mode is not set, it is determined whether or not the keyboard split error flag is 0 (step 17). If this determination is YES and the keyboard split error flag is 0, the moving data for automatic performance is outside the user's key depression area indicated by the key depression split. It does not get in the way of key depression. Therefore, in this case, a display indicating the key to be moved is displayed (step 2 in FIG. 5).
0), and the corresponding key is pressed by the moving circuit 7 (step 21). In this step 20, the guide LED 21 (see FIG. 2) corresponding to the key to be moved is turned on or blinked, and in step 21, the CPU 1 passes the moving key pressing data to the moving circuit 7, and the moving key is moved. The circuit 7 selects a key based on the data from the CPU 1 and drives the key with a specified strength.

If the keyboard split error flag is 1 in the determination in step 17, the moving data for automatic performance is in the user key pressing area indicated by the key pressing split, and therefore the key is moved. It interferes with the user's key depression. Therefore, the processing of steps 20 and 21 described above is not executed, and as a result, the moving corresponding to the moving key depression data is not performed. In other words, if the automatic performance moving data is within the user key pressing area indicated by the key pressing split, the moving operation corresponding to the automatic performance moving data is not performed, thereby ensuring the user's ease of key pressing. To do.

Then, step 17 or step 21
In step 22 following, a process of waiting for a predetermined time is performed corresponding to the tone color, and when this predetermined time has elapsed, the automatic performance moving data is sent to the tone generation circuit 6 (step 23). Therefore, by the processing of this step 23,
The tone generation circuit 6 uses automatic performance data (pitch, duration, effects)
According to the automatic performance data, a musical tone having a pitch, a tone length and an effect is generated. At this time, by the processing of step 22, the musical sound is generated with a delay of a predetermined time from the timing when the automatic key depression is started.

That is, if a musical tone is generated at the same time when the automatic key pressing is started, there is a possibility that the moving circuit 7 may sound before the automatic key pressing is sufficiently performed. The time lag from key depression to the start of sounding also differs depending on the timbre. Therefore, the musical tone is generated a predetermined time after the automatic key pressing is performed, so that the timing between the automatic key pressing and the generated musical tone becomes natural, and a natural automatic key pressing state corresponding to the tone color is formed.

Further, step 24 following step 23
Then, the key depressing by the moving circuit 7 of the key after a predetermined time (tone length) has passed is stopped, and the sound generation is stopped. That is, in this step 23, the time during which all the keys automatically pressed by the moving circuit 7 are detected automatically, and the time during which each key is automatically pressed and the key pressing data (sound length) are detected. ) And. Then, if there is a key that is driven for a time corresponding to the tone length of the key pressing data among the keys that are automatically pressed, the CPU 1 instructs the moving circuit 7 to move the key. Instruct to finish, and also to the tone generation circuit 6,
Instruct to finish pronunciation. Therefore, every time the sounding time of the corresponding moving data elapses by the processing of this step 23, the automatic key depression of the corresponding key ends and the generation of the musical sound also ends.

Subsequently, it is judged whether or not it is time to read the next automatic performance moving data (step 2).
5). This step 25 is performed on the basis of whether or not a certain amount of moving data for automatic performance is stored in the writing area for the moving data for automatic performance facilitated in the work area of the data RAM 3, and the automatic performance for a certain amount or more is performed. If the moving data for use is stored, the determination is NO, and if not, the determination is YES. That is, the moving data for automatic performance is read out from the external storage device 5, once written in the write area of the data RAM 3, and then read out from the data RAM 3 and processed by the CPU 1. However, for example, when the automatic performance moving data having a long note length continues, the frequency with which the CPU 1 reads the automatic performance moving data from the data RAM 3 decreases, and at this time, the automatic performance moving data is externally stored at regular intervals. When the data is read from the device 5 and stored in the data RAM 3, the data RAM 3 overflows. For this reason,
The address of the next data to be read is set only when it is time to read the moving data for automatic performance by the determination in step 25 (step 26).

Therefore, by the process of step 26, the data RAM 3 is read out from the external storage device 5 next.
The data to be stored in is specified. In this way, by indicating the data to be stored next by address, when the automatic performance moving data is not stored in consecutive addresses in the external storage device 5, or when the control data etc. are included in the middle of the data. Even if, the data RAM for the next automatic performance moving data is read properly.
3 can be stored.

Then, in the final step of this flow, it is judged whether or not the music currently being automatically played is over (step 27), and if it is in the middle of the music, the above-mentioned judgment processing from step 2 is repeated. .. When all the moving data for automatic performance of the music is read and the moving operation and the automatic performance are all finished, EN
The process proceeds to D and the main flow returns.

The means for preventing the generation of the musical sound corresponding to the user's key depression can be realized by the following processes (1) and (2). (1) The key scan control unit 10 is controlled to stop the key scan on the keyboard 8. (2) The key scan is performed, but the performance information corresponding to the user's manual key depression detected by the key scan control unit 10 is not supplied to the tone generation circuit 6. Then, in the present embodiment, (1) is adopted, and when the determination in step 5 or 7 is NO, the process of step 8 is not performed, that is, the key scan is not performed, so that the user presses the key. It prevents the generation of musical sounds. In the case of (1), since the CPU 1 always holds the data for automatic performance for controlling the moving circuit 7, even if the key scan on the keyboard 8 is stopped, the data for automatic performance is disturbed. No tone generation circuit 6
Can be supplied to. Therefore, even if the key scan is stopped, the automatic performance and the automatic key depression can be performed without any trouble.

In the processing of (2), since the CPU 1 always holds the key-playing data for the automatic performance, the moving-data for the automatic performance is sent to the tone generating circuit 6 and the key-pressing data by the key scan is sent. It becomes feasible by not sending. Moreover, according to (2), since the key scan itself is performed, the CPU 1 obtains the key depression data of the user. Therefore, it is possible to have a processing procedure in which the user's key depression is sounded only when the sound generation channel has a margin, and it is possible to cope with various specifications.

Further, in the above-described embodiment, if there is no room in the sounding channel, the process of step 8 is not performed, so that the musical tone corresponding to the user's key depression is not generated, and the user's intention to perform is desired. Will result in ignoring. Therefore, for example, if a user priority mode is provided and the user presses a key when there is no room in the sound generation channel, the musical sound that has already been pronounced is promptly terminated and the musical sound corresponding to the user pressing the key is generated. You may make it secure the sound generation channel for.

Further, in the above-described embodiment, the corresponding key is automatically pressed by the moving circuit 7 in step 21, and then the moving data for automatic performance is sent to the musical tone generating circuit 6 to be sounded in step 23. .. But,
Although it is a special case, in some tones, the rise of the sound may be very slow because it is an electronic musical instrument. In the case of such a tone color, if the processing procedure is such that the automatic performance moving data is sent to the musical tone generating circuit 7 first to generate a musical tone and then the key is automatically pressed by the moving circuit 7.
This allows automatic performance with a natural feel according to the timbre.

[0039]

As described above, the present invention corresponds to the manual key depression when the manual key depression is performed in the state where the automatic performance and the automatic key depression are performed based on the performance information stored in advance. I did not generate a musical sound. Therefore, it is possible to prevent the number of simultaneous sound generation from reaching the number of sound generation channels of the sound source due to the generation of a musical sound corresponding to the manual key depression. As a result, it is possible to always assign the performance information to the sounding channel, and it is possible to eliminate the inconvenience of stopping the automatic performance and the automatic key pressing by the manual key pressing.

Further, when the sound generation channel has a margin, since the musical tone corresponding to the manual key depression is generated, the disadvantage that the automatic performance and the automatic key depression are stopped by the manual key depression is solved. At the same time, it is possible to generate a musical sound corresponding to manual key depression. Further, by stopping the keyboard scanning of the key-depression detecting means for detecting the manual key depression so that the musical tone corresponding to the manual key depression is not generated, the musical tone corresponding to the manual operation can be performed without complicated control. Can be prevented. Further, since the process of sending the detection result of the manual key depression to the musical tone generation means is stopped to prevent the musical tone from being generated in the manual key depression, the detection of the manually depressed key itself is performed. Therefore, it is possible to support various specifications such as generating a musical tone corresponding to manual key depression according to the usage state of the sounding channel.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is an external plan view of the musical instrument body of the embodiment.

FIG. 3 is a part of a flowchart showing a processing procedure at the time of automatic performance of the embodiment.

FIG. 4 is a flowchart following FIG.

FIG. 5 is a flowchart following FIG.

[Explanation of symbols]

 1 CPU 2 ROM 3 Data RAM 5 External Storage Device 6 Music Generation Circuit 7 Moving Circuit 8 Keyboard 10 Key Scan Control Section 13 Melody Moving Switch 14 Accompaniment Moving Switch 15 Normal Moving Switch 16 Super Moving Switch

Claims (4)

[Claims] 1. A keyboard having a plurality of keys arranged in pitch order, storage means for storing a series of performance information necessary for execution of automatic performance, and the keys according to the performance information sequentially read from the storage means. Key driving means for driving, key pressing detecting means for scanning the keyboard and detecting keys pressed by a manual operation, generating musical tones based on performance information sequentially read from the memory means, and pressing the key. When a manual operation of the key is detected in a state where the musical tone generating means for generating a musical tone corresponding to the key detected by the key detecting means, and the musical tone generating means generating a musical tone based on the performance information, An automatic key-depressing electronic musical instrument comprising: a sound generation control means for preventing the generation of a musical sound of the musical sound generating means corresponding to the manually operated key. 2. The tone generation control means generates a tone corresponding to the manually operated key only when the tone generation means generates a tone based on the performance information in a predetermined number or more tone generation channels. The automatic key-depressing electronic musical instrument according to claim 1, characterized in that it is prevented from occurring. 3. The automatic key-depressing electronic musical instrument according to claim 1, wherein the tone generation control means stops the generation of the musical sound by stopping the keyboard scanning of the key-depression detecting means. 4. The tone generation control means prevents generation of the musical sound by stopping the process of sending the detection result of the key depression detection means to the musical sound generation means. Automatic key press electronic musical instrument.