JP2001209379A - Electronic instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic instrument capable of visually satisfying a listener even when sounding start information and sounding halt information are given to a key during operation of the key. SOLUTION: This electronic instrument receives instructions to start and stop sounding from an external sequencer by a MIDI interface 14, and performs automatic playing by producing musical sound by a sound production control part 16 and emitting the sound from a loudspeaker 17, and makes a key drive control part 15 operate keys 21a in synchronism with the emission of the musical sound by solenoids 23 and detects key press action and completion of key release action of the keys in operation by a key switch 21b, and when it is instructed to stop sounding during key press action, the instrument stores the sounding stop instruction in a RAM, and performs key release action by executing the stored sounding stop instruction in timing of the end of the key press action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument having a keyboard on which a plurality of keys are arranged.

[0002]

2. Description of the Related Art Conventionally, there has been known an electronic musical instrument in which each key of a keyboard is driven by a solenoid. In such an electronic musical instrument, a key is driven by inputting a tone generation start instruction and a sound generation stop instruction from an external sequencer or the like, and turning on and off a solenoid based on the input sound generation start instruction and sound generation stop instruction. At the same time, in consideration of a delay time due to a mechanical response delay such as a stroke of a solenoid of the key, a sound source is driven by musical sound instruction information delayed for a predetermined time.

[0003]

However, if there is sounding start information and sounding stop information in a relatively short time during the operation of a certain key, the key is not completely depressed. Since the key release is started or the key press is started before the key is completely released, there is a disadvantage that the movement of the key is incompletely reproduced.

[0004] In particular, when a key is operated multiple times in a relatively short time while the key is operating, such as in a trill playing technique, the key is completely depressed. Key release before the key is completely released and key depression before the key is completely released are repeated in a short time, so that the key trembles with a short stroke And behaves very ugly and unsightly.

[0005] In view of the above circumstances, the present invention is intended to visually satisfy the listener even when there is sounding start information and sounding stop information in a relatively short time during operation of a certain key. It is intended to provide an electronic musical instrument that can be used.

[0006]

According to the present invention, there is provided an electronic musical instrument in which a plurality of vertically operable keys are arranged on a keyboard, and a corresponding key is depressed in response to a key depression instruction. Key driving means for releasing a corresponding key in response to a key release instruction, wherein the key driving means releases the key in response to the key pressing instruction while the corresponding key is being pressed. When an instruction is given, the key release operation is stored, and after the key is pressed to a predetermined position, the key is driven to shift to the key release operation based on the storage. It is characterized by.

In the electronic musical instrument of the present invention, when a key release instruction is given to a corresponding key while the corresponding key is being pressed in response to the key press instruction, the fact that the key release instruction is issued is stored.
After the key is depressed to a predetermined position, the key is driven to shift to the key release operation based on the memory, so the key release operation must be started after the key is completely depressed. Can be. Therefore, unlike a conventional electronic musical instrument, the key release operation is started before the key is completely depressed, and the key movement is reduced, so that the operation is not very ugly and unsightly. The movement is natural and can visually satisfy the listener.

Here, the electronic musical instrument of the present invention can be understood as follows. That is, the electronic musical instrument of the present invention comprises: (1) a keyboard in which a plurality of vertically operable keys are arranged; (2) a sounding instruction acquisition for acquiring a sounding start instruction and a sounding stop instruction for each musical tone corresponding to each key. Means (3) In response to a sounding start instruction and a sounding stop instruction from the sounding instruction acquisition means, a key corresponding to the sounding start instruction is depressed, and a key corresponding to the sounding stop instruction is released. Key driving means to be operated (4) When a new sound generation start instruction or sound generation stop instruction is issued for the driven key while the key is being driven, the new sound generation start instruction or sound generation stop instruction is stored. (5) The next operation of the key in operation is controlled according to the contents stored in the storage unit at the timing when one key press operation or key release operation is completed. Characterized by comprising the key driving control means for.

In the electronic musical instrument according to the present invention, when there is new tone generation start information or tone stop information while the key is being driven, the new tone generation start instruction or tone stop instruction is stored, and the key of the key being operated is stored. Since the next operation of the key is controlled in accordance with the contents stored in the storage means at the timing when one key pressing operation or key releasing operation is completed, the timing at which the key pressing operation is completed is determined. A key release operation can be performed, or a key press operation can be performed at the timing when the key release operation is completed. Therefore, even if there is sound generation start information and sound generation stop information in a relatively short time during the operation of the key, the next time the key is completely depressed or the key is completely released, The operation is performed.

Here, in the electronic musical instrument according to the present invention, the key drive control means outputs a final instruction relating to the key at the time when one key-pressing operation or key-release operation of the operating key is completed. It is preferable that the next operation of the key is controlled so that when the instruction is the instruction or the sound generation stop instruction, the key stops in the key pressed state or the key released state, respectively.

If the key drive control means controls the operating key as described above, there are a plurality of sounding start instructions and sounding stop instructions during the key pressing operation, and the final instruction is sounding. In the case of a stop instruction, the key release operation can be started after the key pressing operation for the key has been completely completed.
If a key is released multiple times during the key release operation and there is a sound generation stop instruction and the final instruction is a sound generation start instruction, the key release operation is completed after the key release operation is completed for that key. You can get started. Therefore, even when the sound generation start information and the sound generation stop information occur a plurality of times in a relatively short time, as represented by the trill playing method, the key release is started before the key is completely pressed. This operation and the operation of starting key depression before the key is completely released are not repeated in a short time, and the listener can be visually satisfied.

Further, in the electronic musical instrument according to the present invention, the key drive control means terminates a single key-pressing operation or a key-release operation when a predetermined time has elapsed after the operation of the operating key. It is also preferable that the next operation related to the key is controlled.

Since the operation time of the key is determined according to the characteristic of the key driving means for driving the key, a predetermined time is measured on the basis of the characteristic, and after the operation of the key is started, the predetermined time is measured. If the next operation related to the key is controlled after the passage of time, the control can be easily performed.

Further, in the electronic musical instrument of the present invention, the keyboard includes a sensor for detecting completion of a key press operation and a key release operation of each key, and the key drive control means relates to a key in operation and starts operation of the key. The next operation related to the key may be controlled by recognizing that one key press operation or key release operation of the key has been completed based on the operation completion detection state of the subsequent sensor.

With this configuration, the next operation of the key in operation can be controlled based on the completion of one key press operation and the key release operation of the key.

Further, in the electronic musical instrument of the present invention, the keyboard includes a sensor for detecting a key pressing operation of each key, and the key drive control means determines that the key pressing operation of each key is a sounding start instruction of each key. In accordance with the presence / absence and the detection state of the sensor, it is determined whether or not each key is performed in response to the sound generation start instruction, and each key is depressed regardless of the sound generation start instruction. At that time, the driving of each key may be stopped.

With this configuration, it is possible to give priority to the key operation pressed by the player over the key operation in accordance with the tone generation start instruction.

[0018]

Embodiments of the present invention will be described below.

FIG. 1 is a circuit block diagram of one embodiment of the electronic musical instrument of the present invention.

The electronic musical instrument 10 shown in FIG.
RAM 12, CPU 13, MIDI interface 14, keyboard device 20, key drive control unit 15,
A sound control unit 16 and a speaker 17 are provided.
The ROM 11, the RAM 12, the CPU 13, the MIDI interface 14, the keyboard device 20, the key drive control unit 15, and the tone generation control unit 16 are connected to each other by a bus 18. Further, a keyboard device 20 is connected to the key drive control unit 15, and a speaker 17 is connected to the sound generation control unit 16.

The ROM 11 stores a program for controlling the entire electronic musical instrument 10 shown in FIG.

The RAM 12 has an area for storing a table to be described later and a work area necessary for executing the above-described programs and the like.

The CPU 13 controls the entire electronic musical instrument 10 by reading and executing a program stored in the ROM 11.

The MIDI interface 14 obtains a tone generation start instruction and a tone generation stop instruction of each musical tone corresponding to each key 21 described later, which are output from an external sequencer. The acquired sound generation start instruction and sound generation stop instruction are stored in a RAM via a program executed by the CPU 13.
12 or input to the sound control unit 16.

The keyboard device 20 includes a keyboard 21, a key operation detecting unit 22, and a solenoid 23.

The keyboard 21 has a key 21a which can be moved up and down.
Are arranged in a plurality. The keyboard 21 is provided with a key switch 21b for detecting a key press operation and a key release operation completion of each key 21a.

The key operation detecting section 22 detects the key depression of each key 21a,
Detecting each timing and each speed of key release, the bus 18
Is notified to the CPU 13 via.

The solenoid 23 corresponds to a key driving means according to the present invention. In response to a sound generation start instruction and a sound generation stop instruction from the MIDI interface 14, each of the solenoids 23 presses a key 21a corresponding to the sound generation start instruction. And the key 21a in response to the sound generation stop instruction is released.

The key drive controller 15 will be described in detail later.
Controls the next operation of the key 21a in operation.

The sound control unit 16 includes a sound source (not shown). The sound source generates a tone based on a sound start instruction and a sound stop instruction input to the sound control unit 16. The generated musical tone is amplified by an amplifier (not shown) and then emitted from the speaker 17, whereby an automatic performance is performed. At the time of this automatic performance, a sound generation start instruction and a sound generation stop instruction are also input to the key drive control unit 15, and the key drive control unit 15 supplies power to the solenoid 23 based on the input sound generation start instruction and sound generation stop instruction. ,
By shutting off, the solenoid 23 is turned on and off. In this manner, the key 21a is automatically operated in synchronism with the emission of the musical sound from the speaker 17.

FIG. 2 is a diagram showing a key pressing operation and a key releasing operation for one key having the keyboard shown in FIG.

In FIG. 2, the horizontal axis represents time, and the vertical axis represents the vertical height of the key. The key 21a is in a completely released state before time t1. At time t1, when there is a sound generation start instruction, the key drive control unit 15 drives the solenoid 23 to depress the key 21a. The key 21a whose key pressing operation is started from the time t1 is pressed down toward a complete key pressing state as shown by a solid line A in FIG. 2 due to a time lag due to a stroke of the solenoid 23 or the like. Here, at time t2 when the key 21a is being depressed, if there is a new sound generation stop instruction for the key 21a, the key drive control unit 1
5 waits for an operation end time t3 according to the sound generation start instruction at time t1 relating to the key 21a, and waits for the key 21a.
At a time t2. Therefore, the key release operation is started after the key 21a is completely depressed at time t3. The position of the key in the completely depressed state corresponds to the "predetermined position" in the present invention.

The key 21a whose key release operation has started at time t3
Also moves upward toward the complete key release state as shown by the solid line A in FIG. 2 due to the time lag due to the stroke of the solenoid 23 and the like. Here, when there is a new sounding start instruction related to the key 21a at time t4 while the key 21a is moving upward in response to the sounding stop instruction at time t2, the key drive control unit 15 sets the key Waiting for the operation end time t5 in response to the sound generation stop instruction at time t2 relating to the key 21a, the key 21a stores the
4 to perform an operation according to the new tone generation start instruction. Therefore, the key pressing operation is started after the key 21a is completely released at time t5.

On the other hand, in the conventional electronic musical instrument, as indicated by a broken line B, the key 21a whose key pressing operation is started at time t1 is:
Since the key release operation is started at time t2 before the key is completely depressed, the movement of the key 21a becomes small, resulting in a very ugly and unsightly operation. In the present embodiment, the key release is started after the key 21a is completely released, and the key release is started after the key 21a is completely released.
Is natural and can satisfy the listener visually.

FIG. 3 is a diagram showing a key-pressing operation and a key-release operation of a key when a sound-generation start instruction and a sound-generation stop instruction are issued during the key depression operation of the key.

In response to the tone generation start instruction at time t1 shown in FIG. 3, the key 21a is depressed toward the depressed state as indicated by the solid line A. Here, there is a sound emission stop instruction at time t2 while the key 21a is being pressed, and then there is a sound generation start instruction at time t3. Key drive control unit 1
In No. 5, since the last instruction related to the key 21a at the time when one key pressing operation of the key 21a being pressed is completed is the sounding start instruction, the key 2a is stopped so that the key 21a stops in the key pressed state.
The next operation of 1a is controlled. On the other hand, in the conventional electronic musical instrument, as shown by the broken line B, the key 21a whose key pressing operation is started at time t1 starts the key releasing operation at time t2 before the key is completely pressed, and then at time t3. , The key pressing operation is started, so that the key 21a makes a small movement and the appearance is bad.

In the example shown in FIG. 3, there are three instructions of a sound generation start instruction → a sound generation stop instruction → a sound generation start instruction. However, in the case of five or more instructions (a plurality of sounds are generated during a key pressing operation). If there is a start instruction and a sound stop instruction, and the final instruction is a sound start instruction, the instruction will always be an odd number). The next operation of the key 21a is controlled so as to stop in the key pressed state. Thus, in the present embodiment,
If there are a plurality of sounding start instructions and sounding stop instructions during a key pressing operation of a key 21a, and if the final instruction is a sounding starting instruction, the key 21a is depressed so that the key 21a is completely depressed. The next operation of the key 21a is controlled. Therefore, the movement of the key 21a is natural and the listener can be visually satisfied.

FIG. 4 shows a key-pressing operation and a key-release operation of a key when there are a plurality of sounding start instructions and sounding stop instructions during a key-pressing operation of a key, and the final instruction is a sounding stop instruction. It is a figure showing an operation.

In response to the tone generation start instruction at time t1 shown in FIG. 4, the key 21a is depressed toward the depressed state as indicated by the solid line A. Here, at time t2 while the key 21a is being pressed, a sound generation stop instruction is issued, then at time t3, a sound generation start instruction is issued, and further at time t4.
There is an instruction to stop sounding. In the key drive control unit 15,
Since the final instruction related to the key 21a at the time when the single key-pressing operation of the key 21a during the key-depressing is completed is the sound generation stop instruction, the key 21a is changed from the timing at which the single key-pressing operation is completed. Key 2 so that the key release state of 21a starts.
The next operation of 1a is controlled. On the other hand, in the conventional electronic musical instrument, as shown by the broken line B, the key 21a whose key pressing operation is started at the time t1 starts the key releasing operation at the time t2 before the key is completely depressed, and further at the time t3. This time, the key pressing operation is started, and then the key releasing operation is started again at time t4, so that the key 21a trembles with a short stroke and becomes a very ugly and unsightly operation.

In the example shown in FIG. 4, there are four instructions of a sound generation start instruction → a sound generation stop instruction → a sound generation start instruction → a sound generation stop instruction. If there are a plurality of sounding start instructions and sounding stop instructions, and the final instruction is a sounding stop instruction, the instruction always becomes an even number), it does not follow all the instructions, The next operation of the key 21a is controlled so that the key release state starts in accordance with the instruction to start sounding. Therefore, key 2
Even if a plurality of sounding start instructions and sounding stop instructions are issued during the key pressing operation of the key 1a, the key 21a is unnaturally trembling with a short stroke like a conventional electronic musical instrument. This prevents the listener from visually becoming happy.

FIG. 5 is a diagram showing a table stored in the working area of the RAM shown in FIG.

The working area of the RAM 12 stores a sounding instruction flag 1, a sounding instruction flag 2, a stop flag, and a player key depression flag corresponding to each key number.

The sounding instruction flag 1 is a flag indicating whether or not the key 21a is operating. When the sounding instruction flag 1 is set ('1'), it indicates that the key 21a is operating. .

The sounding instruction flag 2 is a flag indicating that the operating key 21a is finally set to the key pressed state. When the sounding instruction flag 2 is set ('1'),
The operating key 21a is finally set to the key pressed state.

The stop instruction flag is a flag indicating that the operating key 21a is finally released from the key. If the stop instruction flag is set ('1'), the operating key 21a Is finally released.

The performer key depression flag indicates that key 21
"a" is a flag indicating whether or not the key is pressed. When the player key pressing flag is set ("1"), it indicates that the key 21a is pressed by the player.

FIG. 6 is a flowchart of a routine started when a sound generation start event occurs.

When a sound generation start event (sound generation start instruction) is sent from an external sequencer, this routine is started.

First, in step S100, the RAM
Referring to the 12 working areas, it is determined whether or not the player key depression flag corresponding to the key number of the sent sound generation start event is set. If it is determined that the player key depression flag is set, the key 21a has already been depressed by the player and the key drive control unit 15
Since there is no need to further depress the key 21a, the routine is terminated without doing anything. On the other hand, if it is determined that the performer key depression flag has been reset, step S
Proceed to 102.

In step S102, it is determined whether or not the tone generation instruction flag 1 is set by referring to the working area of the RAM 12. If it is determined that the sound generation instruction flag 1 is set, the operation of the key 21a has been started, and since it is a sound generation start instruction for the key 21a, the process proceeds to step S110, and finally the key is pressed. The sound generation instruction flag 2 is set, and this routine ends. On the other hand, when it is determined that the sounding instruction flag 1 has been reset, the process proceeds to step S104.

In step S104, it is determined whether a stop instruction flag has been set. If it is determined that the stop instruction flag has been set, this routine ends to finally put the key 21a in the key release state. On the other hand, when it is determined that the stop instruction flag has been reset, the process proceeds to step S106.

In step S106, the sound generation instruction flag 1 for indicating that the operation of the key 21a has been started is set, and the key drive control unit 15 is driven to execute the key pressing operation of the key 21a. Next, in step S108,
The sounding instruction is executed and this routine ends.

FIG. 7 is a flowchart of a routine that occurs when a sound generation stop event occurs.

When a sound generation stop event (sound generation stop instruction) is sent from an external sequencer, this routine is started.

First, in step S200, the RAM
Referring to the 12 working areas, it is determined whether or not the player key depression flag corresponding to the key number of the sent sound generation stop event is set. If it is determined that the performer's key press flag is set, the key 21a has already been pressed by the performer, so this routine ends without performing any operation. On the other hand, if it is determined that the player key depression flag has been reset, the process proceeds to step S202.

In step S202, the tone generation instruction flag 2 is reset to prevent the key 21a from being finally depressed. Next, the process proceeds to step S204.

In step S204, it is determined whether a stop instruction flag corresponding to the key number has been set. If it is determined that the stop instruction flag has been set, this routine ends without doing anything. On the other hand, if it is determined that the stop instruction flag has been reset, the process proceeds to step S206, and the stop instruction flag is set to finally bring the operating key 21a into the key release state.

Next, in step S207, it is determined whether or not the tone generation instruction flag 1 corresponding to the key number has been set. If it is determined that the sounding instruction flag 1 is set, this routine is terminated without doing anything.
On the other hand, if it is determined that the tone generation instruction flag 1 has been reset, a stop instruction is executed in step S208, and this routine ends. As a result, the key drive control unit 15 is driven to perform the key release operation of the key 21a.

FIG. 8 is a flowchart of a routine started when a keyboard press event occurs.

The key depression event is performed by the player or the key drive control unit 15 via the solenoid 23 by the key 21.
This occurs when the key switch 21b of a is turned on.

First, in step S300, the RAM
12 working area, and depressed key 21a
It is determined whether or not the sound generation instruction flag 1 corresponding to the key number is set. If it is determined that the sounding instruction flag 1 is reset, the key switch 21b of the key 21a is turned on even though the sounding instruction is not issued from the sequencer. Proceed to step S302. In step S302, the performer key depression flag corresponding to the key number is set, and this routine ends.

On the other hand, if it is determined in step S300 that the sound generation instruction flag 1 is set, the key 21a is driven by the sound generation instruction from the sequencer, and
As a result, the key switch 21b is turned on, so that the key 21
a is regarded as being completely depressed, and step S304 is performed.
To reset the sounding instruction flag 1 indicating that the key 21a is operating. Next, the process proceeds to step S306.

In step S306, it is determined whether a stop instruction flag corresponding to the key number has been set. If it is determined that the stop instruction flag has been reset, this routine ends without doing anything. On the other hand, if it is determined that the stop instruction flag has been set, a stop instruction is executed in step S308, and this routine ends. As a result, the key drive control unit 15 is driven to perform the key release operation of the key 21a.

FIG. 9 is a flowchart of a routine that is started when a key release event occurs.

Here, the description will be made on the assumption that there is new tone generation start information while the key 21a is released.

The key release event is performed by the player or the key drive control unit 15 via the solenoid 23 by the key 21.
This occurs when the key switch 21b of a is turned off.

First, in step S400, the RAM
12 working area, and depressed key 21a
It is determined whether or not the stop instruction flag corresponding to the key number is set. If it is determined that the stop instruction flag has been reset, the key switch 21b of the key 21a has been turned off even though no sound generation stop instruction has been issued from the sequencer. Then, the process proceeds to step S402, where the performer key depression flag is reset, and this routine ends.

On the other hand, if it is determined in step S400 that the stop instruction flag is set, the key 21a is released by the sound generation stop instruction from the sequencer, and as a result, the key switch 21b is turned off. 21a is considered to have been completely released and the process proceeds to step S4.
04, the stop instruction flag is reset, and step S
Proceed to 406.

In step S406, it is determined whether or not the sound generation instruction flag 2 corresponding to the key number has been set. If it is determined that the sounding instruction flag 2 has been reset, this routine is terminated without doing anything. On the other hand, when it is determined that the sound generation instruction flag 2 is set, the process proceeds to step S408. In step S408,
The sounding instruction flag 2 is reset, and the sounding instruction flag 1 is set because there is a new sounding start instruction while the key 21a is being released. Next, the process proceeds to step S410, in which a sound generation instruction is executed, and this routine ends. In this way,
The key release operation of the key 21a is completely executed by the key drive control unit 15, and then the key 21a is released by a new sound generation start instruction.
Is performed.

Each of the routines shown in FIGS. 6 to 9 is controlled by a sound generation start event, a sound generation stop event, a key press event, and a key release event. That is, the determination as to whether or not the key pressing operation and the key releasing operation are completed is detected and controlled by the key switch 21b of the key 21a. Based on the operation completion detection state of the sensor, it is recognized that one key press operation or key release operation of the key has been completed, and the next operation corresponding to the key is controlled.

Here, the mechanical operation characteristics of the key 21a determined by the stroke of the solenoid 23 and the like are measured in advance, and based on the measurement result, the key drive controller 15
May control the next operation of the key 21a in operation. That is, the key drive control means according to the present invention regards a key in operation assuming that a single key press operation or key release operation has ended when a predetermined time has elapsed after the start of the operation, The next operation related to the key may be controlled.
This eliminates the need for scanning for detecting whether each key switch 21b is on or off. The details will be described below. The routine started when the sound generation start event and the sound generation stop event occur is the same as that shown in FIGS.
Here, a routine started when a keyboard press event and a keyboard release event occur will be described.

Assuming that it takes a time ΔT_ON from the start of the key-pressing drive to the completion of the key-depression, and if it takes a time ΔT_OFF from the start of the key-release drive to the completion of the key-release, a note-on (sound-start instruction) sent from the sequencer is assumed. ) Is delayed by a time ΔT_ON, and when the delayed event (referred to as a delayed sound generation execution event) occurs, a routine of FIG. 10 described below is executed, and a note-off (sound generation stop instruction) is performed for a time ΔT_OFF. Just delay,
When the delayed event (called a delayed sounding stop event) occurs, the routine of FIG. 11 described below may be executed.

FIG. 10 is a flowchart of a routine which is started when a keyboard press event and a delayed sound execution event occur.

First, in step S500, it is determined whether or not the tone generation instruction flag 1 corresponding to the key number of the pressed key 21a is set. Pronunciation instruction flag 1
Is determined to have been reset, the process proceeds to step S502, assuming that the key is pressed by the player. Step S
At 502, the player key depression flag corresponding to the key number is set, and this routine ends.

On the other hand, if it is determined in step S500 that the sound generation instruction flag 1 has been set, the key 21a is being operated according to the sound generation start instruction from the sequencer, and it is necessary to wait for a delayed sound generation execution event to be described later. This routine ends.

Here, a sound generation execution event occurs in which the sound generation start instruction sent from the sequencer is delayed by the time ΔT_ON. Then, first, step S50
In step 4, the sound generation instruction flag 1 indicating that the key 21a is operating is reset, and the flow advances to step S506.

In step S506, it is determined whether a stop instruction flag corresponding to the key number has been set. If it is determined that the stop instruction flag has been reset, there is no need to finally release the operating key 21a, so this routine is terminated without any operation. On the other hand, if it is determined that the stop instruction flag is set, a stop instruction is executed in step S508, and this routine ends. As a result, the key drive control unit 15 is driven to perform the key release operation of the key 21a.

FIG. 11 is a flowchart of a routine started when a key release event and a delayed sound generation stop event occur.

Here, the description will be made on the assumption that there is new tone generation start information during the release of the key 21a.

First, in step S600, it is determined whether or not the stop instruction flag corresponding to the key number of the pressed key 21a is set. If it is determined that the stop instruction flag has been reset, the process proceeds to step S602 assuming that the key has been released by the player. Step S60
In step 2, the performer key depression flag corresponding to the key number is reset, and this routine ends. On the other hand, step S600
In, when it is determined that the stop instruction flag is set, the sequencer has already issued a sound generation stop instruction,
This routine ends to wait for a delayed sound generation stop execution event to be described later.

Here, a delay sound generation stop event occurs in which the sound generation stop instruction sent from the sequencer is delayed by the time ΔT_OFF. Then, first, step S6
At 04, the stop instruction flag is reset, and the process proceeds to step S606.

In step S606, it is determined whether or not the sound generation instruction flag 2 corresponding to the key number has been set. If it is determined that the sounding instruction flag 2 has been reset, this routine is terminated without doing anything. On the other hand, if it is determined that the sounding instruction flag 2 is set, the sounding instruction flag 2 is reset in step S608, and the sounding instruction flag 1 is set because there is a new sounding start instruction while the key 21a is released. Is set. next,
Proceeding to step S610, a sound generation instruction is executed, and this routine ends. In this way, the key release operation of the key 21a is completely executed, and then the key depressing operation of the key 21a is performed by a new sound generation start instruction.

In the present embodiment, different times Δ
The delay sounding execution event delayed by T_ON and the time ΔT_OFF and the delay sounding stop event have been described as examples.
A delayed sounding execution event both delayed by the same time,
The routine shown in FIGS. 10 and 11 may be executed by generating a delayed sounding stop event.

[0084]

As described above, according to the present invention,
It is possible to provide an electronic musical instrument that can visually satisfy a listener even when there is sounding start information and sounding stop information in a relatively short time during operation of a key.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a diagram showing a key pressing operation and a key releasing operation of one key having a keyboard shown in FIG. 1;

FIG. 3 is a diagram showing a key pressing operation and a key releasing operation of a key when a sound generation start instruction and a sound generation stop instruction are issued during the key pressing operation of the key;

FIG. 4 shows a key-pressing operation and a key-release operation of a key when there are a plurality of sounding start instructions and a sounding stop instruction during a key-pressing operation of a key and the final instruction is a sounding stop instruction. FIG.

FIG. 5 is a diagram showing a table stored in a working area of a RAM shown in FIG. 1;

FIG. 6 is a flowchart of a routine that is started when a sound generation start event occurs.

FIG. 7 is a flowchart of a routine that occurs when a sound generation stop event occurs.

FIG. 8 is a flowchart of a routine started when a keyboard press event occurs.

FIG. 9 is a flowchart of a routine that is started when a key release event occurs.

FIG. 10 is a flowchart of a routine that is started when a keyboard press event and a delayed sound execution event occur.

FIG. 11 is a flowchart of a routine that is started when a key release event and a delayed sound generation stop event occur.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electronic musical instrument 11 ROM 12 RAM 13 CPU 14 MIDI interface 15 Key drive control part 16 Sound emission control part 17 Speaker 20 Keyboard device 21 Keyboard 21a Key 21b Key switch 22 Key operation detection part 23 Solenoid

Claims (1)

[Claims] A key on which a plurality of vertically operable keys are arranged; a key for operating a corresponding key in response to a key-depression instruction; and a key for releasing the corresponding key in response to a key-release instruction. The key driving means stores a key release instruction when a key release instruction is given to the corresponding key during the key pressing operation in response to the key depression instruction. An electronic musical instrument characterized in that, after the key has been depressed to a predetermined position, the key is driven to shift to a key release operation based on the storage.