JP2692675B2 - 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 capable of generating a melody sound, a percussion instrument sound and a sound effect.

[0002]

2. Description of the Related Art As a performance operator, an electronic musical instrument is known which is provided with a pad in addition to a keyboard and generates a percussion instrument sound in response to the operation of the pad. Also, the type of percussion instrument sound that is produced (for example, hi-hat, single, bass drum,
An electronic musical instrument in which a triangle or the like) can be programmed for each pad is disclosed in, for example, Japanese Patent Application No. 62-3.
32271. Furthermore, some electronic musical instruments of this type can continuously generate a plurality of musical tones at a fixed time interval by operating an operator such as a pad once, and thus, for example, an automatic roll or the like can be performed. Some can be easily generated.

[0003]

By the way, in the prior art, since the generation time interval of a plurality of musical tones continuously generated by one operation of the operator is constant, only a constant continuous musical tone is always generated. It wasn't interesting enough. Moreover, the generated musical tones were monotonous, and it was not desirable to generate musical tones with rich expressiveness.

The present invention has been made in view of the above-mentioned circumstances, and a musical tone is continuously emitted by one operation of the operator.
This continuously generated musical sound that can be produced
It is an object of the present invention to provide an electronic musical instrument capable of automatically changing the respective occurrence time intervals of .

[0005]

According to a first aspect of the present invention, there is provided an electronic musical instrument having a musical performance operator and a musical tone generating means for generating a musical tone signal in response to an operation of the musical performance operator. A plurality of musical tone signals are continuously generated by the musical tone generating means in response to one operation of the child, and the respective generation time intervals of the plurality of musical tone signals are automatically changed. It is characterized in that it is provided with a control means for controlling as described above. The invention described in claim 2 is the power supply according to claim 1.
In the sub-instrument, the control means is one of the performance operators.
Each of the plurality of tone signals generated for each operation
Generate a random number for each tone signal and
It is characterized by controlling each time interval of generation of several musical tone signals.
doing. The invention according to claim 3 is a performance operator and
The tone color of the tone signal generated in response to the operation of the performance operator
In accordance with the designation means to designate and the operation of the performance operator,
Generates a tone signal of the tone color designated by the designation means
An electronic musical instrument having a musical tone generating means, the designated hand
Predetermined values corresponding to each timbre that can be specified by the stage
With respect to the stored storage means and one operation of the performance operator
A plurality of musical sound signals are designated by the designating means.
A tone color that is continuously generated by the tone generating means.
It is generated for each operation of the performance operator.
Generates a random number for each tone signal of the multiple tone signals
However, this random number and a predetermined value corresponding to the specified tone color
Based on and, each generation time of multiple tone signals of the relevant tone color
And a control means for controlling the interval.
I have.

According to the above construction, a plurality of musical tone signals are continuously generated by one operation of the performance operator .
First, since the musical tone signals are automatically generated at different time intervals, it is possible to generate musical tones having fluctuations. Therefore, for example, it is possible to more realistically imitate sounds in the natural world such as thunder and river murmuring.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Such an embodiment represents one aspect of the present invention, does not limit the present invention, and can be arbitrarily modified within the scope of the present invention. In this embodiment, each pad is selectively used to generate one of a factory-set percussion instrument sound, an assigned percussion instrument sound, and an assigned effect sound.

FIG. 1 is a block diagram showing the configuration of an electronic musical instrument according to an embodiment of the present invention. In this figure, 1
The keyboard with multiple keys, 2 is a pad operation unit having a pad PA ₁ ~PA _M, the performance operation portion 3 is composed of these. Reference numeral 4 is a switch section equipped with a program mode switch 4a, a pad mode switch 4b, a hold mode switch 4c and other switch groups. Reference numeral 5 denotes a tone forming unit, which is a tone generator TG1 that forms a tone signal of a melody tone.
And a tone generator TG2 that forms musical tone signals of percussion instrument sounds and sound effects. The musical tone signals output from the musical tone forming unit 5 are synthesized by the synthesizing unit 6,
The synthesized tone signal is supplied to the sound system 7,
A musical tone is generated.

A CPU 8 controls the entire electronic musical instrument.
(Central processing unit), 9 is a ROM (read only memory) in which a control program and various data tables are stored, and 10 is a RAM (random access memory) in which a temporary storage area and various registers and flags are set.
It is. Further, 11 is a timer, which outputs an interrupt signal to the CPU 8 when the set time is measured. The performance operating section 3, the switch section 4, the musical sound forming section 5, the CPU 8, the ROM 9, the RAM 10, and the timer 11 described above.
Are interconnected via bus B.

Next, various registers and flags set in the RAM 10 and various data tables stored in the ROM 9 will be listed and described below. In addition, these RAM
Representative of various registers and flags in 10,
Typical data tables in the ROM 9 are shown in FIGS. 2 and 3, respectively.

<Registers and Flags in RAM 10> Program Mode Flag PGM: The contents are inverted every time the program switch 4a is pressed. The operation mode is switched as follows according to the content of this flag. PGM = "0" ... Normal performance mode. PGM = "1" ... Program mode.

Pad mode flag PMD: The contents are inverted every time the pad mode switch 4b is pressed. The operation mode is switched as follows according to the content of this flag. PMD = "0" If you ...... pad PA ₁ ~PA _M is ON, which will be described later pad sound source table PET (i) (i = 1
~ M), a percussion instrument sound or a sound effect is generated. If the PMD = "1" ...... pad PA ₁ ~PA _M is ON, which will be described later pad assigning table PAST (i)
Percussion instrument sounds or sound effects are generated according to (i = 1 to M).

Hold mode flag HLD: The contents are inverted every time the hold mode switch 4c is pressed. In accordance with the content of this flag, the control of forming percussion instrument sounds and sound effects is switched as follows. HLD = "0" ... Invalidates the upper 2 bits of PEN information (described later). In this case, similarly to the percussion instrument sound, the tone signal is formed such that it attenuates according to a predetermined curve after the attack. HLD = “1” ... The upper 2 bits of PEN information (described later) are valid.

Sound source specification register PEN: PEN (percussion effect number) for specifying the type of sound
An 8-bit register that stores information. The upper 2 bits of the PEN information specify the division of the musical sound to be formed as shown below. Upper 2 bits = 00 ... Percussion instrument sound. (Example) Hi-hat, cymbal, bass drum, triangle High-order 2 bits = 01 ... A sound effect with sustainability. (Example) waves, brake noise, explosions upper 2 bits = 10 ... ... sound effects to repeat attack at predetermined time intervals. (Example) Train sound, church bell, pistol Upper 2 bits = 11 ... Sound effect that repeats attack at random time intervals. (Example) Lightning, chirping of birds, wind, murmuring of rivers The lower 6 bits of PEN information specify the detailed sound type.

◇ Pad ON flag PON (i) (i = 1
~M): flag pad PA ₁ ~PA _M indicates whether the ON state. Flag PON when pad PA _i is ON
(I) becomes "1".

Channel ON flag CHON (j) (j
= 1 to N): Flag indicating whether or not each tone generation channel of the tone generator TG2 is in use. CHON (j) is "1" when the j-th sound generation channel is in use.

Channel table CHPEN (j) (j
= 1 to N): A table showing the types of sound sources being sounded in each sound generation channel of the tone generator TG2. The above-mentioned PEN information is stored in this table.

◇ Pad assignment table PAST (i)
(I = _{1 to M} ): A table showing the types of sound sources corresponding to the pads PA _{1 to} P AM. The PEN information described above is written in this table.

Wait time table WTD for each channel
(J) (j = 1 to N): A table that stores the waiting time from one attack to the next when a sound effect that repeats an attack is generated for each sounding channel. When a sound effect that repeats the attack is sounded in the j-th sound generation channel of the tone generator TG2, the waiting time is stored in WTD (j).

<Table in ROM 9> ◇ Sound source type table KPC (k) (k = 1 to NK): In this electronic musical instrument, a percussion instrument sound or a sound effect is assigned to each key of the keyboard 1. This table stores PEN information indicating the type of sound assigned to each key.

◇ Pad sound source table: PET (i) (i
= 1 to M): This table is PEN information specifying the type of percussion instrument sounds or sound effects, pads PA ₁ ~PA _M
It is factory set corresponding to.

Wait time table WT (n) (n = 1 to
NP): In this table, information designating the interval at which the attack portion of the sound effect is generated is stored in correspondence with the PEN information.

Scaling table WTSP (n)
(N = 1 to NP): This table stores scaling parameters corresponding to each element of the waiting time table WT (n). When a sound effect with a random attack interval is generated, a random number is generated, this is multiplied by a scaling parameter, and the waiting time table WT
The waiting time until the next attack is calculated by adding the contents of (n).

The operation of this electronic musical instrument will be described below. The CPU 8 of this electronic musical instrument executes the main routine whose general flow is shown in FIG. As shown in this figure, when the power of this electronic musical instrument is turned on, the CPU 8 executes an initialization process (step S1), which causes RA
The registers and flags in M10 are cleared. Then, the CPU 8 thereafter performs key processing (step S2), pad processing (step S3), and switch processing (step S).
Repeat 4).

If the keyboard 1 is operated and a key-ON event is detected, the key-ON processing routine of FIG. 5 is started in the keyboard processing of step S2. Also, key O
When the FF event is detected, the key OFF processing routine of FIG. 6 is started. Also, if the pad PA ₁ ~PA _M is operated, in step S3, the pad OFF processing routine of the pad ON process routine or 8 of FIG. 7 is started. When each switch of the switch unit 4 is pressed, in step S4, a processing routine corresponding to each switch is activated and executed as described below.

[Processing for Switch Operation] When the program mode switch 4a is pressed, the program mode switch processing routine of FIG. 9 is started. First, in step S11, the CPU 8 inverts the contents of the program mode flag PGM in the RAM 10. Next, when proceeding to step S12, the CPU 8 causes the tone generator TG1.
The key OFF signal is output to all the sound generation channels of. As a result, the melody sound is stopped.

Next, in step S13, the CPU 8
Outputs a sound OFF signal to all tone generation channels of the tone generator TG2. As a result, the percussion instrument sound and the sound effect are stopped. Then, the processing in this routine ends, and the process returns to the main routine (FIG. 4) of the starting source.

On the other hand, when the pad mode switch 4b is pressed, the pad mode switch processing routine of FIG. 10 is started. First, in step S21, the contents of the pad mode flag PMD in the RAM 10 are inverted. Next, in step S22, the hold mode flag HLD
It is determined whether or not the content of is "0". If the determination result is “YES”, the process returns to the main routine, and if the determination result is “NO”, the process proceeds to step S23 to send a sound OFF signal to the tone generator TG2 to stop the musical sound, Return to the routine.

Here, when the hold mode flag HLD is "0", the sound effect is also attenuated according to a predetermined attenuation curve like the percussion instrument sound (this operation will be described later), so a sound OFF signal is sent. No need. Therefore, this routine executes step S23 only when the hold mode flag HLD is "1".

When the hold mode switch 4c is pressed, the hold mode switch processing routine shown in FIG. 11 is started. First, in step S31, the contents of the hold mode flag HLD are inverted. Next in step S32
When the process goes to, the sound OFF signal is sent to all tone generation channels of the tone generator TG2 to stop the musical sound. Next, when proceeding to step S33, the tone generator TG2
Waiting time table WTD for all pronunciation channels
(J) Write data “0” in (j = 1 to N). Next, proceeding to step S34, the tone generator TG2
Channel table CHON corresponding to all pronunciation channels
(J) Write data “0” in (j = 1 to N). Then, the process returns to the main routine.

As described above, the flags PGM, PMD, and HLD are switched according to the operation of the switch section 4, and the operation mode of this electronic musical instrument is switched accordingly. Hereinafter, the operation of the program mode and the normal performance mode assigning a pad PA ₁ ~PA _M to a desired percussion sounds and sound effects.

[Program Mode] As described above, the player presses the program mode switch 4a and sets the program mode flag PGM to "1", whereby the operation mode of the CPU 8 becomes the program mode.
In this mode, when the player presses a key on the keyboard 1, the key ON processing routine of FIG. 5 is started in step S2 of the main routine of FIG.

First, the CPU 8 turns the key O on the keyboard 1.
The key code of the key in which the N event has occurred is stored in the key code buffer KCD (step S101). Next, in step S102, the key ON flag KON is set to "1". Next, when proceeding to step S103,
It is determined whether the program mode flag PGM is "1". In this case, the determination result is “YES”, and the process proceeds to step S104.

After proceeding to step S104, the CPU 8
Sound source type table KPC (k) in ROM 9 (k = 1 to 1
Key code KC in the PEN information stored in (NK)
The data KPC (KCD) corresponding to D is read and RA
It is stored in the sound source designation register PEN in M10. Next, proceeding to step S105, the PE sounding routine of FIG. 12 is started, and as a result, the percussion instrument sound or sound effect corresponding to the PEN information in the register PEN is generated by the tone generator TG2.

The detailed contents of the PE sounding routine will be described later when the "normal performance mode" is described. Next, proceeding to step S106, it is determined whether or not any of the pad ON flags PON (i) (i = 1 to M) is "1" and the pad mode flag PMD is "1", If the determination result is "NO", the process returns to the main routine. On the other hand, at this point, a pad PA _i
When the pad ON event of is detected, the pad ON flag PON (i) is “1”.

In this state, and if the pad mode flag PMD is set to "1",
The determination result of step S106 is "YES", and the process proceeds to step S107. When the process proceeds to step S107, the CP
U8 obtains the pad number i for which the pad mode flag PON (i) is "1", and the storage area PAST (i) in the pad assignment table corresponding to this number i.
Write the PEN information to. Then, the process returns to the main routine.

Next, in this program mode, when a key-OFF event of the keyboard 1 is detected, the key-OFF processing routine of FIG. 6 is started via step S2 of the main routine. First, go to step S201,
The key code of the key having the key OFF event is fetched in the buffer BUF. Next, the process proceeds to step S202,
It is determined whether the program mode flag PGM is "1".

In this case, the judgment result is "YES",
In step S203, it is determined whether there is any other key-on key at this time. And the judgment result is "N
In the case of "O", the process proceeds to step S204, the key ON flag KON is cleared, and the process returns to the main routine. On the other hand, if the determination result is "YES", the flow proceeds to step S205, and the key that has been turned on the latest until the present time is searched to obtain the key code KCD of the key.

In this case, the key ON flag KON is not cleared. That is, as long as one of the keys is ON, the key ON flag KON holds "1", and the key code corresponding to the key that is turned ON latest among the keys currently being pressed is held in KCD. It In this case,
It will be assigned to a pad by a pad ON event described later. Then, when the processing of this routine ends, the process returns to the main routine.

On the other hand, in this program mode, if any of the pads PA _{1 to} PA _M is turned on, the pad of FIG. 7 is turned on in step S3 of the main routine.
A processing routine is started. First, in step S301, the CPU 8 obtains the number i of the pad PA _{i in} the ON state.

Next, in step S302, the pad ON flag PON (i) corresponding to the pad number i is set to "1". Next, in step S303, it is determined whether or not the program mode flag PGM is "1". In this case, the determination result is "YES" and the process proceeds to step S304. When the process proceeds to step S304, key O
It is determined whether the N flag KON is "1". Then, if the determination result is "YES", that is, if the key ON of the keyboard 1 is detected at this time, step S
Proceed to 305.

At step S305, the key code K
Referring to the contents of the CD, the sound source type table KP in the ROM 9
Of the PEN information stored in C (k) (k = 1 to NK), the data KPC (KC (KC) corresponding to the key code KCD
Store D) in register PEN. Next, step S3
Go to 06, pad assignment table PAST (i)
Of (i = 1 to M), the PEN information in the register PEN is written in the storage area PAST (i) corresponding to the pad in which the pad ON event is detected. Then, the process returns to the main routine.

On the other hand, if the key ON flag KON is "0", there is no key to be assigned, so step S
The determination result of 303 is "NO", and the processing of step S307 and subsequent steps of this routine is performed. As a result, percussion instrument sound or sound effect is generated in the tone generator TG2. Then, the process returns to the main routine. In addition,
The processing from step S307 onward will be described in the "normal performance mode", and therefore the description thereof is omitted here to avoid duplication.

Next, when a pad OFF event is detected in the program mode, the pad OFF processing routine of FIG. 8 is started. In this routine, the number i of the pad that has been turned off is detected (step S401), and then the pad on flag (i) is cleared. Therefore, the pad PA _i is turned ON (pad ON processing routine is started).
The pad ON flag PON (i) holds "1" from the time it is turned off (the pad OFF routine is activated).

[0045] In this manner, the program mode, the key ON event is detected in the keyboard 1, when one of the pad ON event of the pad PA ₁ ~PA _M is detected, corresponding to the pads which are ON PEN information (read from the KPC table) corresponding to the turned-on key in the pad assignment table PASS (i)
Is assigned. Also, this pad assignment table P
The key is ON for the process of writing PEN information to AST (i).
It is included in both the processing routine and the pad ON processing routine. Therefore, no matter which routine is activated first, PE in the pad assignment table PAST (i) is
Allocation of N information is normally performed.

[Normal Play Mode] When the program mode switch 4a is pressed to set the program mode flag PGM to "0", the operation mode becomes the normal play mode. Hereinafter, Oite in this mode, the operation of CPU8 when the case key operation is performed and the pad operation is performed.

<Operation When Keyboard is Operated> When the keyboard 1 is operated and a key ON event is detected, the key ON processing routine of FIG. 5 is started in step S2 of the main routine. In this case, the key code KCD of the key having the key ON event is fetched in step S101, and "1" is set in the key ON flag KON in step S102. Then, step S10
The determination result of 3 is "NO", and the process proceeds to step S108.

In step S108, the number j of the vacant tone generation channel in the tone generator TG1 is obtained. Next, in step S109, the key code K is assigned to the jth tone generation channel of the tone generator TG1.
Sends a CD and key ON signal. As a result, the tone generator TG1 generates a melody sound corresponding to the key code KCD. Then, the process returns to the main routine.

On the other hand, when the key-OFF event of the keyboard 1 is detected, the process shown in FIG.
The key off processing routine is started. First, in step S201, the key code of the key having the key OFF event is fetched into the buffer BUF. Then, the decision result in the step S202 becomes "NO", and the flow advances to a step S206 to generate a musical tone which matches the key code in the buffer BUF among the sounding channels currently sounding in the tone generator TG1. Search for things.

Next, in step S207, it is determined whether or not there is a corresponding tone generation channel. If "NO", the process returns to the main routine. On the other hand, if “YES”,
That is, if there is a tone generation channel that is generating a tone matching the key code of the buffer BUF, a key OFF signal is sent to that tone generation channel (step S20).
8). As a result, in the tone generator TG1, the melody sound corresponding to the key that has been turned off is stopped.

[0051] <Operation in the case where a pad operation> pads PA ₁ ~PA _M is operated, the pad ON event is detected, in step S3 of the main routine, FIG. 7
The pad ON processing routine is started. In this case, the number i of the pad having the pad ON event is obtained in step S301, and the pad ON flag PON (i) is set in step S302.

The pad ON flag PON (i)
Holds "1" until the pad PA _i is turned OFF and the pad OFF processing routine (FIG. 8) is activated. Then, the determination result of step S303 becomes "NO", the flow proceeds to step S307, and the pad mode flag P
It is determined whether MD is "1". Then, if the determination result is “YES”, the process proceeds to step S308 and “NO”.
In the case of, it progresses to step S309.

Next, in step S308, the pad address
The number in the signature table PAST (i) (i = 1 to M)
The data PAST (i) corresponding to the number i in the register PEN
, And the process proceeds to step S310. Meanwhile, step
Proceeding to S309, pad sound source table PET (i)
Data corresponding to the number i in (i = 1 to M)PET
(I) is written in the register PEN, and step S310
Proceed to. Then, in step S310, the PE of FIG.
The pronunciation routine is activated.

The processing flow of the PE sounding routine will be described below. First, in step S501, it is determined whether the upper 2 bits of the PEN information are "00". If the determination result is "YES", that is, if the musical tone to be generated is a percussion instrument sound, the process proceeds to step S502.

In step S502, the tone generation channel number j in the tone generator TG2 is determined and the channel ON flag CHON (j) is set. Next, proceeding to step S503, the tone generator data and the sound ON signal corresponding to the PEN information are sent to the j-th sound generation channel of the tone generator TG2. As a result, a percussion instrument sound corresponding to the PEN information is generated. Next, in Step S504, the channel is turned on.
The flag CHON (j) is cleared, and the activation source is restored.

Next, the upper 2 bits of the PEN information are "0".
In the case of 1 ", that is, in the case where the musical sound to be generated is a sound effect waiting for sustainability, the judgment result in step S501 becomes" NO ", and then the judgment result in step S505 becomes" YES ", and the step Proceed to S506. Then, it is determined whether or not the hold mode flag HLD is "1". Then, if the determination result is “NO”, the flow proceeds to step S507, the second decay rate of the envelope corresponding to the PEN information is obtained, and the second decay rate is obtained in the buffer 2
Take in DR.

Next, in step S508, the tone generation channel number j in the tone generator TG2 that is vacant.
And the channel ON flag CHON (j)
Is set. Next, in step S509, the PEN is set to the j-th sound generation channel of the tone generator TG2.
The sound source data corresponding to the information, the storage information of the buffer 2DR and the sound ON signal are transmitted. As a result, PEN
A sound effect corresponding to the information is generated.

In this case, as shown in FIG. 13, the envelope of the generated sound effect rises at a predetermined attack rate AR, then falls at the first decay rate 1DR, and thereafter, the second decay rate indicated by the buffer 2DR. ,
That is, it is attenuated at the second decay rate corresponding to the PEN information. Therefore, the sound effect generated by the ton generator radar TG2 is a sound effect that is not persistent as in the case of a percussion instrument. Next, the process proceeds to step S510, clears the channel ON flag CHON (j), and returns to the activation source.

On the other hand, when the hold flag HLD is "1", the determination result of step S506 is "YE."
S ”and the process proceeds to step S511. Then, the data “0” is stored in the buffer 2DR. Then step S
Proceeding to 512, the channel table CHPEN (j) (j
= 1 to N), it is determined whether or not one that matches the PEN information is included. And the judgment result is "YES"
In the case of, the flow advances to step S513 to fetch the number j of the corresponding sound generation channel, and then the flow advances to step S514 to send a sound OFF signal to the jth sound generation channel of the tone generator TG2 to mute the musical sound and then turn the channel ON. The flag CHON (j) is cleared (step S510).

This corresponds to the process of muting the persistent sound effect generated by the first pad ON event by the second pad ON event. It should be noted that the process of generating a persistent sound effect by the first pad ON event will be described later. When step S510 ends, the process returns to the activation source.

On the other hand, the determination result of step S512 is "N
O ”, that is, the channel table CHPEN
If (j) (j = 1 to N) does not include one that matches the PEN information, the above-described step S508 to.
S510 is executed, a sound effect is generated, and the process returns to the starting source.

However, in this case, since the content of the buffer 2DR is "0", the tone generator TG2
As shown in FIG. 13, the envelope of the sound effect generated in (2) has sustainability in the second decay portion. This corresponds to the process of generating a persistent sound effect by the above-described first pad ON event.

Next, the upper 2 bits of the PEN information are "1".
If it is 0 ”or“ 11 ”, step S501.
And through S505, the process proceeds to step S515. Then, it is determined whether or not the hold mode flag HLD is "1", and if the determination result is "NO", the flow proceeds to step S516. When the operation proceeds to step S516, the tone generator T
The number j of the vacant tone generation channel in G2 is obtained.

Next, in step S517, the sound source data and the sound ON signal corresponding to the PEN information are sent to the j-th sound generation channel of the tone generation radar TG2. As a result, a percussion instrument sound corresponding to the PEN information is generated. Further, the PEN information is stored in the storage area CHPEN (j) corresponding to the number j in the channel table. Next, proceeding to step S518, the WTD (j) setting routine of FIG. 14 is activated.

Upon proceeding to step S601 of this routine, the CPU 8 determines the storage area CHPE of the channel table.
The PEN information stored in N (j) is read and the ROM 9
The waiting time information WT (PEN) corresponding to the PEN information is read from the waiting time table WT (n) (n = 1 to N) in the table and stored in the buffer WBUF.

Next, in step S602, it is determined whether the second bit of the PEN information is "1". If the determination result is “NO”, that is, if the upper 2 bits of the PEN information is “10”, the process proceeds to step S603.
The waiting time information in the buffer WBUF is stored in the storage area WTD of the waiting time table corresponding to the j-th sound generation channel.
Write to (j). Then, the process returns to the starting source of this routine (PE sounding routine in this case).

On the other hand, the determination result of step S602 is "Y.
In the case of "ES", that is, when the upper 2 bits of the PEN information are "11", the process proceeds to step S604 and a random number is generated and stored in the buffer RDM. And step S
Proceeding to step 605, the waiting time is obtained from the waiting time information WT (PEN) corresponding to the PEN information from the ROM 9 and the scaling parameter WTSP (PEN) and the random number RDM according to the following formula (1), and the sounding channel of the waiting time table is obtained. Write to the storage area WTD (j) corresponding to j.

WTD (j) ← WT (PEN) + RDM * WTSP (PEN) (1) Then, the process returns to the activation source (PE sounding routine in this case). Then, the process proceeds to step S519 of the PE sounding routine, the channel ON flag CHON (j) is set,
It returns to the pad ON processing routine which is the starting source.

On the other hand, step S51 of the PE sounding routine.
If the determination result of 5 is "YES", that is, if the hold mode flag HLD is "1", step S52.
0, the channel table CHPEN (j) (j = 1
~ N), it is determined whether or not there is a match with the PEN information. Then, if the determination result is "NO", the above-described steps S516 to S519 are executed to return to the pad ON processing routine. Also, step S5
When the determination result of 20 is "YES", the channel ON flag CHON (j) of the corresponding channel is cleared.

In this electronic musical instrument, the timer 11 outputs an interrupt signal to the CPU 8 at regular time intervals.
As a result, the CPU 8 interrupts the processing currently being executed and activates the timer interrupt routine shown in FIG. First,
When the process proceeds to step S701, the hold mode flag HL
It is determined whether D is "1". And the judgment result is "N
In the case of "O", this routine is exited and the interrupted processing is restarted.

On the other hand, if the decision result in the step S701 is "YES", the process advances to a step S702, where the variable j
Is initially set to 1. Next, in step S703,
It is determined whether the channel ON flag CHON (j) is "1". Here, the channel ON flag CHON
The state of (j) = 1 indicates that the sound effect that repeats the attack is assigned to the channel.

If the result of the determination is "NO", the flow proceeds to step S708, and if "YES", the flow proceeds to step S704. Next, proceeding to step S704, the content WTD (j) of the waiting time table corresponding to the j-th sound generation channel of the tone generator TG2 is decremented. Then, the process proceeds to step S705, and it is determined whether or not the content WTD (j) of the table has become “0”. If the determination result is “NO”, step S7
08, and if “YES”, proceed to step S706.

Next, in step S706, a sound ON signal is sent to the j-th sound generation channel of the tone generator. As a result, the sound effect that is sounding in the sounding channel (number j) is attacked again. Next, proceeding to step S707, the above-mentioned WTD (j) setting routine is activated, whereby the waiting time until the next attack in the sounding channel (number j) is calculated, and the contents WTD ( j) is updated.

Here, the contents WTD of the waiting time table
(J), as can be seen from the above description, the PEN information corresponding to the sounding channel (number j), that is, the second bit of the content CHPEN (j) of the channel table is "0".
In the case of, the value is always a constant value corresponding to the PEN information. On the other hand, when the second bit is "1", the value is in accordance with the random number generated at that time. Next, in step S708, the variable j is incremented. Then, step S709
It is determined whether or not the variable j exceeds the maximum value N of the tone generation channel number. If "NO", the process returns to step S703, and if "YES", the timer interrupt routine is terminated and the interrupted process is restarted. To do.

As described above, the hold mode flag H
When LD is "1", the pad to which the PEN information whose upper 2 bits are "10" or "11" is assigned (this pad is, for example, pad A) is turned ON, and the pad of the PEN information is turned ON. If the event is the first time, the step S5 is performed in the PE sounding routine of FIG.
16 to S519 are executed, the PEN information is registered in the assigned sounding channel (jth), and the channel ON flag CHON (j) is set.

Then, in this way, the channel ON flag C
When HON (j) is set, thereafter, in the sound generation channel (number j), the re-attack of the sound effect is repeated every time the timer interrupt processing routine is activated and the waiting time WTD (j) becomes “0”. Be done. In this state, it is assumed that the pad A is turned on again. In this case, P
The determination result of step S520 of the E sounding routine is “YE
S ”, and the process proceeds to step S521.

Then, the number j of the sounding channel which is generating the sound effect of the PEN information corresponding to the pad A is obtained (step S521), the channel ON flag CHON (j) is cleared (step S522), and the pad ON processing routine is performed. Return to. As a result, thereafter, the sound effect corresponding to the pad A is stopped in the sound generation channel (number j). As described above, when the upper 2 bits of the PEN information of the turned-on pad is "10" or "11" and the hold mode flag HLD is "1", the first turning-on of the pad causes A sound effect that repeats the attack is generated in the tone generator, and the sound effect is stopped when the pad is turned on again.

[0078]

As described above, according to the present invention , a plurality of musical tone signals can be produced by one operation of the performance operator.
Is continuously generated, and each tone signal is automatically generated.
Since the time intervals are generated differently , a plurality of musical tone signals can be continuously generated at different time intervals by one operation of the performance operator, whereby, for example, thunder, river murmuring, etc. It is possible to generate musical sounds with fluctuations in the natural world.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram for explaining a register and flag configuration in a RAM 10 in the electronic musical instrument.

FIG. 3 is an explanatory diagram for explaining a table configuration in a ROM 9 in the electronic musical instrument.

FIG. 4 is a flowchart showing a processing procedure of a main routine in the electronic musical instrument.

FIG. 5 is a flowchart showing a processing procedure of a key-ON processing routine in the electronic musical instrument.

FIG. 6 is a flowchart showing a processing procedure of a key OFF processing routine in the electronic musical instrument.

FIG. 7 is a flowchart showing a processing procedure of a pad ON processing routine in the electronic musical instrument.

FIG. 8 is a flowchart showing a processing procedure of a pad OFF processing routine in the electronic musical instrument.

FIG. 9 is a flowchart showing a processing procedure of a program mode switch processing routine in the electronic musical instrument.

FIG. 10 is a flowchart showing a processing procedure of a pad mode switch processing routine in the electronic musical instrument.

FIG. 11 is a flowchart showing a processing procedure of a hold mode switch processing routine in the electronic musical instrument.

FIG. 12 is a flowchart showing a processing procedure of a PE sounding routine in the electronic musical instrument.

FIG. 13 is a diagram showing an envelope waveform in the electronic musical instrument.

FIG. 14 is a flowchart showing a processing procedure of a WTD (j) setting routine in the electronic musical instrument.

FIG. 15 is a flowchart showing a processing procedure of a timer interrupt routine in the electronic musical instrument.

[Explanation of symbols]

1 ...... keyboard, 2 ...... pad operation unit, PA ₁ ~PA _M ...... pad, 3 ...... performance operation unit, 4 ...... switch unit, 5 ...... tone formation portion, 8 ...... CPU, 9 ...... ROM 10 ... RA
M, 11 ... Timer.

Claims (3)

(57) [Claims] 1. An electronic musical instrument comprising a musical performance operator and a musical sound generating means for generating a musical sound signal in response to an operation of the musical performance operator, wherein a plurality of musical tone signals are produced for one operation of the musical performance operator. Which is continuously generated by the musical sound generating means,
Electronic musical instrument characterized by comprising a control means for controlling so as to vary each time interval of generation of the plurality of musical tone signals automatically. 2. The control means comprises: The duplication generated by one operation of the performance operator.
Number of tone signals, a random number is generated for each tone signal.
Based on the number, the time intervals at which the plurality of tone signals are generated are controlled.
Control The electronic musical instrument according to claim 1, wherein: 3. A performance operator and operation of the performance operator
Specifying means for specifying the tone color of the musical tone signal generated according to
Designated by the designating means according to the operation of the performance operator
Tone generating means for generating a tone signal of a specified tone color
An electronic musical instrument that Predetermined corresponding to each timbre that can be designated by the designation means
Storage means for storing values in advance, A plurality of musical tone signals for one operation of the performance operator
With the tone color designated by the designating means,
The performance is continuously generated, and the performance is
The plurality of musical sounds generated for one operation of the operator
A random number is generated for each tone signal of the signal, and this random number
Based on the specified value corresponding to the specified tone,
Control for controlling each time interval of generation of multiple tone signals of a tone color
Means An electronic musical instrument comprising: