JP3392451B2 - Electronic musical instrument tone control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical tone control device for an electronic musical instrument, and more particularly to a musical tone control device for an electronic musical instrument which is capable of simultaneously producing a plurality of musical tones by a plurality of musical tone producing means.

[0002]

2. Description of the Related Art Conventionally, in the field of electronic musical instruments, the effects obtained by various playing methods of acoustic musical instruments have been simulated, and the simulation of these various playing methods is performed by the pitch (pitch) of a musical sound to be produced. It is realized by appropriately controlling various musical tone control parameters such as tone color and volume.

For example, the pitch of a musical tone is smoothly changed over time from a pitch corresponding to a previous key depression operation to a pitch corresponding to a new key depression operation.
It is widely known that there is an electronic musical instrument having a keyboard part that can simulate an effect obtained by a so-called portamento playing method (hereinafter referred to as a portamento effect).

Further, a plurality of musical tone generating means for generating musical tones are provided, and one of the plurality of musical tone generating means is selected from among the plurality of musical tone generating means in response to a sound generation start instruction by a new key depression operation. An electronic musical instrument capable of simultaneously generating a plurality of musical tones has been realized by selecting and assigning a tone generation start instruction by a new key depression operation to the selected musical tone generating means.

[0005]

By the way, in the case of simulating the above-mentioned portamento effect, if only a single musical tone is generated at the same time, a new push is made based on the pitch of the musical tone being generated. Since the pitch of the musical tone needs to be smoothly changed with the passage of time to the pitch corresponding to the key operation, there is no problem of giving an unnatural feeling to the audience in terms of musical expression.

However, when simulating the portamento effect in an electronic musical instrument capable of simultaneously producing a plurality of musical tones by the plurality of musical tone producing means described above, the following problems have been pointed out.

That is, in an electronic musical instrument capable of simultaneously producing a plurality of musical tones by a plurality of musical tone producing means, the tone pitch at the start of tone generation corresponding to a new key depression operation, that is, the tone pitch at the beginning of the portamento effect is , The current pitch of the musical tone generating means assigned for generating a musical tone corresponding to a new key depression operation.

However, when a musical tone corresponding to a new key pressing operation is generated, which musical tone generating means is to be assigned to generate a musical tone corresponding to a new key pressing operation is performed by using an assigner to perform history assignment (time For example, select the musical tone generation method that started generating the musical tone that is the oldest.
This is a method of selecting a tone generation means based on a history relating to tone generation. ) Or level assignment (a method of comparing the levels of the musical tones generated by the musical tone generating means and selecting the musical tone generating means that is generating the musical tone of the lowest level). Therefore, if the musical tone generating means assigned for generating a musical tone corresponding to a new key pressing operation is the same as the musical tone generating means assigned for generating a musical tone corresponding to the immediately preceding key pressing operation. Was not always.

Therefore, the pitch at the start of the portamento effect is not particularly related to the pitch of the musical tone generated by the key pressing operation immediately before, so that the pitch at the start of the portamento effect is not musical. It has been pointed out that there is a risk that it may become natural and that the natural portamento effect cannot be obtained.

The present invention has been made in view of the above problems of the prior art, and its object is to generate a plurality of musical tones simultaneously by a plurality of musical tone generating means. Also, it is an object of the present invention to provide a musical tone control device for an electronic musical instrument in which a musical tone control parameter is controlled by associating it with a parameter value based on an immediately preceding pronunciation start instruction so as not to give an unnatural musical feeling. To do.

That is, a musical tone control parameter such as the pitch in the portamento effect is designated by a parameter value designated by the immediately preceding sounding start instruction (a target parameter value by the immediately preceding sounding start instruction) or by the immediately preceding sounding start instruction. The current parameter value in the process of changing to the specified parameter value (the parameter value in the process of changing to the target parameter value due to the immediately preceding sounding start instruction) is used as a reference to control the musical unnatural feeling. I tried not to give.

[0012]

In order to achieve the above object, the invention according to claim 1 of the present invention is provided with a plurality of musical sound generating means capable of respectively generating musical sounds, and responds to a sounding start instruction. Then, any one of the plurality of musical tone generating means is selected, and the musical tone generating means corresponding to the sound generation start instruction causes the musical tone of the electronic musical instrument to generate a musical tone based on the parameter value of the musical tone control parameter. In the control device, the first storage means for storing the current parameter value read out for the tone generation of each of the plurality of tone generation means, and the target parameter of the tone generated by each of the plurality of tone generation means. In response to a second storage means for storing a value and a new sounding start instruction, a musical tone corresponding to the sounding start instruction immediately before the new sounding start instruction is generated from the first storage means. Reading the current parameter values of the musical tone to be generated by stages, the read parameter values,
Corresponding to the first pronunciation control instruction stored in the first storage means as the current parameter value of the musical sound generated by the musical tone generation means corresponding to the new pronunciation start instruction, and the new pronunciation start instruction. And storing the parameter value of the musical tone based on the new pronunciation start instruction in the second storage means as the target parameter value of the musical tone generated by the musical tone generation means corresponding to the new pronunciation start instruction. The second memory control means and the parameter values corresponding to the respective tone generating means stored in the first storing means are changed to the parameter values corresponding to the respective tone generating means stored in the second storing means by the time. It has an interpolating means for gradually approaching with progress.

In the invention according to claim 2 of the present invention, the musical tone control parameter is a parameter for controlling the pitch of a musical tone.

[0014]

According to the invention described in claim 1 of the present invention,
In response to a new sounding start instruction by the first memory control means, the musical sound generated by the musical sound generating means corresponding to the sounding start instruction immediately before the new sounding start instruction is stored in the first memory means. The current parameter value is read, and the read parameter value is stored in the first storage means as the current parameter value of the musical sound generated by the musical sound generating means corresponding to the new sounding start instruction. .

The second memory control means sets the parameter value of the musical tone based on the new sounding start instruction as the target parameter value of the musical tone generated by the musical sound generating means corresponding to the new sounding start instruction. , Stored in the second storage means.

Further, the parameter value corresponding to each musical tone generating means stored in the first storage means is changed to the parameter value corresponding to each musical tone generating means stored in the second storage means by the interpolating means. It can be gradually approached as time passes.

Therefore, the tone generation of the musical tone based on the new tone generation instruction is generated by the tone generation unit corresponding to the tone generation instruction immediately before the new tone generation instruction stored in the first storage unit. Starting from the current parameter value of, and gradually approaching the target parameter value of the musical sound generated by the musical sound generating means corresponding to the new sound generation start instruction stored in the second storage means.

[0018]

[0019]

[0020]

According to the second aspect of the present invention, the pitch of the musical tone generated based on the new pronunciation start instruction is stored in the first storage means. A tone generation corresponding to the new sounding start instruction which is started by the current parameter value of the tone generated by the tone generating means corresponding to the sounding start instruction immediately before the start instruction and is gradually stored in the second storage means. The target parameter value of the musical sound generated by the means is brought closer to the target parameter value.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A musical tone control apparatus for an electronic musical instrument according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of an electronic musical instrument having a musical tone control device for an electronic musical instrument according to an embodiment of the present invention.

The electronic musical instrument is constructed so that its entire operation is controlled by using a central processing unit (CPU) 10. The CPU 10 includes a timer 12 for issuing a timer interrupt at a time interval of 10 msec in order to perform a timer interrupt process to be described later, and a keyboard section 14 for a performer to perform a key press / release operation. Are connected.

Further, the CPU 10 is connected to the CPU 10 via a bus.
A read only memory (ROM) 16 in which a predetermined program for the whole operation is stored, and a C described later.
A random access memory (RAM) 18 as a working area in which various buffers and registers necessary for the execution of programs by the PU 10 are set, and C
The tone generator 20 is connected to the tone generator 20 that generates / stops the tone signal corresponding to the key depression / key release of the keyboard 14 under the control of the PU 10.

Further, the musical sound generating section 20 has a digital / digital
A sound emitting unit 22 including an analog (D / A) converter and an amplifier is connected to the sound emitting unit 22.
The speaker 24 is connected. In this way, the musical sound signal output from the musical sound generating unit 20 is emitted to the space as a musical sound through the sound emitting unit 22 and the speaker 24.

The above-mentioned tone generation section 20 generates a tone signal corresponding to a tone control parameter (pitch, tone color, volume, etc.) for controlling the characteristics of the tone, and has 24 tone generation channels (voices). It is set and can generate 24 musical tones at the same time.

Also, a portamento mode changeover switch 26 is connected to the CPU 10 as an operator for switching the portamento mode in order to select the type of portamento effect provided by the musical tone control device of the electronic musical instrument. Has been done. Portamento mode changeover switch 26 is "ground" side and "+ 5V"
It is configured to be switched to the side.

When the portamento mode selector switch 26 is switched to the "ground" side,
The pitch that should be reached by the voice selected corresponding to the key press immediately before on the keyboard section 14 (the pitch corresponding to the pitch of the key number specified by the key press on the keyboard section 14) "Mode: 0" is selected as the starting pitch.

When the portamento mode selector switch 26 is switched to the "+ 5V" side, the current pitch (current pitch) of the voice selected in response to the key pressing just before the keyboard section 14 is changed to “Mode: 1” is selected as the start pitch of this key depression.

In the RAM 18, the CPU 10 is in the ROM 16
The buffers and registers required for executing the program stored in are set. Some of the buffers and registers related to the implementation of the present invention are shown below. In the following description, the contents (data, etc.) of each buffer and register are unless otherwise specified.
They shall be represented by the same label name.

(1) LAST_VOICE Voice number of the voice selected by pressing the key immediately before the new key pressing (24 voices are set in this embodiment, so the voice numbers are "1" to "24"). Is stored in the buffer and is initialized to “0” when the power is turned on. In the present embodiment, description of the selection of whether to switch the tone color or to add portamento is omitted, but it is also performed when the tone color is switched and when the portamento is switched. , “LAST_VOICE = 0”.

(2) CUR_P This is a buffer for storing the current pitch (current pitch) of each voice, and the same number as the voices, that is, 24 is set.

(3) DEST_P This is a buffer for storing the pitch that each voice should reach (the pitch corresponding to the pitch of the key number designated by the key depression of the keyboard section 14), the same number as the voices, that is, 24 are set.

(4) RATE This is a buffer for storing the amount of change in pitch in one interrupt process, which will be described later, for each voice, and is set to the same number as the voices, that is, 24 voices.

(5) TIME Portamento time arbitrarily set by the performer by an operator (not shown) (time required for smooth pitch change from start portamento pitch to arrival pitch)
Is a buffer for storing.

(6) SW This is a flag indicating the portamento mode set by operating the portamento mode changeover switch 26. Portamento mode switch 26
"Mode: 0" when switched to the "ground" side
Is set to "0", and when switched to the "+ 5V" side, "mode: 1" is set and "1" is set.

(7) V This register stores the voice number of the voice selected by key depression.

(8) V'A register for storing the voice number of the voice selected by pressing the key immediately before.

(9) SV The voice that is being processed in the timer interrupt processing described later.
This is a register that stores a number and is used only in timer interrupt processing.

The operation of the musical tone control apparatus for an electronic musical instrument according to the present invention will be described with reference to the flowcharts shown in FIGS. 2 and 3 and the operation example shown in FIG.

When the musical tone control device for an electronic musical instrument detects a key depression / key release operation of the keyboard section 14, an interrupt process corresponding to the detection is executed as described below. Further, the CPU 10 is interrupted at time intervals of 10 msec, and the timer interrupt process is executed. Then, when the execution of such interrupt processing is completed, it enters an interrupt waiting state.

When a key depression operation is performed on the keyboard section 14, the keyboard section 14 interrupts the CPU 10, and a key depression interrupt routine (FIG. 2) for performing a key depression interruption process is executed.

When the key-depression interrupt routine is activated, first, in step S202, sound can be generated based on the key-depression operation by history assign or level assign using an assigner based on a known technique. A voice is selected and the voice number of the selected voice is written to V. If the selected voice is being sounded, a process of rapidly stopping the sounding of that voice is performed.

When the process of step S202 is completed, the process proceeds to step S204, where the CPU 10 detects the key number (KEY #) of the key on which the key depression operation has been performed, and calculates the pitch corresponding to the key number. To do. The pitch thus calculated is stored in DEST_P [V],
It proceeds to step S206.

In step S206, LAST_VOI
It is determined whether CE is "0".

First, the case where the determination result of step S206 is affirmative (Y), that is, LAST_VOICE is "0" will be described. In this case, step S208
Go to. As described above, the case where LAST_VOICE is “0” means that there is no key pressing operation before the key pressing interrupt processing, and the key pressing operation that started the key pressing interrupt processing is performed when the power is turned on. LAST_VO
This is the first key depression operation after the ICE is initialized to "0".

In step S208, step S204
The value stored in DEST_P [V] at
_P [V], and the process proceeds to step S210.

In step S210, the arithmetic expression of (DEST_P [V] -CUR_P [V]) / TIME is executed, and the arithmetic result is stored in RATE [V]. The RATE [V] thus obtained is used as a unit of change when the pitch is smoothly changed in order to give the portamento effect in the timer interrupt processing described later.

However, in the case of proceeding from step S208, in step S208, DEST_P
Since the value stored in [V] is stored in CUR_P [V], the operation result of the operation of (DEST_P [V] −CUR_P [V]) / TIME becomes “0”, and “RATE [V] =
Since it is set to "0", the portamento effect is not actually given.

When the processing of step S210 is completed, the process proceeds to step S212, and the voice V is started to sound at the pitch stored in CUR_P [V] (that is, the pitch stored in DEST_P [V]). Therefore, the musical tone is sounded at the pitch stored in DEST_P [V] from the pitch at which the sound is generated.

When the processing of step S212 is completed, the process proceeds to step S214, the voice number stored in V is written in LAST_VOICE, and the interruption waiting state is prepared after preparation for the next key depression interruption processing.

Next, when the result of the determination in step S206 is negative (N), that is, when LAST_VOICE is not "0" (when there is a key depression operation before the key depression operation that activated the key depression interrupt processing). Will be described. In this case, the process proceeds to step S216.

At step S216, LAST_VOI
The voice number stored in CE is written in V '.

When the process of step S216 is completed, the process proceeds to step S218, and it is determined whether or not "1" is set in SW. This judgment result is affirmative, that is,
"SW = 1" (the portamento mode switch 26 is switched to the "+ 5V" side, and the keyboard section 14
The current voice of the voice selected in response to the keypress immediately before
"Mode: Set the pitch as the starting pitch for this key depression"
1 ”is selected. ), Step S22
Go to 0 and change the value of CUR_P [V '] to CUR_P [V]
To memorize. Therefore, in this case, the current pitch of the voice selected by the immediately preceding key depression is set to the current pitch of the voice selected by the key depression that activated the key depression interrupt processing. When the process of step S220 ends, the process proceeds to step S210.

On the other hand, the determination result of step S218 is negative, that is, "SW = 0" (the portamento mode changeover switch 26 is switched to the "ground" side, and the key depression just before the keyboard portion 14 is performed. In the case of "mode: 0" in which the pitch to be reached by the selected voice is set as the start pitch of this key depression,) the process proceeds to step S222, and the value of DEST_P [V '] is set. C
Store in UR_P [V]. So in this case,
The pitch to be reached by the voice selected by the immediately preceding key depression is set as the current pitch of the voice selected by the key depression that activated the key depression interrupt processing. Step S22
When the process of 2 is completed, the process proceeds to step S210.

As described above, in step S210, the operation expression of (DEST_P [V] -CUR_P [V]) / TIME is executed, and the operation result is stored in RATE [V].

When the process of step S210 is completed, the process proceeds to step S212, and the voice V is started to sound at the pitch stored in CUR_P [V]. In this way, the pitch at which the tone generation of the musical sound to which the portamento effect is applied is started is determined with reference to the pitch of the voice generated by the immediately preceding key depression.

At this time, in the case of "mode: 1",
Since "CUR_P [V] = CUR_P [V ']", the musical tone to which the portamento effect is applied is started to be produced at the current pitch of the voice being produced by the immediately preceding key depression. Further, in the case of "mode: 0", "CUR_P
Since [V] = DEST_P [V ′] ”, the musical tone to which the portamento effect is applied is started to be produced at the pitch that the voice being produced by the immediately preceding key depression should reach.

When the process of step S212 is completed, the process proceeds to step S214, the voice number stored in V is written in LAST_VOICE, and the interrupt waiting state is prepared after preparation for the next key depression interrupt process.

By the above processing, the tone generation start pitch for a new key depression is set (step S208, step S22).
0, step S222) is performed.

Next, a timer interrupt process for actually giving a portamento effect will be described. This timer interrupt processing is executed by a timer interrupt routine (FIG. 3) which is activated each time a timer interrupt is applied to the CPU 10 at a time interval of 10 msec.

This timer interrupt routine is used for voice 1
Since all the voices of the voices 24 to 24 are processed, in step S302, SV is initialized to store "1", and preparations for processing from voice 1 are made, and the process proceeds to step S304.

In step S304, CUR_P [S
It is determined whether or not V] is equal to DEST_P [SV]. When the result of this determination is affirmative, that is, when CUR_P [SV] and DEST_P [SV] match (meaning that the pitch currently sounded and the pitch to be reached match). Since it is not necessary to add the portamento effect, the process jumps to step S306, SV is incremented by "1" and the process proceeds to step S308.
It is determined whether V is larger than "24".

If the result of the determination in step S308 is affirmative, that is, if SV is larger than "24", it means that the timer interrupt processing has been performed for all the voices 1 to 24, so that the timer interrupt is issued. It ends and enters the interrupt waiting state.

On the other hand, if the result of the determination in step S308 is negative, that is, if SV is "24" or less, timer interrupt processing has not been performed on all voices, so timer interrupt processing is performed. In order to process the remaining unvoiced voices, the process returns to step S304 and the process is repeated.

The determination result of step S304 is negative, that is, CUR_P [SV] and DEST_P [SV].
Is different (the pitch being currently sounded has not reached the pitch to be reached), step S310.
Go to.

In step S310, CUR_P [S
V] plus RATE [SV] obtained in step S210 is newly stored as CUR_P [SV]. Therefore, the pitch can be changed by RATE [SV].

When the processing of step S310 is completed, the process proceeds to step S312, and it is determined whether or not CUR_P [SV] newly stored in step S310 has passed DEST_P [SV]. This judgment result is affirmative,
That is, when CUR_P [SV] has passed DEST_P [SV], CUR_ has already been added to DEST_P [SV].
Since P [SV] has arrived, DEST_P
[SV] is stored in CUR_P [SV], and CUR_P
Match [SV] with DEST_P [SV]. In this way, CUR_P [SV] is prevented from exceeding DEST_P [SV]. When the process of step S314 ends, the process proceeds to step S316.

On the other hand, the determination result of step S312 is negative, that is, CUR_P [SV] is DEST_P [SV].
Even when the vehicle has not passed through, the process proceeds to step S316.

In step S316, CUR_P [S
V], the pitch of the voice SV is changed. Therefore, the pitch of the voice SV being sounded is RATE [S
Therefore, the audience can hear the change in pitch of the musical tone.

When the process of step S316 is completed, the process proceeds to step S306, and the above process is performed.

Since the processing at the time of key release may be performed by using a known technique, the musical tone signal being generated by the voice being sounded corresponding to the released key number may be attenuated. Detailed description is omitted.

FIG. 4 shows a change diagram of the pitch with the key depression, and the solid line shows the change of the pitch in the case of "mode: 1". In the case of "mode: 0", only the portion indicated by the alternate long and short dash line is different from the change in pitch in the case of "mode: 1", and the other is the same.

First, the case of "mode: 1" will be described. In this case, if there is a "pitch C4 key depression" as the first key depression after the power is turned on, the pitch "C4" to be reached
To start pronunciation (step S202 → step S204 →
206 → step S208 → step S210 → step S212 → step S214, step S302 → step S304 → step S306 → step S30
8) will be done.

Next, if there is a "pitch D4 key depression", the pitch is smoothly changed from the pitch being currently sounded according to the RATE obtained in step S210, and the pitch "D4" is reached (step S202). → Step S2
04 → step S206 → step S216 → step S218 → step S220 → step S210 → step S212 → step S214, steps S302 to S316).

Further, when the process proceeds to "key pressing of pitch G4" and "key pressing of pitch A3", "key pressing of pitch A3".
Is in the process of changing to the pitch “G4” that should be reached by the immediately preceding key depression, but similarly to the above, from the pitch currently being sounded, according to the RATE obtained in step S210,
The pitch changes smoothly and reaches the pitch "A3".
Hereinafter, similar processing is performed.

Next, in the case of "mode: 0",
Explaining the points different from "mode: 1", "pitch C4 key depression" and "pitch D" after power-on in the same manner as above.
4 "and" pitch G4 "and then" pitch A3 ". At this time, the "pitch A3 key depression" is reached by the immediately preceding key depression "G4".
Although it is in the process of being changed to, the sound generation by the "pitch A3 key depression" is started from the arrival pitch "G4" by the "pitch G4 key depression". Then, the pitch smoothly changes according to the RATE obtained in step S210, and the pitch reaches “A3” (step S202 → step S204 → step S206 → step S216).
→ step S218 → step S222 → step S2
10 → step S212 → step S214, steps S302 to S316).

Further, there is a "key depression of pitch G3" and then a "key depression of pitch E3". At this time, the "pitch E3 key depression" is in the process of changing to the pitch "G3" which should be reached by the immediately preceding key depression. It starts from the arrival pitch "G3" by "key depression". And step S
The pitch changes smoothly according to the RATE obtained in step 210 and reaches the pitch "E3" (step S20).
2 → step S204 → step S206 → step S
216 → step S218 → step S222 → step S210 → step S212 → step S214, steps S302 to S316).

FIG. 5 shows a key-depression interrupt routine according to another embodiment of the key-depression interrupt process. The same processing contents as those of the key-depression interrupt routine shown in FIG. Therefore, detailed description will be omitted and only different processing contents will be described.

In step S202 of this embodiment, a key number table (a table for storing, for each key number, a voice number being sounded corresponding to a sounding start instruction of the key number). ), The voice number V is stored in the storage location corresponding to the key number (KEY #) of the newly pressed key. The process of storing the information indicating the relationship between the key number and the voice number is also performed in the normal assign process.

In the key depression interrupt processing shown in FIG.
As a buffer that replaces LAST_VOICE in FIG.
LAST_KEY will be set. LAST_
KEY is a buffer that stores the key number that was pressed immediately before, and is initialized to "-1" when the power is turned on.

When the key depression interrupt routine of FIG. 5 is started, the process proceeds from step S202 to step S204, and in step S506, it is determined whether or not LAST_KEY is "-1". If the determination result is affirmative, as in the key depression interrupt routine of FIG.
The sequence proceeds from 208 → step S210 → step S212.

When the processing of step S212 is completed, the flow proceeds to step S514, and the key number of voice V is set to LA.
The data is stored in ST_KEY and the process ends. The relationship between the key number and the voice number is the key number
You can find out by referring to the table.

On the other hand, if the decision result in the step S506 is negative, the process advances to a step S516, and LAST_KE.
The voice number of the voice of the key number matching the key number stored in Y is stored in V '. The relationship between the key number and the voice number is the key number
You can find out by referring to the table.

When the processing of step S516 is completed, step S218 → step S220 (step S22
2)-> step S210-> step S212-> step S514, in which the key number of voice V is LAST_.
The data is stored in the KEY and the processing is ended.

Even with the above processing, the same portamento effect as described with reference to FIG. 2 can be provided.

In the above embodiment, the pitch (pitch) is controlled as the musical tone control parameter in order to obtain a natural portamento effect, but the present invention is not limited to this, and other than the portamento effect. In order to realize other effects, other tone control parameters such as tone color and volume may be controlled.

Further, tone control parameters such as pitch, tone color and volume may be selectively controlled, or a plurality of tone control parameters may be controlled simultaneously.

Furthermore, in the above embodiment, an operator may be provided which can select whether or not to add portamento. In this case, if portamento is not added by the operator, the same processing as that in the case where the determination result of step S206 of the key depression interrupt routine shown in FIG. 2 is affirmative may be performed. Also, when adding portamento with the operator,
The mode may be selected by the mode switching operator 26.

[0091]

Since the present invention is constructed as described above, it has the following effects.

A plurality of musical tone generating means capable of generating musical tones respectively are provided, and any musical tone generating means is selected from the plurality of musical tone generating means in response to the pronunciation start instruction, and the musical tone start instruction is responded to. In a musical tone control device of an electronic musical instrument for generating a musical tone based on a parameter value of a musical tone control parameter by a musical tone generating means, a first parameter value for reading a musical tone for each of the plurality of musical tone generating means is stored. A storage means, a second storage means for storing a target parameter value of the musical sound generated by each of the plurality of musical sound generation means, and a new storage means for storing a new sound generation start instruction in response to a new sounding start instruction. The current parameter value of the musical sound generated by the musical sound generation means corresponding to the sound generation start instruction immediately before the sound generation start instruction is read, and the read parameter value is used as a new sound generation start instruction. In response to a new sounding start instruction corresponding to the first storage control means to be stored in the first storage means and the new sounding start instruction as the current parameter value of the musical sound generated by the corresponding sound generating means. Second storage control means for storing the parameter value of the musical sound in the second storage means as the target parameter value of the musical sound generated by the musical sound generation means corresponding to the new sounding start instruction, and the first storage means And a parameter value corresponding to each musical tone generating means stored in the second storage means, and an interpolating means for gradually approaching the parameter value corresponding to each musical tone generating means stored in the second storage means over time. Therefore, in response to the new pronunciation start instruction by the first storage control means, the tone generation means corresponding to the pronunciation start instruction immediately before the new pronunciation start instruction is generated from the first storage means. The current parameter value of the musical tone is read out, and the read parameter value is stored in the first storage means as the current parameter value of the musical tone generated by the musical tone generating means corresponding to the new sounding start instruction. Remembered.

Further, the second storage control means sets the parameter value of the musical tone based on the new sounding start instruction as the target parameter value of the musical tone generated by the musical sound generating means corresponding to the new sounding start instruction. , Stored in the second storage means.

Further, by the interpolating means, the parameter value corresponding to each tone generating means stored in the first storing means is changed to the parameter value corresponding to each tone generating means stored in the second storing means by the time. It can be gradually approached as time passes.

Therefore, the pronunciation of the musical sound based on the new sounding start instruction is generated by the musical sound generating means corresponding to the sounding start instruction immediately before the new sounding start instruction stored in the first storage means. It starts with the current parameter value of the musical tone and gradually approaches the target parameter value of the musical tone generated by the musical tone generating means corresponding to the new sounding start instruction stored in the second storage means.

[0096]

[0097]

[0098]

Since the tone control parameter is a parameter for controlling the tone pitch of the tone, the tone pitch of the tone sounded based on the new sounding start instruction is stored in the first storage means. The new sounding start instruction which is started by the current parameter value of the musical sound generated by the musical sound generating means corresponding to the sounding start instruction immediately before the new sounding start instruction and is gradually stored in the second storage means. To the target parameter value of the musical tone generated by the musical tone generating means corresponding to.

Therefore, according to the present invention, even when a plurality of musical tones are simultaneously generated by a plurality of musical tone generating means, a musical tone control parameter, for example, a parameter for controlling the pitch of the musical tone is set to the immediately preceding start of tone generation. The control is performed in association with the parameter value based on the instruction, and it is possible to prevent a musical unnatural feeling.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electronic musical instrument including a musical tone control device for an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a flowchart of a key depression interrupt routine.

FIG. 3 is a flowchart of a timer interrupt routine.

FIG. 4 is an explanatory diagram showing a change in pitch.

FIG. 5 is a flowchart of a key depression interrupt routine of another embodiment of key depression interruption processing.

[Explanation of symbols]

10 CPU 12 timers 14 keyboard 16 ROM 18 RAM 20 Musical sound generator 22 Sound emitting part 24 speakers 26 Portamento mode switch

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Claims (2)

(57) [Claims] 1. A plurality of musical tone generating means capable of respectively generating musical tones are provided, and any musical tone generating means is selected from the plurality of musical tone generating means in response to a sounding start instruction.
In a musical tone control device of an electronic musical instrument for generating a musical tone based on a parameter value of a musical tone control parameter by a musical tone generating means corresponding to the pronunciation start instruction, First storage means for storing a parameter value, second storage means for storing a target parameter value of a musical sound generated by each of the plurality of musical sound generating means, and corresponding to a new pronunciation start instruction, From the first storage means, the current parameter value of the musical sound generated by the musical sound generation means corresponding to the sound generation start instruction immediately before the new sound generation start instruction is read, and the read parameter value is used as the new sound generation. First storage control means for storing in the first storage means as a current parameter value of the musical sound generated by the musical sound generation means corresponding to the start instruction, In response to the new pronunciation start instruction, the parameter value of the musical tone based on the new pronunciation start instruction is set as the target parameter value of the musical tone generated by the musical tone generation means corresponding to the new pronunciation start instruction, Second memory control means to be stored in the second storage means, and parameter values corresponding to each musical sound generation means stored in the first storage means, to generate each musical tone stored in the second storage means. A musical tone control apparatus for an electronic musical instrument, comprising: an interpolating unit that gradually approaches a parameter value corresponding to the unit with the passage of time. 2. The musical tone control parameter is a parameter for controlling the pitch of a musical tone.
A musical tone control device for the electronic musical instrument described.