JP2979322B2 - Sound image localization device for electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an electronic musical instrument, in which the sound image localization of musical tones is changed for each tone generation, and the performer composed of these musical tones is rich in spatial expanse and variation. The present invention relates to a sound image localization device that provides an effect.

(Prior Art) As means for giving a spatially expanded and varied effect to a performance sound by changing the sound image localization of a musical sound for each sounding, for example, as shown in Japanese Patent Publication No. 63-22311, A method of sequentially changing the sound image localization signal commonly used for the musical tones of each tone, or Japanese Patent Publication No. Sho 62-62356
As shown in the patent publication, a sound image localization control signal that changes over time is generated and stored when a key is pressed, and the sound image localization of a tone corresponding to the key depression is controlled based on the stored sound image localization control signal. A method of doing so is known.

(Problems to be Solved by the Invention) According to the method disclosed in Japanese Patent Publication No. Sho 63-22311, there is a problem that the sound image of all musical sounds is localized at the same position, and the sense of spread is impaired. .

On the other hand, according to the method disclosed in the above-mentioned Japanese Patent Publication No. 62-35656, a sound image of a plurality of musical sounds can be localized at different positions, so that a sense of spaciousness can be obtained.

However, none of the prior application publications disclose anything about localizing a sound image at a position deviated leftward or at a position deviated rightward.

Note that Japanese Patent Publication No. 62-62356 discloses that the amplitude of a sound image localization control signal is set to vary the sense of spread of a sound image. It does not localize the sound image.

That is, the techniques disclosed in these prior applications are diversified in terms of sound image localization,
It made the performers feel unsatisfactory.

The present invention aims to solve such problems, while changing the sound image localization of each musical tone for each sound,
An electronic musical instrument capable of providing a performer with a wide range of effects and a variety of changes and performing various sound image localization modes by performing localization control in a limited range corresponding to a set predetermined position. Is provided.

(Means for Solving the Problems) In order to solve the above-described problems, the sound image localization position of the electronic musical instrument according to the present invention is, as shown in FIG. Sound image localization data generating means (1) for generating different sound image localization data for each sounding instruction, and position setting means (6) for setting a predetermined position of sound image localization.
The sound image of each musical tone generated corresponding to each sounding instruction is placed at a predetermined position set by the position setting means based on sound image localization data generated for each sounding instruction by the sound image localization data generating means. Sound image localization control means for performing localization control in a corresponding limited range to localize sound images of a plurality of musical sounds corresponding to each of the sounding instructions to mutually different positions when a plurality of sounding instructions are simultaneously issued (2) And.

(Operation) When sounding localization data is generated by the sound image localization data generating means, different sound image localization data are generated for each sounding instruction. The sound image of each musical tone generated in response to each sounding instruction is limited by the sound image localization control means based on the sound image localization data corresponding to each sounding instruction and corresponding to a predetermined position set by the position setting means. Localization is controlled in the range. Thus, when a plurality of sounding instructions are issued at the same time, a plurality of sound images corresponding to each sounding instruction are localized at different positions within a limited range corresponding to the set predetermined position.

(Effects of the Invention) Therefore, according to the present invention, the sound image localization changes for each musical tone corresponding to each sounding instruction, and the sound image is localized in a limited range corresponding to the set predetermined position. The sound image localization can be diversified by changing and setting a predetermined position of the sound image localization by the position setting means.

(Example) Next, a specific example of a sound image localization device for an electronic musical instrument according to the present invention will be described with reference to the drawings.

FIG. 2 schematically shows an electronic musical instrument to which the present invention is applied. To specify the pitch of the musical tone to be pronounced
A key press / key release state based on a key press / key release operation of each key from the keyboard section 20 composed of 61 keys.
The key information including the key release information is supplied to the microcomputer 21 via the bus 22 under the control of the microcomputer 21. The microcomputer
21 is a central processing unit (CPU) 2 for executing a predetermined program
1A, a read-only memory (ROM) 21B for storing a program to be executed and a random number table for generating localization data necessary for executing the program, and a working memory including a key map and various registers required for executing the program. And a writable memory (RAM) 21C. By executing the program based on the key information, the tone generation circuit 23 is controlled to generate a desired tone signal, and the localization control circuit 24 is further controlled to obtain a desired localized tone signal. . The timing signal generation circuit 25 generates a plurality of timing signals for synchronizing the respective circuits. Each of the generated timing signals is a tone generation circuit 23, a localization control circuit 24, an S / H circuit 27.
(Sample & hold circuit) and the S / H circuit 28. The tone generating circuit 23 has eight tone generating channels and simultaneously generates eight tone signals, and supplies these eight tone signals to the localization control circuit 24 in a time division manner under the control of the timing signal. The localization control circuit 24 has eight localization data storage registers corresponding to each tone generation channel for storing localization data. Based on the localization data supplied and stored from the microcomputer 21 under the control of the timing signal, 8 time-divisionally supplied from the tone generator 23
The two tone signals are supplied to the D / A converter 26 in a time-division manner as two tone signals of the L channel and the R channel which are subjected to localization control. The D / A converter 26 converts the two time-divided supplied tone signals into two time-divided analog signals, and converts them into an S / H circuit 27.
And to the S / H circuit 28. S / H circuit 27 and S / H circuit 2
8 separates the time-division-supplied analog signal into two time-continuous signals under the control of the timing signal, and supplies them to the alias removing filters 29 and 30 respectively. The signal supplied to the filter 29 is output as an L-channel tone through an amplifier 31 and a speaker 32, and the signal supplied to the filter 30 is output as an R-channel tone via an amplifier 33 and a speaker 34. .

FIG. 3 shows a main routine executed by the microcomputer 21.

A Start the execution of the program by turning on the power.
Initialize the M21C and the tone generator 23.

B: Transfer the storage contents of the area for storing the old key state of the key map provided in the RAM 21C to the storage area for storing the new key state, and read the key state from the keyboard unit 20 and store the new key state of the key map. Write in the area where The key map is composed of 61 blocks corresponding to each key selected by the key map addresses (1 to 61), and each block is composed of two areas for storing new and old key states.

C The value of the key map address is 1.

Judge whether the keymap address is greater than 61,
If it is larger than 61, the new key press detection has been completed, so step H
If it is not larger than 61, the detection of a new key press is not completed, so the flow proceeds to step E.

E The new / old key state stored in the block selected by the key map address of the key map is compared, and it is determined whether or not a new key is pressed by a change in the key state, and the key state is changed and a new key is pressed. If the key has not been changed and the key state has not changed, the process proceeds to step G.

F Perform sound generation processing. The sound generation processing is for performing processing relating to sound generation and generation of localization data.
It will be described later with reference to the drawings. Since step F is performed each time one new key is detected, different localization data is generated even when a plurality of keys are simultaneously pressed.

G Increase the value of the key map address by one.

HL Processes related to key release are performed in the same manner as in steps CG described above. In the silencing processing of step K, a silencing instruction is given to a tone generating channel corresponding to the released key.

FIG. 4 shows a sound generation processing routine executed by the microcomputer 21.

F-1 A tone generation channel to be used corresponding to the depressed key is determined. Since such a technique is well known, detailed description is omitted.

F-2 New localization data is generated by referring to the random number table stored in the ROM 21B, and is generated in a localization data storage register in the localization control circuit 24 corresponding to the tone generation channel determined in step F-1. Write the localization data. The random number table has a size of 256 words, and data of an address indicated by a value stored in a read address register set in the RAM 21C is read. The content stored in the address register is set to the start address of the random number table in step A when the power is turned on, and is incremented by one each time reading of the random number table is completed, to prepare for the next reading. (If the stored content of the address register is the last address of the random number table, the stored content is used as the top address of the random number table at the end of reading.) F-3 Musical tone control corresponding to a newly depressed key The data is supplied to the tone generation channel determined in step F-1, and a tone generation instruction is issued.

FIG. 5 shows the details of the localization control circuit 24, and FIG. 6 shows the operation timing of each unit. One sampling period is divided into 16 time slots from 1 to 16, as shown in the uppermost part of FIG. As shown in FIG. 6, the tone signal a output from the tone generating circuit 23 is output in time division form from the output channels ch1 to ch8 of eight tone generating channels and supplied to one input of a multiplier 51 in the localization control circuit 24. Is done. Register 1 is a localization data storage register provided corresponding to the first tone generation channel.
Localization data is written from 21. Similarly, registers 2 to 8 are provided corresponding to the other tone generation channels 2 to 8, respectively. The outputs of the registers 1 to 8 are supplied to the selector 52. The selector 52 selectively outputs each input as shown in FIG. 6B under the control of a timing signal (not shown).
Here, D1, D2 to D8 indicate outputs of the registers 1 to 8, respectively. As shown in the figure, the outputs of the registers 1 to 8 are selectively output during odd slots. The output of the selector 52 is supplied to the other input of the multiplier 51 and, at the same time, is converted to a one's complement via an inverter 53 and then supplied to a complement register 54. The complement register 54 has a timing signal c which rises at the end of each odd slot shown in FIG.
, The storage contents are updated by the rise of the data, and the one's complement of the output of the selector 52 at the time of the odd slot, that is, the one's complement of the storage contents of the registers 1 to 8 is stored. The output of the complement register 54 is also supplied to the selector 52. selector
52 selects the output of the correction register 54 in the even slot. Therefore, as shown in FIG. 6, the final output b of the selector 52 is the output of each of the registers 1 to 8 in the odd-numbered slot, and the one's complement of the stored contents of each register in the even-numbered slot. (▲ ▼ to ▲ ▼ are D1 to D8
Note that these data D1 to D8 supplied to the multiplier 51 are the localization coefficients of the L channel of each tone signal, and ▼ to ▲ are the localization coefficients of the R channel. Since the localization coefficient of the R channel is a one's complement of the localization coefficient of the L channel, the sum of the localization coefficient of the L channel and the localization coefficient of the R channel is always constant. If the localization coefficient of the L channel is large (small), R The localization coefficient of the channel decreases (increases). The multiplier 51 is 2
The data supplied to the two inputs are multiplied, and volume control based on the localization coefficient is performed for each of the L and R channels to determine the localization. The operation result d of the multiplier 51 is supplied to the accumulator 55. The output d of the multiplier 51 is the data L1 as shown in FIG.
LL8 and R1 to R8. Here, L1 to L8 indicate the product of the output of each tone generation channel 1 to 8 and the coefficient D1 to D8, and R1 to R8 indicate the product of the output of each tone generation channel 1 to 8 and the coefficient ▲ ▼ to ▲ ▼. These are the L channel output and the R channel output of each tone generation channel. The accumulator 55 performs the accumulation of the supplied data L1 to L8 and the accumulation of R1 to R8 during a cycle of the sampling cycle under the control of a timing signal (not shown). As shown in FIG. 6, the accumulated value L of L1 to L8 is outputted to the second slot, and the accumulated value R of R1 to R8 is outputted to the ninth slot and supplied to the output register 56. The output register 56 (the data being calculated is output in the other slots) has its stored contents updated by the rise of the timing signal f which rises at the end of the second and ninth slots shown in FIG. , The outputs of the accumulators 55 in the second and ninth slots, ie, the accumulated value L and the accumulated value R. As shown in FIG. 6, the output g is the accumulated value of the L channel from the third slot to the ninth slot, and the accumulated value of the R channel from the tenth slot to the second slot. These outputs g
Is supplied to a D / A converter 26 and converted into an analog signal, and then supplied to an S / H circuit 27 and an S / H circuit 28. S / H circuit 2
The S / H circuit 7 and the S / H circuit 28 perform the S / H operation in accordance with the timing signals h and i shown in FIG. 6, respectively. Sampling is performed when the timing signal is at a low level, and holding is performed when the timing signal is at a high level. As shown in FIG. 6, the timing signal h is low during the fifth to eighth slots, and the timing signal i is low during the thirteenth to sixteenth slots. Therefore, the S / H circuit 27 selectively outputs the accumulated value of the L channel, and the S / H circuit 28 selectively outputs the accumulated value of the R channel. The state of the outputs j and k of each S / H circuit is shown in FIG. In this way, the tone signal of each tone generation channel is given a volume difference between the two output channels (L, R), and the sound image localization control is performed.

In the above-described embodiment, an example in which the sound image is localized between the two output channels has been described. However, the sound image can be localized within a limited range around the set localization position. As an example of using two channels of L and R as output channels, the localization position data having a set data length of 8 bits is represented by P (0
≤P≤255), the localization data having a data length of 8 bits generated by referring to the table is RND (0≤RND≤255), and the localization data having a data length of 8 bits which is written to the localization data storage register and finally used is stored. RND2 (0 ≦ RND2 ≦ 255: the sound image localization position is the L channel when RND2 = 0, and the R channel when RND2 = 255), the calculation is performed according to the following formula, and the integer part of the calculation result is the localization data RND2.

When P <128 RND2 = P · RND / 127 When 128 ≦ P RND2 = (255−P) · RND / 127.5 + 2 · P−255 Possible range of RND2 (sound image localization position) when P is a parameter Is shown in FIG. (For example, in the case of P = 64, if RND changes between 0 and 255, RND2 changes between 0 and 128, resulting in localization biased toward the L channel.

As another example, the localization position data having the set data length of 8 bits is represented by P (0
.Ltoreq.P.ltoreq.255), D (0.ltoreq.D.ltoreq.255) for the set localization change width data having a data length of 8 bits, and RND (0.ltoreq.R) for the localization data having a data length of 8 bits generated by referring to the table.
ND ≦ 255), the localization data having a data length of 8 bits written to the localization data storage register and finally used is RND3
(0 ≦ RND3 ≦ 255: the sound image localization position is the L channel when RND3 = 0, and the R channel when RND3 = 255), and the calculation is performed according to the following formula, and the integer part of the calculation result is the localization data RN.
D3.

FIG. 8 shows a possible range of RND3 (sound image localization position) when RND3 = (D.RND = P. (255-D)) / 255P is used as a parameter. FIG. 8A shows the case where D = 128. For example, when P = 64, if RND changes between 0 and 255, RND3 becomes 31-159. Vary between. FIG. 8 (2) shows the case where D = 64. For example, when P = 64,
When RND changes between 0 and 255, RND3 changes between 47 and 111. Further, the localization position data P and the localization change width data D may be stored and set corresponding to each tone so that they are set corresponding to the tone.

In the above embodiment, the localization data generation processing is performed in common for each tone generation channel. However, the localization data generation processing may be performed for each music generation channel.

Further, in the above-described embodiment, the description has been given of the electronic musical instrument having the keyboard and operating according to the sounding instruction based on the key pressing operation (the generation of the localization data and the generation of the tone signal).
The sounding instruction may be based on sounding instruction information obtained through a communication means such as MIDI, or may be an automatic accompaniment device that automatically generates a plurality of musical tones one after another according to the key being pressed. An effect device or a device corresponding to each tone generated by the "echo effect device" disclosed in Japanese Patent Application Laid-Open No. 60-76796. In the case of using these devices, specific localization data may be generated in response to each sounding instruction corresponding to the key being pressed. For example, in the case of the echo effect device, the first sounding instruction generated in response to a key press generates localization data with the localization position at the center, and the next sounding instruction generated by the echo effect is localized. Generate localization data whose position is slightly left from the center, and generate localization data whose localization position is slightly right from the center for the next sounding instruction. It is conceivable to generate localization data such that the localization position is sequentially biased toward the ends (L channel side, R channel side) in response to the sounding instruction. In this case, an effect is obtained in which the musical tone generated after the key is depressed gradually spreads.

Further, in the above embodiment, the localization data is generated by referring to the table, but various generation methods can be used, such as generation by calculation.

In the above embodiment, one localization data is generated corresponding to one tone generation channel, and based on this, the L channel localization coefficient and its one's complement are used as the R channel localization coefficient. Two localization data may be generated for each channel and used as the L-channel localization coefficient and the R-channel localization coefficient, respectively. As a method of obtaining the localization coefficient from the localization data, another method such as subtraction or table reference may be used. Can also. In the above embodiment, the L channel localization coefficient and the R channel localization coefficient have a function in which the sum is always constant. However, this relationship is not limited to this, for example, the sum of squares of each coefficient is always constant. Such a thing may be used.

Further, in the above-described embodiment, since localization data having randomness is generated and localization control is performed based on the generated localization data, localization control with randomness is performed. If it is used, periodic function localization control can be performed. In addition, a plurality of patterns (random, triangular, etc.) of these localization data to be generated may be prepared, and a desired one may be selected and used, or may be set corresponding to a tone color. You may make it memorize | store and set corresponding to each tone color.

In the above-described embodiment, the localization data storage register is provided in the localization control circuit. However, it may be provided in correspondence with each musical tone to be generated. May be provided.

In the above-described embodiment, the case where one tone is generated corresponding to one key press has been described. However, when a plurality of musical tones are simultaneously generated corresponding to one key press, each tone is generated. One localization data may be generated in common, or localization data may be generated separately for each musical tone, and separate localization control may be performed for each musical tone.

In the above embodiment, the number of output channels is two, L and R. However, the number can be increased to an arbitrary number (two or more).
In this case, one localization data may be generated for each tone generation channel as in the above embodiment, and the localization coefficient for each output may be obtained based on the value. Alternatively, a plurality of localization data may be generated.

Further, in the above embodiment, the localization control is performed by the volume difference between the two output channels. However, the localization control may be performed by the phase difference, the time difference, the reverberation addition pattern, the reverberation addition amount, or a combination thereof between the two channels. Alternatively, a plurality of output channels may be provided to select a channel to output a musical tone. When the reverberation addition pattern and the reverberation addition amount are changed for each musical tone, not only the sound image localization but also the sound field is changed. For example, the effect of changing the perspective for each musical tone can be obtained.

Further, in the above-described embodiment, the localization control is performed after a tone signal is generated as a method of performing the localization control. However, one tone is formed using two or more tone generation channels. Localization control may be performed by controlling each tone generation channel such that the volume, phase, time, reverberation addition pattern, reverberation addition amount, or combination thereof of each tone signal generated by each tone generation channel is different. Good.

[Brief description of the drawings]

FIG. 1 is a block diagram corresponding to the configuration of the present invention, and FIGS. 2 to 8 are drawings for explaining a specific embodiment of an electronic musical instrument according to the present invention. FIGS. 3 and 4 are flow charts of a main routine of a program executed by a microcomputer and a sound generation processing routine, respectively. FIG. 5 is an explanatory diagram for explaining a localization control circuit. FIG. 6 is a localization control. FIGS. 7 and 8 are explanatory diagrams for explaining the operation timing of the circuit, and FIGS. 7 and 8 are explanatory diagrams for describing the sound image localization position. 1 ... sound image localization data generating means 2 ... sound image localization control means 6 ... position setting means 20 ... keyboard section 21 ... microcomputer 21A ... central processing unit CPU 21B ... read-only memory ROM 21C ... writable memory RAM 22 Bus 23 Music tone generator 24 Localization control circuit 25 Timing signal generator 26 D / A converter 27 S / H circuit 28 S / H circuit 29 Filter 30 …… Filter 31 …… Amplifier 32 …… Speaker 33 …… Amplifier 34 …… Speaker

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Takao Watase 3-13-13 Shinkitajima, Suminoe-ku, Osaka-shi, Osaka Inside Roland Corporation (56) References JP-A-57-195291 (JP, A) JP-A-58-16092 (JP, A) JP-A-60-75887 (JP, A) JP-A-62-183494 (JP, A) JP-A-2-216194 (JP, A) JP-A-2-188879 (JP) JP-A-57-34593 (JP, A) JP-B-58-27516 (JP, B2) JP-B-48-26285 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB G10H 1/00 G10K 15/00-15/12

Claims (2)

(57) [Claims] 1. A sound image localization data generating means for generating different sound image localization data for each sounding instruction of a plurality of sounding instructions specified at different timings, and a position for setting a predetermined position of the sound image localization. Setting means, and a sound image of each musical tone to be generated corresponding to each sounding instruction, based on sound image localization data generated for each sounding instruction by the sound image localization data generating means. By performing localization control in a limited range corresponding to the position, when a plurality of sounding instructions are simultaneously issued, sound image localization control means for localizing sound images of a plurality of musical sounds corresponding to each sounding instruction to mutually different positions. A sound image localization device for an electronic musical instrument, comprising: And a change width setting means for setting a change width of the sound image localization, wherein said sound image localization control means is set by said change width setting means corresponding to a predetermined position set by said position setting means. 2. The sound image localization apparatus for an electronic musical instrument according to claim 1, wherein the sound image is localized within a range of the change width.