JPH06303700A - Sound image motion controller - Google Patents

Abstract

PURPOSE:To move repetitively a sound image generated by a sound sounded within a predetermined space along with an orbit stored in matching with the extent and shape of the space in advance such that an electronic musical instrument is played in a concert hall, for example. CONSTITUTION:For example, an electronic keyboard musical instrument is played in a concert hall, sound image moving data used to move a sound image of a played musical sound along an orbit in matching with the hall are selected from a panning ROM in a panning control circuit 108 based on the result of measuring a distance of plural sets of two points representing the extent and shape of the hall by an extend measurement device 106. Then a sound image moving means controls share of musical sound quantity sounded from an L channel speaker 110 and an R channel speaker 112 to control the localization of the sound image of both the L and R channels, and the entire musical sound volume sounded from both the speakers 110, 112 is controlled and the sound image is moved in the front/rear direction to move the sound image repetitively in the forward/backward/left/right directions along the orbit in matching with the concert hall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound image movement control device for repeatedly moving a sound image generated by an acoustic signal along a previously stored trajectory.

[0002]

2. Description of the Related Art Conventionally, in order to obtain a special sound effect, for example, a sound image of a musical sound played in a performance hall is moved along a predetermined trajectory.

However, since the size and shape of the performance hall differ, the sound image may be moved in a trajectory that does not match the size and shape of the hall. Therefore, in order to prevent such a thing, before the performance begins,
It was necessary to set the size and shape of the track by operating the operation switches, etc., according to the size and shape of the venue.

[0004]

However, since the distance between the speakers for emitting musical sounds and the distance between the speakers and the audience differ depending on the size and shape of the performance hall, the size and shape of the trajectory of the moving sound image. There is a problem that it is difficult to set the track according to the size of the performance hall judged visually by operating the operation switch etc., especially in the limited time before the performance. .

An object of the present invention is to realize a sound image movement control device for repeatedly moving a sound image of a musical tone to be played along an orbit automatically set according to the size and shape of a performance hall. is there.

[0006]

The present invention firstly has distance measuring means for measuring the distance between a plurality of sets of two points related to the size and shape of the space in which the sound image movement control device is placed. For example, the means reflects the ultrasonic waves on the back wall and the left and right walls of the venue where the musical instrument is played, and receives the reflected waves to determine the distance indicating the size and shape of the venue. It is a means of measuring.

Next, a plurality of sets of 2 measured by the distance measuring means
Sound image movement data storage means for storing a plurality of sets of sound image movement data for repeatedly moving the position of the sound image along an orbit corresponding to the size and shape of the space corresponding to the distance between the points,
For example, it has a ROM.

Further, there is provided sound image movement data reading means for reading the sound image movement data corresponding to the distance between the plurality of pairs of points measured by the distance measuring means from the sound image movement data storage means.

Further, it has a sound image moving means for repeatedly moving the sound image along a trajectory based on the sound image moving data read by the sound image moving data reading means. The means includes, for example, a volume coefficient storage unit that stores a volume coefficient that continuously changes according to an incremented address, a volume coefficient reading unit that reads the volume coefficient from the volume coefficient storage unit, and a volume coefficient reading unit. It is composed of acoustic signal amplitude control means for controlling the amplitude of a plurality of acoustic signal outputs using the read volume coefficient.

[0010]

The sound image movement data for repeatedly moving the sound image generated by the acoustic signal output along the trajectory corresponding to the size and shape of the space corresponding to the distance between the plurality of sets of two points measured by the distance measuring means. Is read from the sound image movement data storage means by the sound image movement data reading means.

Then, the sound image moving means repeatedly moves the sound image by the acoustic signal output along the trajectory based on the sound image moving data.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an electronic keyboard instrument will be described in detail below with reference to the drawings.

In FIG. 1, first, the width measuring device 106
As shown in FIG. 2, by reflecting ultrasonic waves, for example, on the rear wall and left and right walls of the performance hall and receiving the reflected waves, the measurement result of the distance indicating the size and shape of the performance hall can be obtained. , RAM 103.

Next, the CPU 101 operates based on the control program stored in the ROM 102 while using the RAM 103 as a work memory, and the switch group 1
05, the keyboard 104, and the RAM 103 are scanned, and the operation data of the switches and keys, the measurement data regarding the size and shape of the performance hall, and the like are captured.

Further, the CPU 101 sends the sound generation control data to the sound source 107 to control the sound generation operation thereof, and based on the measurement result of the distance indicating the size and shape of the venue measured by the width measuring instrument 106, A sound image movement data selection signal is sent to the panning control circuit 108 in order to select sound image movement data for moving (panning) the sound image to a trajectory suitable for the venue.

The panning control circuit 108 includes a CPU 10
According to the sound image movement data selection signal sent from the No. 1, a predetermined sound image movement data is selected from a panning ROM 302, which will be described later, in which plural sets of sound image movement data are stored. Then, the panning control circuit 108
The selected sound image movement data is used to change the volume distribution of the musical sound emitted from the L channel speaker 110 and the R channel speaker 112 via the L and R channel amplifiers 109 and 111, and the By changing the sound image localization and controlling the overall volume of the musical sound emitted from the speakers 110 and 112, and moving the sound image forward and backward as viewed from the audience, the size of the performance hall,
The sound image is repeatedly moved along a predetermined trajectory matching the shape.

Next, FIG. 3 shows the panning control circuit 1 of FIG.
It is a block diagram of 08. In FIG. 3, the panning RO
As indicated by the solid line in FIG. 4, M302 is an L that is multiplied by the tone signal in order to change the volume of the L and R channels in opposite directions when the address changes continuously.
In order to move the sound image of the musical sound forward and backward as viewed from the audience, the sound volume of the left and right channels is changed at the same time as shown in FIG. , L, R front and rear volume coefficients to be multiplied by the tone signals of the respective channels are stored.

Next, based on the sound image movement data selection signal sent from the CPU 101, the CP from the panning ROM 302 storing a plurality of sound image movement data is stored.
The sound image movement data is selected according to the size and shape of the venue judged by U101.

First, the tone volume signal from the sound source 107 is multiplied in the multiplier 301 by the front-back volume coefficient of the sound image movement data read out from the panning ROM 302 by a not-shown address counter. next,
The output of the multiplier 301 according to the magnitude of the front-back direction volume coefficient is a multiplier 303 that controls the magnitude of the L channel musical tone signal and the magnitude of the R channel musical tone signal, respectively.
It is input to the multiplier 304.

In this way, the panning ROM 30
According to the change of the front-back direction volume coefficient read from 2,
L channel speaker 110 and R channel speaker 1
The volume of the musical sound emitted from 12 is controlled, and the sound image of the musical sound seen from the audience is panned back and forth.

Next, the L channel left / right volume coefficient of the sound image movement data read out from the panning ROM 302 by an address counter (not shown) is multiplied by the tone signal output from the multiplier 301 in the multiplier 303. Then, an L channel musical tone signal is generated. Further, the L channel left / right volume coefficient is the coefficient conversion circuit 3
In 05, it is converted into the R channel left-right coefficient as shown by the broken line in FIG.
Is multiplied by the musical tone signal which is the output of R to generate the R channel musical tone signal. In this case, each time the count value of the address counter is repeatedly output, the horizontal volume coefficient is repeatedly read from the panning ROM 302.

In this way, the panning ROM 30
Depending on the change in the horizontal volume coefficient read from 2,
L channel speaker 110 and R channel speaker 112
Since the volume of the musical sound emitted from is changed in the opposite direction, the sound image of the musical sound seen from the audience is panned left and right.

As described above, according to the data measured by the width measuring device 106, the ROM 3 for panning is used.
The sound image is moved along a predetermined trajectory according to changes in the front-rear volume coefficient and the left-right volume coefficient of the sound image movement data read from 02.

Next, the operation of this embodiment will be described with reference to the operation flowchart of FIG. In FIG. 6, first, the RAM 103 and the registers in the CPU 101 of FIG. 1 are reset as an initialization process (step S60).
1). Next, the size detector 106 is instructed to measure the distance from the stage indicating the size and shape of the performance hall to the rear wall and the left and right walls (step S602). Then, the measurement is started, and it is determined in step S603 whether or not the measurement is completed. When the measurement is completed and the determination in step S506 is Y
When it becomes ES, the measurement data is stored in the A register (step S604).

Next, after the key pressing / key releasing state of the keyboard 104 (see FIG. 1) is scanned (step S605), it is determined whether or not there is a change in the key state (step S60).
6). If the determination in step S606 is NO, that is, if there is no change in the key, the process returns to step S605, and the same processing as before is continued.

If the determination is YES and the key is released (Key OFF), the mute processing is performed (step S607), and then the key scanning (step S605) is continued. Furthermore, if the determination in step S606 is YES, pressing a new key (New Key
If it is y ON), it is determined in step S608 whether the panning start flag STF is 0 or not. It should be noted that the panning start flag STF is a flag that is set at the start of panning the sound image of the musical sound to be played on a predetermined trajectory as described above. At present, immediately after the new key is turned on, the same flag has not been set yet, so the determination in step S608 is YES, and "1" is assigned to the panning start flag STF (step S609).

Next, based on the measurement data stored in the A register, the sound image movement data for moving the sound image along the trajectory according to the size and shape of the venue judged by the CPU 101 is panned in FIG. The start address of the same-tone image movement data is stored in the register STA (start address) in order to select from the ROM 302 for recording (step S610).

After that, key data such as the key number and key-on information of the depressed key is sent to the sound source 107 (FIG. 1), and the musical tone signal controlled by the panning control circuit 108 is changed to the L channel speaker 110 and the R channel speaker. The sound is output from the channel speaker 112 (step S611).

Thereafter, the process returns to step S605 and the same processing as described above is performed. In this way, the sound image of the generated musical sound is moved on the orbit according to the size and shape of the venue.

Next, the timer interrupt processing for reading the sound image movement data from the panning ROM 302 will be described with reference to the operation flowchart of FIG. First, the panning R stored in the register STA
The start address of the OM 302 is sent to the panning control circuit (step S701).

Next, the start address STA is incremented (step S702), and it is determined whether or not the end address of the track is reached (step S70).
3). If the determination is YES, step S in FIG. 6 described above.
Similar to 610, the start address for selecting the sound image movement data matched to the size and shape of the venue from the panning ROM 302 based on the measurement data stored in the A register is the register STA ( It is stored in the start address) (step S704).

On the other hand, if the determination in step S703 is no, the process directly proceeds to the next process. In this way, when the sound image makes one round in the orbit, it returns to the start address of the sound image movement data again, and the sound image is repeatedly moved along the same orbit as the previous time.

The above-described panning operation is performed only for a certain period of time after the key is pressed. FIG. 8 is an operation flowchart relating to the timer interrupt processing for that purpose.

In FIG. 8, first, the start flag ST
It is determined whether "0" is set in F (step S
801), if the determination is NO, the process proceeds to the main flow without performing any processing, and if the determination is YES, it is determined in the next step S802 whether or not there is a key depression. When the key is pressed, the timer TM is cleared (step S803), and when the key is not pressed, the process directly returns to the main flow.

Next, in step S804, after the timer TM is incremented for each timer interrupt period, it is determined whether or not the timer TM is equal to a predetermined maximum number MAX (step S805).

In this way, until the determination in step S805 becomes YES, the timer TM is set in step S804.
Are sequentially incremented, and when the determination in step S805 is YES, "0" is assigned to the start flag STF. (Step S806).

As described above, the key is depressed, and (TM
= MAX) × (timer interrupt cycle) until the time corresponding to the start flag STF is “1”.
Since the sound is raised, the sound image of the musical sound generated by pressing the key continues to move on a predetermined orbit during that time.

[0038]

According to the present invention, for example, when a musical instrument is played at a performance hall, a plurality of two pieces indicating the size and shape of the hall are displayed.
Only by measuring the distance between the points by the distance measuring means, it is possible to automatically move (pan) the sound image of the musical sound to be played along the trajectory matched to the venue.

Therefore, it is not necessary to visually judge the size and shape of the performance hall and set the trajectory according to the size with the operation switch, etc. Especially, when the performance hall changes, the distance between the speaker and the audience, and the distance between the speakers. When the interval of is changed, it is possible to complete the preparation for the panning operation of the sound image even for a short time before the performance.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a present embodiment.

FIG. 2 is a diagram showing a width measuring instrument and sound image panning in a performance hall.

FIG. 3 is a configuration diagram of a panning control circuit.

FIG. 4 is a diagram showing an example of a horizontal volume coefficient stored in a panning ROM.

FIG. 5 is a diagram showing an example of front-back direction volume coefficients stored in a panning ROM.

FIG. 6 is an operation flowchart showing the operation of this embodiment.

FIG. 7 is an operation flowchart (No. 1) related to timer interrupt processing.

FIG. 8 is an operation flowchart (No. 2) related to timer interrupt processing.

[Explanation of symbols]

 101 CPU 102 ROM 103 RAM 104 Keyboard 105 Switch Group 106 Width Measuring Instrument 107 Sound Source 108 Panning Control Circuit 109 L Channel Amplifier 110 L Channel Speaker 111 R Channel Amplifier 112 R Channel Speaker 301, 303, 304 Multiplier 302 Panning ROM 305 Coefficient conversion circuit

Claims (2)

[Claims] 1. A sound image movement control device having a function of repeatedly moving a position of a sound image generated by an acoustic signal output from a sound generation device, which relates to a size and a space of a space in which the sound image movement control device is placed. Distance measuring means for measuring the distance between two or more sets of points, and the sound image along a trajectory corresponding to the size and shape of the space corresponding to the distance between the two sets of two points measured by the distance measuring means. Sound image movement data storage means for storing a plurality of sets of sound image movement data for repeatedly moving the position of the position, and the distance between the two points of the plurality of sets measured by the distance measurement means from the sound image movement data storage means. Sound image movement data reading means for reading the sound image movement data, and the sound along the trajectory based on the sound image movement data read by the sound image movement data reading means. The sound image control apparatus characterized by having a sound image moving means for moving repeatedly. 2. The sound image moving means includes a volume coefficient storage means for storing a volume coefficient that continuously changes according to an incremented address, and a volume coefficient reading means for reading the volume coefficient from the volume coefficient storage means. 2. The sound image movement control according to claim 1, further comprising: an acoustic signal amplitude control unit that controls the amplitude of the acoustic signal output using the volume coefficient read by the volume coefficient reading unit. apparatus.