JPH0795880B2 - Sound field configuration device - Google Patents

Description

DETAILED DESCRIPTION In recent years, in a passenger compartment of a passenger car, an incidental acoustic signal such as reverberation sound or early reflection sound is generated with respect to a stereo acoustic signal from an acoustic signal source such as a cassette tape recorder. A sound field configuration device that reproduces a sound field in a desired space at a listening position by adding and reproducing the sound field tends to be widespread. A plurality of kinds of spaces, which are the reference of the sound field, are set, such as a concert hall and a live house, and are selected by switching the sound field switching switch along the cycle. The listener adjusts a constant with respect to the selected reference sound field to construct a desired sound field. By the way, conventionally, in order to comparatively hear the adjusted sound field generated by the adjustment and the reference sound field which is the basis of the adjusted sound field, the sound field switching switch must be operated a plurality of times. However, the operation was very complicated. Therefore, in the present invention, in the operation of the sound field switching switch immediately after the generation of the adjusted sound field, the reference sound field which is the basis of the adjusted sound field is once returned. Therefore, the operation for comparative listening between the adjusted sound field and the reference sound field is significantly simplified, and the operability is improved.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound field forming device for forming a desired sound field in a passenger compartment of a passenger car, for example, and more particularly to a sound field switching operation according to an operation switch.

2. Description of the Related Art Sound reproducing devices installed in vehicles such as passenger cars include monaural reproducing devices that use amplitude modulated waves (AM waves) as a sound source, frequency modulated wave (FM wave) receivers, magnetic tape reproducing devices, or compact discs. A stereo playback device using a (CD) playback device as a sound source is widely used. At present, in the reproduction system arranged in the passenger compartment of a passenger car or the like, in addition to the above-described sound source, front left and right speakers are arranged in the front of the passenger compartment, and rear left and right speakers are arranged in the rear.

With such a speaker arrangement, left-channel stereo sound is reproduced from the front and rear left speakers, and right-channel stereo sound is reproduced from the front and rear right speakers. With such a reproduction method, the driver or passenger in the vehicle cabin is made to perceive the "realistic feeling" or "expansion feeling" peculiar to stereo sound.

Further, in recent years, for example, in order to perceive a unique sound field in a performance hall or the like, an additional acoustic signal such as a reverberation sound, an initial reflection sound, and a bass for 3D is generated from the stereo acoustic signal, which is a direct sound. It is output together with the stereo sound signal so that a more desired sound field can be constructed. The sound field is adjusted by adjusting reverberation time, initial delay time, and each level of the incidental acoustic signal (collectively referred to as “constant”).
For example, it can be set up in a space such as a concert hall, a live house, a church, and even a stadium.

A constant serving as a reference for each of these sound fields is stored in advance in memory as a constant corresponding to the reference sound field. Therefore, every time the sound field switching switch EFC is operated, as shown in FIG. 10 (1), the constants corresponding to the reference sound field are sequentially exchanged, and the acoustic signal read out and output in a so-called cycle is output. Therefore, the corresponding reference sound field is constructed. The listener can adjust each constant with respect to the read reference sound field, and the adjusted sound field thus adjusted is formed, and the acoustic signal is reproduced.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, according to the sound field switching switch EFC that has been conventionally considered, it is possible to switch along the cycle unconditionally to each of the reference sound fields successively following each operation as described above. It is configured.

For example, a listener may want to compare and listen to the adjusted sound field generated by adjusting the constants according to the reference sound field, and to consider the difference in the sound field. . However, since the reference sound field is switched unconditionally along the cycle as described above, after generating the adjusted sound field,
When the sound field switching switch EFC is operated, the sound field is switched to the reference sound field subsequent to the reference sound field to be comparatively heard. Therefore, unless the sound field switching switch EFC is operated a plurality of times, the reference sound field for comparative listening cannot be restored.

A line of the above problems will be shown with reference to FIG. The sound field switching switch EFC is operated, the reference sound field is used as a concert hall, the constant is adjusted by a predetermined time extension switch +, etc., and the adjusted sound field generated in this way is determined by the memory operation switch Sm1. , Stored in a predetermined memory. When the sound field switching switch EFC is operated to listen to the stored adjusted sound field in comparison with the reference sound field of the concert hall, the reference sound field of the following live house is set instead of the reference sound field of the concert hall. Will end up. Therefore, in order to set the reference sound field in the concert hall, the sound field switching switch EFC must be operated more than once (three times in this case). Therefore, the switch operation at the time of performing the comparison operation is complicated, and the listener may be erroneously recognized.

Therefore, an object of the present invention is to perform a comparative listening of a sound field which is a base by a simple operation and a sound field whose constant is changed from the sound field which is a base by an easy switch operation. An object is to provide a sound field configuration device that can do so.

Means for Solving the Problems According to the present invention, a constant for forming a plurality of types of sound fields is stored for each sound field, and a sound field is switched to read the stored contents of the first memory. A first operation switch operated for outputting, a sound field configuration calculation circuit for calculating and outputting an acoustic signal forming a sound field in response to a signal representing the constant, a second memory, and the sound field A third memory for storing a constant to be given to the configuration calculation circuit; a second operation switch operated to change the constant stored in the third memory; and a second operation switch responsive to an output of the second operation switch. A constant changing means for changing the constant stored in the third memory and storing the changed constant in the second memory; a third operation switch; and a second operation switch in response to an output of the third operation switch. Stored in memory Reading means for storing a signal representing a constant in the third memory and giving it to the sound field configuration arithmetic circuit; and in response to the output of the first operation switch, the second operation switch before the operation of the first operation switch. Operation switch and third
When none of the operation switches is operated, a signal representing the constant stored in the first memory is stored in the third memory and given to the sound field configuration calculation circuit.
When the second operation switch or the third operation switch is operated before the first operation switch operation, the constant of the sound field which is the basis of the constant switched in the third memory is read from the first memory, and And a discriminating means for storing in three memories and giving it to the sound field configuration calculation circuit.

Operation According to the present invention, when neither the second operation switch nor the third operation switch is operated before the operation of the first operation switch, the signal representing the constant stored in the first memory is Each time the first operation switch is operated, it is sequentially repeated for each sound field, stored in the third memory, and given to the sound field configuration calculation circuit. That is, the sound field is configured along the cycle for each operation of the first operation switch.

When the second operation switch or the third switch is operated before the operation of the first operation switch, the first operation switch is operated.
When the operation switch is operated, the constant for the sound field that is the basis of the already changed constant stored in the third memory is read from the first memory, and the signal representing the read constant is converted into the sound field. It is given to the configuration calculation circuit and the sound field is constructed. Therefore, from the adjusted sound field,
Since the sound field that is the basis of the adjusted sound field is configured only by operating the operation switch, comparative listening between the sound fields can be easily performed.

Embodiment FIG. 1 is a block diagram showing a simplified electrical structure of a sound field forming apparatus 1 which is an embodiment of the present invention. The configuration of the sound field configuration device 1 will be described with reference to FIG.

Cassette tape recorder, compact disc (CD),
Further, a stereo audio signal for the right channel and a stereo audio signal for the left channel are respectively output from an audio signal generation source 2 such as a digital audio tape recorder (DAT). Each stereo audio signal is individually converted to analog / digital converter 3a, 3b
Is converted into a digital signal via each of the above, and is input to a digital signal processor (hereinafter referred to as “DSP”) 4.

The DSP 4 is a sound field configuration calculation circuit that performs a calculation process such as multiplication and addition on the input stereo sound signal and outputs a sound signal for forming a sound field described later. That is, reverberant sound, early reflection sound, and additional sound signals such as bass for 3D are generated from the input stereo sound signal,
The stereo audio signal is added and output. A processing circuit 6 composed of, for example, a microcomputer is connected to the DSP 4, and a group of operation switches 7 and a display 8 composed of a liquid crystal display device are provided in association with the processing circuit 6. There is.

The processing circuit 6, based on the input operation from the operation switch group 7 described later, with respect to the incidental acoustic signal, the reverberation time,
The constant F including the initial delay time and each level of the incidental acoustic signal is adjusted and set. The acoustic signal to which the incidental acoustic signal thus adjusted is added,
A front left speaker FL, a front right speaker FR, a rear left speaker RL, and a rear right speaker RR, which are arranged in the vehicle compartment, are respectively provided via the corresponding digital / analog converters 5a to 5d.
Played from. For example, front left and right speakers FL, FR
It is provided near the left and right ends of the instrument panel where various instruments are placed, and on the left and right doors. The rear left and right speakers RL and RR are arranged on the rear tray. In this way, the acoustic signal from each speaker brings a sound image to the listening position in the vehicle interior, and a sound field having a "realistic feeling" or a "expansive feeling" is configured.

In the processing circuit 6, a read-on memory (hereinafter referred to as “ROM”) 9 that is a first memory and a random access memory (hereinafter referred to as “RAM”) 10 that is a second memory are provided. The ROM 9 has, for example, four store areas 9a-
The area is divided into 9d, and a constant F serving as a reference for a sound field formed in the selected space is individually stored in each area as a constant corresponding to the reference sound field T. The space is, for example, Cosart Hall, live house, church,
Furthermore, it is a stadium.

RAM10 is a constant F that corresponds to the sound field you want to confirm after adjustment.
A plurality of (four areas in this embodiment) sub memories m1 to m4 for storing data and sub memories M1 to M3 for storing peculiar information according to the sound field currently being reproduced. The sub memory M1 is an area for storing a memory number of a sub memory used for exchanging information with sub memories M2 and M3 described later. For convenience, the memory numbers are the same as the reference symbols m1 to m4 of the sub memory.

The sub memory M2 is an area where the constant F currently set in the DSP 4 is stored. Ie the memory
Based on the constant F stored in M2, an acoustic signal to which the incidental acoustic signal is added is generated and output from the speaker to form a sound field. Further, the sub memory M3 stores the mode counter value C determined corresponding to any reference sound field of the ROM 9 currently read. The mode counter value C corresponds to, for example, 1 to 4 in the order of concert hall, live house, church, and stadium stored in the ROM 9.

The contents stored in the sub memories m1 to m4 are shown in FIG. In FIG. 2, reference numerals m refer to the sub memories m1 to m4 as a whole.
Indicate. Each of the sub memories m1 to m4 is further divided into a plurality of store areas, and the constant F is stored in the first store area m01, for example. The mode count value C is stored in the second store area m02. Therefore, the first
The store area m01 transfers the store contents to and from the sub memory M2 by the operation of the operation switch described later.
In addition, the second store area m02 transfers data to and from the sub memory M3. In this way, information indicating which reference sound field T in the ROM 9 and how much is adjusted is stored in the sub memories m1 to m4.

The operation switch group 7 is grouped by function into a first operation switch S1 to a third operation switch S3. The sound field switching switch EFC, which is the first operation switch S1, is basically R
A constant F corresponding to the reference sound field T of OM9 is read into the sub memory M2. Furthermore, for each operation of the sound field switching switch EFC,
The reference sound field T to be read is switched along the cycle in the store order in the ROM 9. For example, in this embodiment, the concert hall, the live house, the church, the stadium, and the concert hall are sequentially switched for each operation.

The constant adjustment switch, which is the second operation switch S2, is divided into a time mode and a level mode. When adjusting the reverberation time and the initial delay time in the constant F, either one of the times is selected by operating the time selection switch TIME, and the time extension switch + and the time reduction switch- The selected time stored in memory M2 is adjusted. When adjusting the levels of the reverberation sound, the early reflection sound, and the bass for 3D, similarly, the level selection switch FUNCTION is operated to select the level to be adjusted, followed by the level increase switch UP and the level decrease. With the switch DOWN, the sub memory M2
The selected level stored in is adjusted. By the operation of these constant adjustment switches,
A sound field configured by adjusting the constant F is called an adjusted sound field Y.

When the adjusted sound field Y is confirmed and it is desired to save,
The memory operation switches Sm1 to Sm4, which are the operation switches S3, are operated. The memory operation switches Sm1 to Sm4 individually correspond to the sub memories m1 to m4. The memory operation switch
By operating any one of Sm1 to Sm4, any one of the sub memories m1 to m4 selected correspondingly and the sub memory M1 are selected.
Reads / writes the contents of store to / from M3. The read / write is selected, for example, according to the operation time of the memory operation switch, and when the pressing operation is less than 1.5 seconds, the corresponding stored contents are read from the corresponding sub memories to the sub memories M1 to M3. On the other hand, when the pressing operation is performed for 1.5 seconds or more, the stored contents are written from the sub memories M1 to M3 to the corresponding sub memories.

The processing state of the processing circuit 6 according to the operation of the operation switch group 7 is displayed on the display 8.

By the way, the time when the sound field switching switch EFCC is operated is the time when the reference sound field T is switched as described above, and the constant F corresponding to the reference sound field T is set by the constant adjustment switch and the memory operation switch. There is a case where the adjusted sound field Y generated by the adjustment is desired to be compared and heard with the reference sound field T which is the reference again. Even when the reference sound field T is switched, the listener does not always want to switch to the subsequent sound field by operating the sound field switching switch EFC.
There is a tendency to push the sound field switching switch EFC a plurality of times in order to select whether or not to select. Therefore, when the sound field switching switch EFC is operated after the adjusted sound field Y is generated, even if the sound field switching switch EFC is once returned to the reference sound field T which is the basis of the adjusted sound field Y, then the sound field switching switch EFC is moved to the cyclic position. Therefore, even if the reference sound field T is switched, it is considered that the listener does not feel uncomfortable and the operation of switching the reference sound field T is not complicated.

Therefore, in the present embodiment, which of the reference sound fields T is the sound field currently being reproduced from the stored state of the sub memories M1 to M3.
It is configured to determine whether or not the adjustment is made based on the above, and to select and set the reference sound field T for each operation of the sound field switching switch EFC according to the determination result. That is, if neither the constant adjustment switch nor the memory operation switch is operated, information indicating the currently reproduced reference sound field T is stored in the sub memories M2 and M3.
M1 is in a clear state because it is not using any sub memory. In the above state, the constant F corresponding to the reference sound field T is not adjusted, so the sound field switching switch EF
It can be determined that the operation of C is simply a request for switching the reference sound field T. Therefore, sound field switching switch EFC
With each operation, the constant F of the reference sound field T following the reference sound field indicated by the mode count value C of the sub memory M3 along the cycle is sequentially switched from the ROM 9 to the sub memory.
Read to M2. That is, the reference sound field T is switched.

On the other hand, when the constant adjustment switch or the memory operation switch is operated, the memory number used in the sub memory M1 is a constant corresponding to the adjusted sound field Y generated in the sub memory M2. Further, F is stored in the sub memory M3, and a mode counter value C indicating a reference sound field T which is a reference of the adjusted sound field Y is stored. Since the sound field is adjusted in the above state, it can be determined that the operation of the sound field switching switch EFC requires the comparison with the reference sound field T. Alternatively, it may be possible to make a determination. Therefore, when the sound field switching switch EFC is operated, first,
It returns to the reference sound field T which is the basis of the adjusted sound field Y. That is, the constant F corresponding to the reference sound field T indicated by the mode counter value C stored in the sub memory M3 at the time of operation is read from the ROM 9, the constant F is stored in the sub memory M2, and the sub memory M1 is cleared. . In this way, the comparative listening of the adjusted sound field Y and the reference sound field T can be realized by a single operation of the sound field switching switch EFC. Subsequent sound field switching switch EFC
In the operation of, the above-mentioned stored states of the sub memories M1 to M3 are switched to the subsequent reference sound field T along the cycle again.

Further, by temporarily storing the information indicating the adjusted sound field Y in the sub memories m1 to m4, the sound field switching switch EFC and the memory operation switch corresponding to the sub memory storing the adjusted sound field Y are alternately switched. It is also possible to carry out comparative listening multiple times by operating. Therefore, in order to compare and listen to the adjusted sound field Y and the reference sound field T as described above, it can be realized by a much simplified switch operation, rather than a complicated switch operation as in the past.

The processing corresponding to each operation switch will be described below with reference to the flow chart.

FIG. 3 is a flow chart for explaining the discrimination operation of the input operation from the operation switch group 7 in the processing circuit 6. In the processing circuit 6, in step a1, for example,
Initialization processing such as clearing the contents stored in the RAM is performed, and the input state of the operation switch is determined in accordance with the sampling cycle determined in advance by determining the timer overflow in step a2. When the timer overflow has elapsed, it is determined whether or not one of the operation switches has been operated in steps a3 and a4.

If none of the operation switches is operated, the process proceeds to step a5, and the processing state of the processing circuit 6 at that time is displayed on the display unit 8. On the other hand, the step
In a4, if it is determined that one of the operation switches has been operated, the process proceeds to step a6, the process corresponding to each operation switch described later is performed, and the output corresponding to the process state is performed in step a5, and the process is performed. Returns to step a2, the above-mentioned processing is repeated, and the input of the operation switch is judged again.

FIG. 4 shows the sound field switching process based on the operation of the sound field selection switch EFC of this embodiment. When it is determined in the input determination of the operation switch that the sound field switching switch EFC is operated, the process proceeds according to the program shown in FIG.

When the sound field switching switch EFC is operated, it is determined in step b1 whether the memory number is "0", that is, whether the sub memory M1 is in the clear state. If the sub memory M1 is in the clear state, the adjusted sound field Y is not generated, so the mode counter value C stored in the sub memory M3 is incremented by +1 at step b2, and the mode counter value at step b3. It is determined whether or not the value C is "5". If the mode counter value C is "1" to "4", the process proceeds to step b5, while
If it is "5", it is returned to "1" at step b4, and the process proceeds to step b5.

In steps b5 to b11, the ROM is read according to the mode counter value C.
The constant F of the corresponding reference sound field T is read from 9 into the sub memory M2, and the sound field construction device 1 forms a sound field based on the constant F. That is, when the mode counter value C is "1", the reference sound field T of the concert hall is formed, when the mode counter value C is "2", the reference sound field T of the live house is formed, and the mode counter value C is "3". , The church reference sound field T is formed, and when the mode counter value C is “4”, the stadium reference sound field T is formed. In this way, when the sub memory M1 is in the clear state, the constant F corresponding to the reference sound field that follows along the cycle is read every time the sound field switching switch EFC is operated, and the reference sound field T is constructed based on the constant F. It

On the other hand, when the memory number is stored in the sub memory M1 at the step b1, the process proceeds from the step b1 to the step b12, the memory number is cleared, and the process proceeds to the step b5. When the memory number is stored in the sub memory M1, the constructed sound field is the adjusted sound field Y. Therefore, according to the processing route,
The reference sound field in the ROM 9 is stepped without incrementing the mode counter value C stored in the sub memory M3.
Since the selection is made from b5 to step b11, the constant F indicating the reference sound field serving as the reference of the adjusted sound field is read into the sub memory M2, and the reference sound field T is constructed based on the constant F. Become. That is, by operating the sound field switching switch after the adjusted sound field is generated, the reference sound field serving as the reference of the adjusted sound field is restored, and comparison listening between the adjusted sound field and the reference sound field is easy. Can be done.

FIG. 5 shows the registration processing based on the operation of the memory operation switches Sm1 to Sm4. Here, it is assumed that the memory operation switch Sm1 is operated. The memory operation switch Sm is determined by the input judgment of the operation switch shown in FIG.
When the input operation of 1 is determined, it is determined in step e1 of FIG. 5 whether or not the input operation of the memory operation switch Sm1 is the first time. If the judgment is affirmative, the process proceeds to step e2 to activate a clock counter for clocking, for example, 1.5 seconds, and then again proceeds according to the program shown in FIG.

After that, when the input operation of the memory operation switch Sm1 is determined again, the process proceeds from step e1 to step e3, and it is determined whether or not the time measurement for 1.5 seconds is completed. If the determination is negative, the process repeats the program of FIG. 3, step e1, and then step e3,
When the time counting for the second is completed, the memory operation switch Sm1
Is determined to have been operated for 1.5 seconds or more, and a constant F such as reverberation time is transferred from the sub memory M2 to the sub memory m1 at step e4. Further, at step e5, the mode counter value C
From the sub memory M3 to the sub memory m1.
At e6, the memory number m1 is set in the sub memory M1, and this registration process ends.

Further, FIG. 6 shows a reading process based on the operation of the memory operation switch Sm1. When the input operation of the memory operation switch Sm1 is completed while the program of FIG. 3 and steps e1 and e3 of FIG. 5 are repeated, the time measured by the clock counter is 1.5 seconds at step g1 of FIG. It is judged to be less than. Therefore, the memory operation switch Sm1 determines that the input operation is performed within 1.5 seconds, and at step g2, the constant F such as the reverberation time is read from the sub memory m1 to the sub memory M2, and the constant F is sent to the DSP4. Transfer and configure the adjusted sound field Y,
Further, at step g3, the mode counter value C is transferred to the sub memory m1.
To the sub memory M3, the memory number m1 corresponding to the memory operation switch Sm1 is set in the sub memory M1 in step g4, and the reading process is completed. The processing operation for the memory operation switch Sm1 in FIGS. 5 and 6 described above is similarly executed in the other memory operation switches Sm2 to Sm4.

7 and 8 show the processing operation for the operation of the constant adjustment switch. The constant F is adjusted by operating the selecting operation switch for selecting the time or level as described above, and then operating the adjusting operation switch.

FIG. 7 shows the time selection processing when the time selection switch TIME is operated. Either the reverberation time or the initial delay time is selected by the time selection switch TIME. When the time selection switch TIME is operated, it is determined whether or not the currently selected time is the reverberation time based on the reverberation flag previously set in step h1. If the reverberation flag is in the set state, it means that the reverberation time has been selected.
At, the reverberation flag is reset and the initial delay time is selected. On the other hand, if the reverberation flag is in the reset state at step h1, the process proceeds to step h3, in contrast, the reverberation flag is set to the set state, and the reverberation time is selected. The selection status between the selected reverberation axes and the initial delay time is displayed on the display unit 8.

FIG. 8 shows a time extension process based on the operation of the time extension switch +. When the input operation of the time extension switch + is determined by the determination of the input operation, step i1
Then, it is determined whether or not the time selected by the above-mentioned interval selection switch TIME is the reverberation time. If the determination is positive based on the reverberation flag or the like, the process proceeds to step i2 to set the reverberation time one step larger.

When it is determined that the time selected in step i1 is the initial delay time, the process proceeds to step i3 to set the initial delay time one step larger. In this way, the time constant selected by the operation of the time extension switch + is increased by one step. Although FIG. 8 has been described in relation to the time extension processing in response to the time extension switch +, the same processing operation is performed for the time reduction switch-and one step is performed for the selected time. It will be set small.

Further, although the above description has been made in relation to the constant adjustment switch in the time mode, also in the level mode, the level selection switch FUNCTION and the level increase switch are also provided.
For UP, and further for level drop switch DOWN, the reverberation sound is constructed in the same manner as the processing operation shown in FIGS. 7 and 8.
Adjust the level up / down of the selected sound, either early reflections or bass for 3D.

FIG. 9 is a diagram showing the relationship between the sound field switching switch EFC and the sound field to be switched in this embodiment. FIG. 9 shows an input operation in the same order as the operation switch in FIG. 10 (2) shown in the prior art. The first sound field switching switch EFC operation sets the reference sound field in the concert hall, and the time extension switch + etc. generates an adjusted sound field, and the memory operation switch Sm1 operates for more than 1.5 seconds. Then, the constant F corresponding to the adjusted sound field is stored in the sub memory m1. According to the present embodiment, when the sound field switching switch EFC is subsequently operated, the sound field switching switch EFC is returned to the reference sound field of the concert hall, which is the reference of the adjusted sound field, again according to the above-mentioned determination in the sub memories M1 to M3. Each time the sound field switching switch EFC is operated, the reference sound field is switched along the cycle. Therefore, the comparative listening between the adjusted sound field and the reference sound field is executed by only one operation of the sound field switching switch EFC, which greatly simplifies the operation and shows the conventional relationship. As shown in FIG. 10 (2), it is possible to avoid a complicated operation that cannot be heard by comparison unless the sound field switching switch EFC is operated multiple times.

In the above-described embodiment, the memory operation switches Sm1 to Sm4.
Is provided, and data is read / written between the sub memories by the operation of the memory operation switch. As another embodiment, the sound field switching switch is generated after the adjustment sound field is generated by, for example, operating a constant adjustment switch without providing the memory operation switch.
When the EFC is operated, the adjustment sound field may be restored to the reference sound field serving as the reference of the adjustment sound field, and the adjustment sound field may be automatically stored in the sub memory. The constant corresponding to the adjusted sound field stored in the sub memory is read by, for example, a read-only button.
According to the above-mentioned embodiment, the read-only button serves as the third operation switch.

Therefore, according to the above-described embodiment, the reference sound field and the adjusted sound field adjusted from the reference sound field can be comparatively heard by an easy operation, which is excellent in operability.

In the present embodiment, the types of operation switches, the number of sub memories, the types of reference sound fields, the types of constants, and the like that constitute the sound field configuration device are not limited.

EFFECTS OF THE INVENTION According to the present invention, the sound field stored in the first memory and the sound field generated by changing the constant for the sound field can be compared and heard by the operation of the easy operation switch. And the operability is greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a simplified electrical configuration of a sound field configuration device 1 which is an embodiment of the present invention, FIG. 2 is a diagram showing the contents stored in a sub memory m, and FIG. 3 is a processing circuit 6 4 is a flow chart for explaining the discrimination processing of the input operation from the operation switch group 7 in FIG. 4, and FIG. 4 is a flow chart for explaining the sound field switching processing based on the operation of the sound field switching switch EFC of this embodiment. 5 is a flow chart for explaining a registration process based on the operation of the memory operation switch Sm1, FIG. 6 is a flow chart for explaining a read process based on the operation of the memory operation switch Sm1, and FIG. 7 is a time selection switch. A flow chart for explaining the time selection process based on the operation of TIME, Fig. 8 shows a time extension switch +
FIG. 9 is a flow chart for explaining the time extension process based on the operation of FIG. 9, FIG. 9 is a diagram showing the relationship between the sound field switching switch and the sound field to be switched in this embodiment, and FIG. It is a figure which shows the relationship with the reference sound field. 1 ... Sound field configuration device, 4 ... Digital signal processor (DSP), 6 ... Processing circuit, 9 ... Read only memory (ROM), 10 ... Random access memory (RAM), F
…… Constant, C …… Mode counter value, EFC …… Sound field switching switch, TIME …… Time selection switch, + …… Time extension switch, − …… Time reduction switch, FUNCTION …… Level selection switch, UP …… Level up switch, DOWN ……
Level drop switch, Sm1 to Sm4 …… Memory operation switch, T …… reference sound field, Y …… adjusted sound field

Claims (1)

[Claims] 1. Constants for constructing a plurality of types of sound fields,
A first memory to store for each sound field, a first operation switch operated to switch the sound field and read the stored contents of the first memory, and a sound field in response to a signal representing the constant. A sound field configuration calculation circuit that calculates and outputs a constituent acoustic signal, a second memory, a third memory that stores a constant given to the sound field configuration calculation circuit, and the constant stored in the third memory And a second operation switch operated to change the constant, and a constant stored in the third memory is changed in response to an output of the second operation switch, and the changed constant is stored in the second memory. A constant changing means, a third operation switch, and a signal representing the constant stored in the second memory in response to the output of the third operation switch and stored in the third memory to generate the sound field configuration calculation circuit. Give to Means out, the first in response to the output of the operation switch, wherein the operation to the previous first operation switch the second operation switch, and the third
When none of the operation switches is operated, a signal representing the constant stored in the first memory is stored in the third memory and given to the sound field configuration calculation circuit.
When the second operation switch or the third operation switch is operated before the first operation switch operation, the constant of the sound field which is the basis of the constant switched in the third memory is read from the first memory, and 3. A sound field configuration device comprising: a discriminating means for storing in 3 memories and giving it to the sound field configuration calculation circuit.