JP2009086481A - Sound device, reverberations-adding method, reverberations-adding program, and recording medium thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To add sufficient reverberations so as to gain a sensation of ample extent of sound. <P>SOLUTION: A reverberations-generating part 210<SB>j</SB>(j=L, R) generates reverberation signals PRD<SB>j</SB>, on the basis of channel processing signals PCD<SB>j</SB>. Then, a compressor part 221<SB>j</SB>executes compression processing on the reverberation signals PRD<SB>j</SB>, according to compression control instructions CMC<SB>j</SB>, which designate periodically changing compression and parameters (thresholds, effect quantities, attack time and release time). The signals subsequent to the compressing processing are combined with the channel-processing signals PCD<SB>j</SB>in an adder 230, after minor corrections are made in a sound-correcting part 222<SB>j</SB>. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an acoustic device, a reverberation sound addition method, a reverberation sound addition program, and a recording medium on which the reverberation sound addition program is recorded.

  Conventionally, audio apparatuses that reproduce music and the like have been widely used. Such an acoustic device is generally installed in a general house or vehicle and is used by a user. The technology relating to such an acoustic device has been remarkably developed, and a technology that simulates even early reflections and reverberation (hereinafter collectively referred to as “reverberation”) generated in a concert hall or the like has been proposed (patented) Reference 1 etc .: hereinafter referred to as “conventional example”).

  In such a conventional technique, a reverberation sound signal whose amplitude level and delay time regularly change is generated based on the main sound signal, and is added to the main sound signal. According to the conventional technique, by changing the multiplication factor of the multiplier that generates the reverberation sound from the main sound signal according to the level of the main sound signal, the sound description when the level of the main sound signal is high is obtained. In addition to preventing the deterioration of the degree, the sound field feeling in the large hall can be secured even when the level of the main sound signal is low.

No. 8-2720

  In the conventional technique, a reverberation sound is generated by regularly changing the amplitude level and the delay time based on the main sound signal. For this reason, there is a tendency that the reverberant sound is monotonous and the sound spread is not sufficient.

  For this reason, there is a need for a reverberant sound adding technology that can be closer to the sound field feeling in an actual concert hall and the like and can realize a sufficient sound spread feeling regardless of the sound source. Meeting this requirement is one of the problems to be solved by the present invention.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an acoustic device and a reverberation sound adding method capable of performing appropriate reverberation sound addition.

  The invention according to claim 1 is a reverberation sound generating means for generating a reverberation sound signal based on an acoustic signal; a processing control means for issuing a processing command for controlling processing on the reverberation sound signal; and the processing control means. The sound comprises: reverberation sound processing means for processing the reverberation sound signal in accordance with the processing command from; and synthesis means for combining the processing result of the reverberation sound processing means and the acoustic signal. Device.

  The invention according to claim 13 is a reverberation sound generation step for generating a reverberation sound signal based on an acoustic signal; a processing control step for issuing a processing command for controlling processing on the reverberation sound signal; and the processing control step. A reverberation sound processing step for processing the reverberation sound signal in accordance with the processing command by; and a synthesis step for combining the processing result of the reverberation sound processing step and the acoustic signal. It is an addition method.

  A fourteenth aspect of the present invention is a reverberant sound adding program that causes a calculation means to execute the reverberant sound adding method according to the thirteenth aspect.

  A fifteenth aspect of the present invention is a recording medium on which the reverberation sound adding program according to the fourteenth aspect is recorded so as to be readable by the calculation means.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the following description and drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

[Constitution]
FIG. 1 is a block diagram illustrating a schematic configuration of an audio device 100 according to an embodiment.

As shown in FIG. 1, the acoustic device 100 includes a control unit 110 and a drive unit 120. The acoustic device 100 includes a sound output unit 130 _L, and 130 _R.

Here, the sound output unit 130 _L has a left speaker 131 _L , and the sound output unit 130 _R has a right speaker 131 _R.

  Furthermore, the acoustic device 100 includes a display unit 140 and an operation input unit 150.

  Elements 120 to 150 other than the control unit 110 are connected to the control unit 110.

  The control unit 110 performs overall control of the audio device 100. Details of the control unit 110 will be described later.

  When the compact disc CD on which the audio content is recorded is inserted into the drive unit 120, the drive unit 120 reports that fact to the control unit 110. When the drive unit 120 receives the audio content reproduction command DVC from the control unit 110 in a state where the compact disc CD is inserted, the drive unit 120 reads the audio designated for reproduction from the compact disc CD. The result of reading out the audio content is sent to the control unit 110 as content data CTD that is an audio signal.

The sound output unit 130 _j (j = L, R), in addition to the speaker 131 _j described above, (i) DA that converts the audio output signal AOD _j that carries the left channel audio received from the control unit 110 into an analog signal. A converter (Digital to Analog Converter); and (ii) an amplifier that amplifies an analog signal output from the DA converter. Each of these sound output units 130 _j reproduces and outputs music and the like under the control of the control unit 110.

  The display unit 140 displays (i) a display device such as a liquid crystal display panel, an organic EL (Electro Luminescence) panel, and a PDP (Plasma Display Panel), and (ii) display control data sent from the control unit 110. A display controller such as a graphic renderer for controlling the entire unit 140 and (iii) a display image memory for storing display image data are included. The display unit 140 displays operation guidance information and the like under the control of the control unit 110.

  The operation input unit 150 includes a key unit provided in the main body of the audio device 100, or a remote input device including the key unit. Here, as a key part provided in the main body part, a touch panel provided in a display device of the display unit 140 can be used. In addition, it can replace with the structure which has a key part, and the structure which inputs voice can also be employ | adopted.

  When the user operates the operation input unit 150, the operation content of the acoustic device 100 is set. For example, the user uses the operation input unit 150 to specify an audio content reproduction command, a processing command to be sent to a reverberation sound processing unit, which will be described later, and the like. Such input contents are sent from the operation input unit 150 to the control unit 110 as operation input data IPD.

  As described above, the control unit 110 performs overall control of the audio device 100. As shown in FIG. 2, the control unit 110 includes a control processing unit 111 as processing control means and an audio processing unit 112. The control unit 110 includes a reverberation sound adding unit 113.

  The control processing unit 111 controls the audio processing unit 112 and the reverberation sound adding unit 113 based on the command input input to the operation input unit 150. In addition, the control processing unit 111 controls the drive unit 120 and the display unit 140. Details of the control processing unit 111 will be described later.

The audio processing unit 112 automatically reproduces content when the operation input unit 150 reports that the content to be reproduced including audio content has been input and when the compact disc CD is inserted into the drive unit 120. When the setting to be performed is made, the content data CTD corresponding to the content to be reproduced is read out from the drive unit 120 and expanded according to the audio content processing control command APC issued from the control processing unit 111, and the digital sound Generate a data signal. Subsequently, the audio processing unit 112 analyzes the generated digital sound data signal and supplies the digital sound data signal to each of the sound output units 130 _L and 130 _R according to the channel designation information included in the digital sound data signal. Separate as supplied. The signals thus separated are output to the reverberation sound adding unit 113 as channel processing signals PCD _L and PCD _R.

The reverberation sound adding unit 113 adds a reverberation sound to the channel processing signals (acoustic signals) PCD _L and PCD _R sent from the audio processing unit 112. The reverberation adding section 113, channel processing signals PCD and the individual reverberation adding section 114 _L for performing reverberation added to _L, the channel processed signal PCD individual reverberation adding section 114 performs the reverberation added to _{R R} And.

As shown in FIG. 3, the individual reverberation sound adding unit 114 _j (j = L, R) includes a reverberation sound generating unit 210 _j as reverberation sound generating means and a reverberation sound processing unit 220 _j as reverberation sound processing means. And. The individual reverberation adding unit 114 _j includes an adder 230 as a synthesizing unit.

Reverberation generator unit _{210 j (j = L, R} ) is subjected to channel processing signals PCD _L from the audio processing unit 112. The reverberation generator unit 210 _j, based on the channel processing signals PCD _j, for example in the same way as in the conventional example described above, to generate the reverberation signal PRD _j. The reverberation sound signal PRD _j generated in this way is output toward the reverberation sound processing unit 220 _j .

The reverberation sound processing unit 220 _j (j = L, R) performs compression processing and sound correction processing on the reverberation sound signal PRD _j . The reverberation sound processing unit 220 _j includes a compressor unit 221 _j as a compressing unit and an acoustic correction unit 222 _j as an acoustic correcting unit.

Compressor unit _{221 j (j = L, R} ) compresses the level variation range of the reverberation sound signal PRD _j, and outputs toward the acoustic correction unit 222 _j The圧宿resulting reverberation compress signal PPD _j. The compression process performed by the compressor unit 221 _j of the present embodiment is performed by setting the threshold value TH _j , the effect amount EF _j , the attack time AT _j , and the release time RE _j as compression parameters. The relationship between a certain reverberant sound signal PRD _j and the reverberant compressed signal PPD _j that is an output signal is, for example, a characteristic as shown in FIG. 4 (hereinafter, this characteristic is also referred to as “input / output characteristic”).

In the input / output characteristics shown in FIG. 4, the processing content of the compression process corresponding to the level of the reverberation signal PRD _j is changed with the threshold TH _j as a boundary. When the level of the reverberation sound signal PRD _j is equal to or smaller than the threshold TH _j is effective amount EF _j is increased uniformly to the level of the reverberation sound signal PRD _j.

The attack time AT _j is a change time to the result value of the compression process when the level of the reverberation sound signal PRD _j increases. The release time RE _j is a change time to the result value of the compression process when the level of the reverberation sound signal PRD _j decreases.

The parameter values of these compression parameters are specified by a compression control command CMC _j , which will be described later, which is a part of the machining command from the control processing unit 111. In the present embodiment, each of the above-described compression parameter values is periodically changed from the compression control command CMC _j . In FIG. 5A, the input / output characteristics when the threshold is specified as TH1 _j are indicated by solid lines, and the input / output characteristics when the threshold is specified as TH2 _j are indicated by two-dot chain lines. When the threshold value is periodically changed between TH1 _{j and} TH2 _{j by} a compression control command CMC _j (more specifically, a threshold designation THC _{j to be} described later), the input / output characteristics are shown in FIG. It changes periodically in the specified range.

In FIG. 5B, the input / output characteristics when the effect amount is designated as EF1 _j are indicated by solid lines, and the input / output characteristics when the effect amount is designated as TH2 _j are indicated by two-dot chain lines. Has been. When the effect amount is periodically changed between EF1 _{j and} EF2 _{j by} a compress control command CMC _j (more specifically, an effect amount designation EFC _j described later), the input / output characteristics are as shown in FIG. It changes periodically in the range shown in.

As shown in FIG. 6, the compressor unit 221 _j includes a level detection unit 241 _j , a coefficient calculation unit 242 _j, and a coefficient multiplier 243.

The level detection unit 241 _j (j = L, R) receives the reverberation sound signal PRD _j from the reverberation sound generation unit 210 _j . Then, the level detector 241 _j performs absolute value processing on the reverberation sound signal PRD _j, detects the signal level of the reverberant sound signal PRD _j based on the processing results. The detection result is sent to the coefficient calculation unit 242 _j as a signal LVD _j .

The coefficient calculation unit 242 _j (j = L, R) calculates a coefficient MC _{j by} which the reverberation sound signal PRD _{j is} multiplied. The coefficient determination unit 242 _j receives the signal LVD _j from the level detection unit 241 _j and also receives the compression control command CMC _j from the control processing unit 111. Here, Con the press control command CMC _j, the threshold value TH the threshold specified THC _j that specifies _j, effect size EF _j designation effectively amount specified EFC _j, attack time designated ATC _j specifying the attack time AT _j, release A release time REC _j specifying the time RE _j is included.

Coefficient calculating unit 242 _j, the signal LVD _j determines whether the threshold value TH _j greater than or equal to the threshold specified THC _j specifies. Further, the coefficient calculation unit 242 _j determines in which direction the level of the reverberation signal PRD _j is increased or decreased from the signal LVD _j . Then, the coefficient calculation unit 242 _j applies the compression parameter specified by the compression control command CMC _j based on these determination results, and sets the coefficient MC _j so that the output characteristic shown in FIG. 4 is obtained. calculate. The coefficient MC _j calculated in this way is sent from the coefficient calculation unit 242 _j to the coefficient multiplication unit 243.

The coefficient multiplier 243 receives the reverberation signal PRD _j from the reverberation generator 210 _j and the coefficient MC _j from the coefficient calculator 242 _j . Then, the coefficient multiplier 243 multiplies the reverberant sound signal PRD _j by the coefficient MC _j . The multiplication result is output to the acoustic correction unit 222 _j as the reverberation compressed signal PPD _j .

Returning to FIG. 3, the acoustic correction unit 222 _j (j = L, R) receives the reverberation compressed signal PPD _j from the compressor unit 221 _j . The acoustic correction unit 222 _j includes an equalizer circuit (not shown), a filter circuit, and the like. In this configuration, the equalizer circuit, the filter circuit, and the like perform acoustic correction on the reverberation compressed signal PPD _{j in} accordance with the correction command ACC from the control processing unit 111. The correction result is output to the adder 230 as a reverberation sound correction signal PED _j .

The adder 230 receives the channel processing signal PCD _j from the audio processing unit 112 and the reverberation sound correction signal PED _j from the reverberation sound processing unit 220 _j . The adder 230 adds these signals and outputs the addition result to the sound output unit 130 _j as the audio output signal AOD _j .

  Returning to FIG. 2, the control processing unit 111 exerts the function of the acoustic device 100 while controlling the other components described above. As shown in FIG. 7, the control processing unit 111 includes a compression control command issuing unit 251 and a control unit 256.

Compressor control command issuing unit 251 generates the compressed control command CMC _j in accordance with an instruction CPC from the control unit 256, issues toward the compressed control command CMC _j to the compressor unit 221 _j. Here, the compression control command CMC _j includes a threshold value specification THC _j , an effect amount specification EFC _j , an attack time specification ATC _j , and a release time REC _j . The compressor control command issuing unit 251 includes a threshold value specifying unit 252, an effect amount specifying unit 253, an attack time specifying unit 254, and a release time specifying unit 255.

Each of the threshold value specifying unit 252 and the effect amount specifying unit 253 analyzes the command CPC, and generates a threshold value specifying THC _j specifying the threshold value TH _j and an effect amount specifying EFC _j specifying the effect amount EF _j . Further, each of the attack time specifying unit 254 and the release time specifying unit 255 analyzes the command CPC, and uses the attack time specification ATC _j specifying the attack time AT _j and the release time specification REC _j specifying the release time RE _j. Generate.

The control unit 256 analyzes the operation input data IPD received from the operation input unit 150 and performs reverberation sound processing operation control such as compression processing and sound correction on the reverberation sound signal PRD _j in the reverberation sound adding unit 113. Do.

  When controlling the operation of the compression process, the control unit 256 analyzes the operation input data IPD, and gives a command CPC including a compression parameter value specification, a cycle specification related to the above-described cycle change, and a change width specification. This is sent to the compression control command issuing unit 251.

In addition, the control unit 256 analyzes the operation input data IPD and controls a correction command ACC _i including a boost amount and a cut amount set in the equalizer circuit and a cut-off frequency set in the filter circuit when controlling the operation of the acoustic correction. And sent to the acoustic correction unit 222 _j .

  In addition, the control unit 256 causes the display unit 140 to display a guidance screen for assisting the user in specifying audio content to be reproduced. When a reproduction command designating audio content is input from the operation input unit 150, the control unit 256 controls the drive unit 120 to control data reading of the reproduction content.

The control unit 256 also controls the audio processing unit 112 to separate the content data CTD into two channel processing signals PCD _L and PCD _R.

[Operation]
Next, the operation of the acoustic device 100 configured as described above will be described mainly focusing on the operation of the reverberation sound signal processing in the reverberation sound adding unit 113.

When the user inputs a reproduction command designating audio content to the operation input unit 150, the reverberation signal processing operation in the acoustic device 100 starts. Upon receiving the reproduction command from the operation input unit 150, the control processing unit 111 controls the drive unit 120 to read out the audio content data. The data thus read out is sent to the audio processing unit 112 as content data CTD. The audio processing unit 112 that has received the content data CTD separates the content data CTD into two channel processing signals PCD _L and PCD _R under the control of the control processing unit 111.

The channel processing signals PCD _L and PCD _R thus separated are sent to the reverberation sound adding unit 113. Here, the channel processed signal PCD _L is sent towards the individual reverberation adding section 114 _L of reverberation adding section 113, the channel processing signals PCD _R toward the individual reverberation adding section 114 _R of the reverberation adding unit 113 Sent (see FIG. 2).

In the individual reverberation sound adding unit 114 _j (j = L, R), the channel processing signal PCD _j is sent to the reverberation sound generation unit 210 _j and to the adder 230 (see FIG. 3).

First, the reverberation sound generating unit 210 _j which has received the channel processed signal PCD _j, based on a channel processing signals PCD _j, generates a reverberant sound signal PRD _j. The reverberation signal PRD _j generated in this way is sent to the level detector 241 of the compressor unit 221 _j and also sent to the coefficient multiplier 243 (see FIG. 6).

Then, level detector 241 _j which receives the reverberation sound signal PRD _j performs absolute value processing on the reverberation sound signal PRD _j, detects the signal level of the reverberant sound signal PRD _j based on the processing results. The detection result is sent to the coefficient calculation unit 242 _j as a signal LVD _j .

Coefficient calculating unit 242 _j includes with receiving a signal LVD _j from the level detection unit 241 _j, the threshold specified THC _j from the control processor 111, effect size specified EFC _j, attack time specified ATC _j, the release time REC _j receiving the compressed control command CMC _j. The coefficient calculating unit 242 _j, the signal LVD _j is determined to or greater than the threshold value TH _j, also determine the level of the reverberation sound signals PRD _j from signal LVD _j is either direction increases or decreases To do. Then, the coefficient calculation unit 242 _j applies the compression parameter specified by the compression control command CMC _j based on these determination results, and the coefficient so as to obtain the input / output characteristics shown in FIG. 4 described above. MC _j is calculated. The calculated coefficient MC _j is sent from the coefficient calculation unit 242 _j to the coefficient multiplication unit 243.

In the present embodiment, the compression parameters of the threshold value TH _j , the effect amount EF _j , the attack time AT _j , and the release time RE _j are independently determined according to the compression control command CMC _j from the control processing unit 111. It changes periodically. The period and change width of each parameter give the listener a sense of spread and are determined in advance based on experiments, simulations, experiences, and the like.

Subsequently, the coefficient multiplying unit 243, with receiving a reverberation sound signal PRD _j from reverberation generator unit 210 _j, receiving the coefficients MC _j from the coefficient calculation unit 242 _j. Then, the coefficient multiplier 243 multiplies the reverberant signal PRD _j by the coefficient MC _j and outputs it as the reverberation compressed signal PPD _j to the acoustic corrector 222 _j .

The acoustic correction unit 222 _j performs equalizing and filtering acoustic correction processing on the reverberation compressed signal PPD _{j in} accordance with the correction command ACC _j from the control processing unit 111. Note that the acoustic correction processing performed in the present embodiment is limited to minute correction. The reverberation compressed signal PPD _{j that} has been finely corrected in this way is output to the adder 230 as a reverberation sound correction signal PED _j .

Subsequently, the adder 230 receives the channel processing signal PCD _j from the audio processing unit 112 and the reverberation sound correction signal PED _j from the acoustic correction unit 222 _j . The adder 230 adds these signals and adds the reverberation sound correction signal PED _j to the channel processing signal PCD _j .

The signals subjected to the reverberation processing in the reverberation adding unit 113 in this way are sent to the sound output units 130 _L and 130 _R as audio output signals AOD _L and AOD _R (see FIG. 2). The reproduction sound based on the processing result from the speaker 131 _L, 131 _R, is outputted to the sound field space.

As described above, in the present embodiment, the compression process is performed to compress the level change range of the reverberation signal PRD _j (j = L, R) using the input / output characteristics shown in FIG. For this reason, even if the signal level and amount of the reverberation sound signal PRD _j vary from time to time for each content, the difference in feeling of spread can be reduced.

In addition, the compressing process performed in the present embodiment increases the signal level by uniformly applying the effect amount EF _j to the reverberant sound signal PRD _j of a minute level. For this reason, a feeling of expanse and a sound field feeling can be improved.

In the present embodiment, when the reverberation signal PRD _j is compressed, the threshold value TH _j is periodically changed to give fluctuation. For this reason, a new reverberation sound effect can be created and a feeling of spread can be controlled.

Further, in the present embodiment, when the reverberation signal PRD _j is compressed, the effect amount EF _j is periodically changed to give fluctuation. For this reason, a new reverberation sound effect can be created and a feeling of spread can be controlled.

In the present embodiment, the attack time AT _j is periodically changed when the reverberation signal PRD _j is compressed. For this reason, a new reverberation sound effect can be created and a feeling of spread can be controlled.

In the present embodiment, when the reverberation signal PRD _j is compressed, the release time RE _j is periodically changed to give fluctuation. For this reason, a new reverberation sound effect can be created and a feeling of spread can be controlled.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and various modifications are possible.

  For example, in the above embodiment, two speakers are provided. However, sound output may be performed from one speaker, and sound output may be performed from three or more speakers. .

Further, in the above-described embodiment, the threshold value TH _j , the effect amount EF _j , and the attack time AT _{j are} used as compression parameters that are periodically changed when the reverberation signal PRD _j (j = L, R) is compressed. Although the release time RE _j is used, any combination of compression parameters for changing the period may be used.

  In the above-described embodiment, the period and the change width of each compression parameter to be changed periodically are determined in advance. However, the user can specify the period by inputting from the operation input unit 150. .

  In the above embodiment, each compression parameter is changed at a constant cycle. However, the compression parameter may be changed after this cycle is changed randomly.

In the above embodiment, the acoustic correction unit 222 _j includes an equalizer circuit and a filter circuit. On the other hand, the acoustic correction unit 222 _j may have a configuration including a loudness circuit, a tone control circuit, or the like, or a combination of a plurality of circuits such as an equalizer circuit, a filter circuit, a loudness circuit, and a tone control circuit. It may be a configuration.

In the above embodiment, the reverberation sound processing unit 220 _j includes the acoustic correction unit 222 _j . However, the acoustic correction unit 222 _j may be omitted.

In the above embodiment, the input / output characteristics of the signal in the compression process are as shown in FIG. On the other hand, for example, the compression process may be performed on the reverberant sound signal PRD _{j based on} the input / output characteristics of the signal shown in FIG.

  In addition, a part or all of the control unit 110 in the above-described embodiment includes a central processing unit (CPU), a DSP (Digital Signal Processor), a read only memory (ROM), a random access memory (RAM). : Random Access Memory) or the like, and configured as a computer, and a part of or all of the processing in the above embodiment is executed by executing a program prepared in advance on the computer. Good. This program is recorded on a computer-readable recording medium such as a hard disk, CD-ROM, or DVD, and is read from the recording medium and executed by the computer. The program may be acquired in a form recorded on a portable recording medium such as a CD-ROM or DVD, or may be acquired in a form of delivery via a network such as the Internet. Also good.

1 is a block diagram schematically showing a configuration of an audio device according to an embodiment of the present invention. It is a block diagram for demonstrating the structure of the control unit of FIG. It is a block diagram for demonstrating the structure of the separate reverberation sound addition part of FIG. It is a figure for demonstrating the input-output characteristic of the signal by the compressor of one Embodiment (the 1). It is a figure for demonstrating the input-output characteristic of the signal by the compressor of one Embodiment (the 2). It is a block diagram for demonstrating the structure of the compressor part of FIG. It is a figure for demonstrating the structure of the control process part of FIG. It is a figure for demonstrating the input-output characteristic of the signal by the compression process of a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Acoustic apparatus 111 ... Control processing part (processing control means)
210 _j ... reverberation sound generation unit (reverberation sound generation means)
220 _j ... reverberation sound processing section (reverberation sound processing means)
221 _j Compressor section (compressing means)
222 _j ... Acoustic correction unit (acoustic correction means)
230 ... Adder (combining means)

Claims (15)

Reverberant generating means for generating a reverberant signal based on the acoustic signal;
Processing control means for issuing a processing command for controlling processing on the reverberant sound signal;
Reverberation sound processing means for processing the reverberation sound signal in accordance with the processing command from the processing control means;
Synthesis means for synthesizing the processing result by the reverberation sound processing means and the acoustic signal;
An acoustic device comprising: The reverberation sound processing means includes compression means for performing a compression process for compressing a level change range of the reverberation sound signal,
The processing command includes a compression control command that specifies an aspect of the compression processing.
The acoustic device according to claim 1.   The acoustic device according to claim 2, wherein the compression control command includes designation of a threshold value to change the processing content corresponding to the level of the reverberation sound signal in the compression processing.   The acoustic device according to claim 3, wherein the processing control unit periodically changes the threshold value.   The compression control command further includes designation of an effect amount that should be uniformly increased with respect to the level of the reverberation signal when the level of the reverberation signal is equal to or less than the threshold value. Item 5. The acoustic device according to Item 3 or 4.   The acoustic device according to claim 5, wherein the processing control unit periodically changes the effect amount.   The compression control command further includes designation of an attack time which is a change time to the result value of the compression processing corresponding to the increase when the level of the reverberation sound signal increases. The acoustic device according to any one of claims 2 to 6.   The acoustic device according to claim 7, wherein the processing control unit periodically changes the attack time.   The compression control command further includes designation of a release time which is a change time to the result value of the compression process corresponding to the decrease when the level of the reverberation sound signal is decreased. The acoustic device according to any one of claims 2 to 8.   The acoustic device according to claim 9, wherein the processing control unit periodically changes the release time.   The acoustic device according to any one of claims 2 to 10, wherein the reverberation sound processing unit further includes an acoustic correction unit that performs acoustic correction on a processing result of the compressing unit.   It is mounted in a mobile body, The acoustic apparatus as described in any one of Claims 1-11 characterized by the above-mentioned. A reverberant sound generating step for generating a reverberant sound signal based on the acoustic signal;
A machining control step of issuing a machining command for controlling machining of the reverberant sound signal;
A reverberation sound processing step of processing the reverberation sound signal in accordance with the processing command;
A synthesis step of synthesizing the processing result in the reverberation processing step and the acoustic signal;
A reverberation sound adding method comprising:   14. A reverberation sound adding program that causes a calculation means to execute the reverberation sound adding method according to claim 13.   15. A recording medium on which the reverberation sound adding program according to claim 14 is recorded so as to be readable by a calculation means.

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