JP2001045600A - Audio reproduction system and balance adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain reproduction with a proper sound volume balance in response to contents of a sound source all the time even when the contents of the sound source are changed and to attain reproduction of a sound field so as to obtain excellent presence. SOLUTION: A control amplifier 2 adjusts sound balance of a reproduction signal selected and supplied by an input selector 1 in response to the operation of a balance volume and supplies the reproduction signal whose balance is adjusted to a main amplifier 3. The control amplifier 2 stores adjustment value of a channel balance while relating with index information when the channel balance is set by the operation of the balance volume by a user in the case that the index information of contents of a sound source such as a CD device SS1 is given from a disk medium. In the case that a signal supplied from a sound source includes the index information and the index information is stored, the channel balance is adjusted according to the adjustment value of the channel balance stored while relating with the index information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio reproduction system for reproducing sound on a plurality of channels, such as a car audio system and a home audio system, and more particularly, to an audio system for adjusting and controlling a channel balance of a reproduction sound volume for audio reproduction. The present invention relates to a reproduction system and a balance adjustment device.

[0002]

2. Description of the Related Art In an audio reproduction system such as a so-called car audio system or home audio system, a CD (Compact Disc.TM.)
ni Disc ~ Trademark) device, DVD (Digital Versatile Dis
c ~ Trademark) device, DAT (Digital Audio Tape ~ Trademark)
A desired sound source device such as a deck, an audio cassette deck, and a tuner for broadcast reception is connected to an amplifier via a selector.

[0003] CD devices, MD devices and DVD devices are:
Plays or records / reproduces various disk media. DA
The T deck performs recording / reproduction of DAT, and the audio cassette deck performs recording / reproduction of a so-called audio cassette, that is, a compact cassette (Compact Cassette to trademark). The tuner uses FM (frequency modula)
tion: frequency modulation broadcast, AM (amplitude modulatio)
n: amplitude modulation) and TV (television) broadcasts.

In such an audio reproducing system,
A selector switches and selects a desired sound source, adjusts the volume, amplifies the sound as appropriate, and supplies the amplified sound to a speaker or the like. Normally, the volume control is performed by a single master volume, but the sound source includes a reproduction signal of a plurality of channels capable of performing stereo reproduction of left and right two channels and surround reproduction of three or more channels. I have. For this reason, the relationship between the volumes of a plurality of reproduction channels is changed to adjust the volume balance, and a reproduction sound field is formed at a desired position.

For example, in the case of a two-channel stereo,
Only when the volume of the speakers that reproduce the left and right channels is approximately equal at the listening position,
An appropriate stereo sound field is formed in which a sound image of a solo instrument or a solo vocal is localized, for example, at the center. If one of the left and right channels is significantly louder than the other, the stereo feeling is lost, only the reproduced sound of that channel is emphasized, and a non-spread, unbalanced reproduced sound field is formed. However, part of the reproduced sound may not be heard sufficiently, or noise may appear. For this reason, the balance is adjusted so that the volume of the left and right channels becomes appropriate at the listening position.

[0006] Japanese Patent Application Laid-Open No. 5-153700 discloses an example of a technique relating to a conventional two-channel stereo system balance adjustment.
And JP-A-6-319200.

Japanese Patent Laid-Open No. 5-153700 discloses that a remote control device is provided with a microphone, an adjustment signal is reproduced, and a control signal corresponding to a comparison of a signal detected by the microphone of the remote control device at a listening position is provided. There is disclosed a technique of transmitting a sound and automatically adjusting a sound volume balance appropriately. Japanese Patent Application Laid-Open No. 6-319200 discloses that, for each listening position, adjustment data of the volume balance suitable for each listening position is stored, and the volume balance is automatically adjusted according to the listening position information where the position of the listener (listener) is detected. A technique for performing this is disclosed.

Further, in an on-vehicle audio reproducing system called a car audio system or the like, a sound reproducing system for reproducing a movie such as a DVD, etc., not only stereos of left and right two channels but also front and rear of a listening position. A system is used in which three or more speakers are distributed and arranged to form a reproduced sound field exhibiting a three-dimensional sound field effect such as a so-called surround sound using multiple channels.

For example, as a system for forming a multi-channel surround sound field, FL, FR, C, LS, R
Some use S and SW channels. FL
The channel is a channel to be reproduced from the front left, that is, the front left, the FR channel is a channel to be reproduced from the front right, that is, the front right, and the C channel is to be reproduced from the center, that is, the center (front). Channel, and the LS channel is
Left surround, that is, left surround, and “Surround” is a channel that should be played from the left rear because it is usually backward, and RS channel is played from the right rear because it is right surround, that is, right surround. Channel to be done. Since the SW channel is a super woofer or sub woofer and is a low-frequency reproduction channel that hardly contributes to directivity and sound image localization, the sound power of the low frequency range is determined rather, and the volume of the low frequency range and the mid-high frequency range is determined. This channel controls the balance.

Therefore, if the reproduction volume of the FL channel is relatively increased with respect to the other channels, the sound field and the sound image to be formed are shifted to the front left, and the reproduction volume of the RS channel is changed with respect to the other channels. If the sound field and the sound image are relatively large, the formed sound field and the sound image are shifted to the rear right, and if the reproduction volume of the C channel is relatively large with respect to the other channels, the formed sound field and the sound image are forward. shift. Specifically, for example, in the case of an orchestra performance, a concert hall live performance, and a movie, it is more realistic to arrange the main sound field and the sound image closer to the front and use only the surround sound effect such as hall reverberation in the rear. In the case of small-chamber performances such as chamber music and studio performances such as jazz and rock, the difference between front and back is eliminated, and the listener is located near the center of the sound field, and the sound image is closer to the listener. It is often the case that a more effective presence is obtained. As described above, in the multi-channel reproduction system of three or more, the reproduction sound field is formed so that the sound image is distributed not only in the left-right direction but also in the front-rear direction, and a preferable channel balance is obtained depending on the contents of a program such as music and a recording form. There are many differences.

[0011]

As described above, as the number of channels is increased, the channel balance needs to be finely and frequently adjusted according to complicated preferences and requirements. Patent Publication and Japanese Patent Laid-Open No. Hei 6
A simple automatic adjustment as disclosed in Japanese Patent Application Laid-Open No. -319200 cannot meet the user's request.

Generally, the setting of the channel balance by manual operation is performed by a process as shown in FIG. With the audio playback system activated,
When the user updates and sets the channel balance (step S101), the sound source is reproduced in the set state (step S102). During the reproduction of the sound source, it is always checked whether or not the user has performed a balance change adjustment operation (step S103). When the balance change adjustment operation is performed, the process returns to step S101 to update the channel balance. Will be Step S103
In step, if the balance change adjustment operation is not performed, the process returns to step S102 to check the sound source reproduction and the balance change adjustment operation.

By the way, in the conventional audio reproduction system, the adjustment of the channel balance is generally performed individually as necessary at the time of reproduction. JP-A-5-153700 and JP-A-6-3192 for automatically adjusting by storing a channel balance adjustment pattern
Even in a technique such as that disclosed in Japanese Patent Application Publication No. 00-200, at least at a specific listening position, only one pattern is stored in the channel balance, and the balance according to the content of the reproduced audio signal unless the balance is individually readjusted. No adjustment could be made.

The term "channel balance" means that, in principle, the reproduction volume level of each channel, such as the FL channel, FR channel, C channel, LS channel, RS channel and SW channel, is adjusted so as to improve the audibility at the listener's position. The adjustment is performed so that sound is reproduced at a uniform volume level for any channel. Such a balance adjustment can be performed with high accuracy by using, for example, a test tone if the listening position is at a fixed point and the reproduction signal level is simply made uniform. However, an appropriate balance adjustment amount may be slightly adjusted depending not only on the position of the listener but also on the taste of each listener and the content of the sound source. In such a case, in the above-described conventional method, individual adjustment must be performed each time, which is very inconvenient.

[0015] The present invention has been made in view of the above circumstances, and even if the content of an acoustic source changes, it can always be reproduced with an appropriate volume balance according to the content, and an excellent sense of realism can be obtained. It is an object of the present invention to provide an audio reproduction system and a balance adjustment device that enable good sound field reproduction.

[0016]

In order to achieve the above object, an audio reproducing system according to a first aspect of the present invention switches and selects inputs from a plurality of audio sources to provide audio reproduction for a plurality of channels. In the system, input selector means for selectively switching an input system of audio signals from a plurality of audio sources, and volume adjustment means for adjusting the reproduction volume of a plurality of channels of the audio signal selected by the input selector means for each reproduction channel Sound reproduction means for reproducing the audio signals of the plurality of channels whose volume has been adjusted by the volume adjustment means, storage means for holding a balance adjustment value of the reproduction volume of the plurality of channels, and the input selector means. For the playback audio signal of multiple channels of the sound source, Adjusting and setting the channel balance as desired, and controlling the volume adjustment by the volume adjustment means based on the balance adjustment value, causing the storage means to hold the balance adjustment value, and controlling the audio signal from the sound source. When individual information indicating each source medium is supplied by the input system, the balance adjustment value of the channel balance of the reproduction volume is held in the storage unit in association with the individual information, and the individual When the individual information indicating the source medium is supplied and the corresponding individual information is held in the storage unit, the volume adjustment by the volume adjustment unit is controlled based on the channel balance adjustment value corresponding to the individual information. And when the sound source does not supply the individual information indicating the individual source media, and When the individual information corresponding to the storage means is not held, if there is a channel balance adjustment value held in the storage means without associating the individual information with the individual information, the volume adjustment means performs the processing based on the balance adjustment value. Balance control means for controlling volume adjustment.

The storage means includes means for invalidating a balance adjustment value associated with the individual information and validating only a balance adjustment value not associated with the individual information in conjunction with turning on / off of a system power supply. You may go out.

The storage means invalidates a balance adjustment value associated with the individual information and activates only a balance adjustment value not associated with the individual information in conjunction with a switching operation of the input selector means. May be included.

The storage means has a storage area for storing a plurality of balance adjustment values not associated with the individual information, and the balance control means selects a plurality of balance adjustment values stored in the storage means. It may include a means for making it effective.

According to a second aspect of the present invention, there is provided a balance adjusting device for adjusting a reproduction volume of a plurality of channels of an audio signal for each reproduction channel, and a multi-channel audio signal whose volume is adjusted by the volume adjustment unit. Sound reproducing means for reproducing sound, and storage means for holding a balance adjustment value of the reproduction volume of the plurality of channels,
Adjusting and setting the channel balance of the playback volume as desired for the plurality of channels of playback audio signals,
And controlling the sound volume adjustment by the sound volume adjustment means based on the balance adjustment value, causing the storage means to hold the balance adjustment value, and supplying individual information indicating each source medium together with the audio signal. The storage unit stores the balance adjustment value of the channel balance of the reproduction volume in the storage unit in association with the individual information, and supplies the individual information indicating the individual source medium and stores the corresponding individual information in the storage unit. The volume control by the volume controller based on the channel balance adjustment value corresponding to the individual information, and corresponds to the case where the individual information indicating the individual source medium is not supplied and the storage unit. If the individual information to be stored is not held, the individual information is held in the storage unit without being associated with the individual information. If there is channel balance adjustment value comprises the balance control means for controlling the sound volume adjustment by the sound volume adjusting means on the basis of the balance adjustment value.

The storage means includes means for invalidating the balance adjustment value associated with the individual information and validating only the balance adjustment value not associated with the individual information in conjunction with turning on / off the power supply of the apparatus. You may go out.

The storage means has a storage area for storing a plurality of balance adjustment values not associated with the individual information, and the balance control means selects a plurality of balance adjustment values stored in the storage means. It may include a means for making it effective.

An audio reproducing system and a balance adjusting device according to the present invention adjust and set a channel balance of a reproducing sound volume as desired for reproduced audio signals of a plurality of channels of a sound source, and adjust the sound volume based on the balance adjustment value. Controlling the volume adjustment by the means, storing the balance adjustment value in the storage means, and when individual information indicating each source medium is supplied by the input system of the audio signal from the audio source,
When the balance adjustment value of the channel balance of the reproduction volume is stored in the storage unit in association with the individual information, and when the individual information indicating the individual source medium is supplied from the sound source and the corresponding individual information is stored in the storage unit, Controls the sound volume adjustment by the sound volume adjustment means based on the channel balance adjustment value corresponding to the individual information. When the individual information indicating the individual source medium is not supplied from the sound source, the individual information corresponding to the storage means is held. Otherwise, if there is a channel balance adjustment value stored in the storage unit without being associated with the individual information, a balance control unit that controls volume adjustment by the volume adjustment unit based on the balance adjustment value is provided. . Such an audio reproducing system and a balance adjustment device hold a balance adjustment value in storage means corresponding to individual information indicating a source medium, and use the stored balance adjustment value for the individual information. Even if changes, you can always play at the appropriate volume balance according to the content,
Good sound field reproduction with excellent realism can be obtained.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of an audio reproduction system according to an embodiment of the present invention.

The audio reproduction system shown in FIG. 1 includes an input selector 1, a control amplifier (control amplifier) 2, and a main amplifier (main amplifier) 3.
The input selector 1 has a sound source such as C
D device SS1, MD device SS2 and DVD device SS3
And the like, and a speaker group SP is connected to the main amplifier 3.

The input selector 1 switches and selects a reproduction signal of an audio source such as the CD device SS1, the MD device SS2, and the DVD device SS3 in accordance with a user operation, and supplies the reproduced signal to the control amplifier 2. For example, in the CD device SS1, the MD device SS2, the DVD device SS3, etc., it is possible to selectively set an individual source medium such as a disk medium to one acoustic source and reproduce the same. In such a case, the CD device SS1 and the MD device S
S2 and the DVD device SS3 and the like supply to the input selector 1 together with a reproduction signal, media individual information, for example, TOC (table of contents), which is referred to as TOC (table of contents) information.

The control amplifier 2 responds to the reproduced signal selected and supplied by the input selector 1
A required process such as adjusting a signal level according to a master volume operation is performed, and a balance is adjusted according to a balance volume operation, and the resultant signal is supplied to the main amplifier 3 for each reproduction channel. The control amplifier 2 sets a channel balance by a user's balance volume operation at the time of starting the system, and stores it as a base adjustment value of the channel balance. Thereafter, the control amplifier 2 adjusts and sets the channel balance according to the stored base adjustment value unless a new balance volume operation is performed.

Further, the control amplifier 2 is provided with table of contents information (TOC information) on the source contents from a disk medium as a source medium for audio sources such as the CD apparatus SS1, the MD apparatus SS2 and the DVD apparatus SS3. In this case, when the channel balance is set by the balance volume operation by the user operation, the adjustment value of the channel balance is stored in association with the table of contents information. The signal supplied from the sound source selected by the input selector 1 includes table of contents information,
When the table of contents information is stored, the channel balance is adjusted according to the channel balance adjustment value stored in association with the table of contents information.

The storage of the balance adjustment value according to the table of contents information is cleared by at least one of turning on / off the power and switching the input selector 1, and the reproduction channel balance is the base adjustment of the channel balance stored first. Set to value.

The control amplifier 2 includes a signal processing unit 21
, A CPU (central control unit) 22, a memory 23, an electronic volume 24, and an operation unit 25.

The signal processing unit 21 is provided with the input selector 1
Performs a required process on the signal supplied from the CPU, and separates the signal into control information including table of contents information and a normal reproduction signal, and supplies the control information to the CPU 22 and the reproduction signal to the electronic volume 24.

Based on the control information supplied from the signal processing unit 21 and the operation information supplied from the operation unit 25, the CPU 22 writes data to the memory 23, searches the contents of the memory 23, and adjusts the electronic volume 24 for channel balance adjustment. Perform control and so on.

The memory 23 is composed of, for example, a semiconductor non-volatile memory, and stores a channel balance base adjustment value and a channel balance adjustment value for each table of contents information associated with the table of contents information for each source medium.

The electronic volume 24 supplies the reproduced signal supplied from the signal processing section 21 to the main amplifier 3 after adjusting the level and balance under the control of the CPU 22.

The operation section 25 includes a balance volume operation section and a master volume operation section, and provides control adjustment operation information by a user operation of the audio reproduction system in the control amplifier 2 to the CPU 22.

That is, the CPU 22 prompts the user when the system is started up, and causes the channel balance adjustment value to be applied as a specified value to all the sound sources selected by the input selector 1 via the operation unit 25,
The setting information of the channel balance adjustment value is stored in the memory 23 as a base adjustment value. For normal use, CP
U22 sets the channel balance based on the channel balance base adjustment value read from the memory 23 for the audio source selected by the input selector 1. Thereafter, the CPU 22 controls the electronic volume 24 to adjust the channel balance according to the operation of the balance volume operation unit of the operation unit 25.

When the sound source selected by the input selector 1 provides the table of contents information of a disk medium as a source medium such as the CD apparatus SS1, the MD apparatus SS2 or the DVD apparatus SS3, When the channel volume is adjusted and set by operating the balance volume of the operation unit 25 during reproduction of the disk medium or the like, the balance adjustment value is stored in the memory 23 in association with the table of contents information. In the subsequent use, the CPU 22
When table of contents information or the like is given from the sound source selected by the input selector 1, the channel balance adjustment value stored corresponding to the table of contents information or the like is extracted from the memory 23, and the channel balance is adjusted according to the adjustment value. Set. The CPU 22 operates the electronic volume 2 according to the operation of the balance volume operation unit of the operation unit 25.
4 to adjust the channel balance. The setting of the channel balance adjustment value corresponding to the source content information such as the table of contents information is canceled when at least one of power on / off and switching of the selected sound source by the input selector 1 is performed, and is separately stored in the memory 23. Becomes effective.

The main amplifier 3 is a control amplifier 2
Amplifies the reproduction signal controlled by the electronic volume 24 of
FL channel, FR channel, C channel, LS
The sound is reproduced by the speaker group SP including the speakers of the channel, the RS channel, and the SW channel.

Next, the operation of the above-described audio reproduction system will be specifically described with reference to the flowchart shown in FIG. FIG. 2 shows processing related to adjustment setting and storage of the channel balance.

In FIG. 2, when the system is started, the CPU 22 of the control amplifier 2 prompts the user to operate the balance volume operation unit of the operation unit 25, and sets the channel balance at the berth position.
The adjustment value is stored in the memory 23 (Step S1).
The balance adjustment value set at this time becomes the base adjustment value of the channel balance.

Next, at the time of reproduction, the CPU 22 performs communication, for example, serial communication, with the audio source via the input selector 1, and reads the table of contents information, for example, TOC information from the source side (step S2). . CPU
22 checks whether or not the corresponding TOC information and the balance adjustment value are already stored in association with the corresponding TOC information (step S3). If the matching TOC information is stored, the corresponding balance adjustment value is determined. Take out,
The electronic volume 24 is adjusted according to the balance adjustment value to set the channel balance (step S4).

In step S3, when the corresponding TOC information is not stored in association with the balance adjustment value, or when the sound source selected by the input selector 1 does not have the TOC information such as a tuner, etc.
If the OC information is not supplied from the source side,
A step 22 determines whether or not a channel balance change operation has been performed by the balance volume operation unit or the like of the operation unit 25 (step S5), and if TOC information has been given and the channel balance change operation has been performed. Causes the memory 23 to store the corresponding TOC information and the balance adjustment value of the channel balance in association with the TOC information (step S6).

In step S5, when the TOC information is not provided and when the TOC information is provided and the channel balance changing operation is not performed, the CPU 22 turns on / off the power switch and performs the input selector operation. 1 is determined (step S7), and if one of the power switch on / off operation and the input selector 1 switching operation is performed, step S7 is performed.
The control returns to the initially set channel balance base adjustment value set in 1 and stored in the memory 23 to control the electronic volume 24 to set the channel balance (step S8), and then returns to step S2. If it is determined in step S7 that neither the ON / OFF operation of the power switch nor the switching operation of the input selector 1 has been performed, the process directly returns to step S2.

That is, in this audio reproduction system, as described above, first, the user operates the operation unit 25 to set the channel balance at the base position, and stores this in the memory 23 as a base adjustment value. This channel balance base adjustment value can be set by relying on hearing while playing the test tone, by relying on hearing while playing the appropriate sound source, or by using appropriate automatic adjustment means. I do.

In this state, the CD device SS1 and the MD device SS
2 and an audio source such as the DVD device SS3. At this time, for example, serial communication is performed between the sound source and the control amplifier 2 to transmit TOC information to the control amplifier side. When the user feels that the levels of the surround LS channel and the RS channel are low, the user operates the balance volume operation unit of the operation unit 25 to operate the surround channels LS and R.
Set to increase the level of S. The control amplifier 2 uses the set channel balance adjustment value as the TOC
The information is stored in the memory 23 in association with the information.

In this way, when the same TOC is detected next time, the corresponding channel balance adjustment value is automatically extracted from the memory 23 and the setting of the channel balance is switched. However, since the base adjustment value of the channel balance is the channel balance set first, the channel balance setting is always set when the power is turned on / off or when the input selector 1 is switched. It returns to the adjustment value.

As described above, by automatically switching the channel balance in association with individual information such as table of contents information unique to each source medium such as a disc, the user can select a desired source medium of a desired sound source. Just by playing, you can enjoy the sound source program at any time with your favorite channel balance. Therefore, once set, the setting information is stored without being conscious of the user in association with the individual medium information such as the table of contents information, and thereafter the user does not need to do anything, and listens to the same channel balance. Can be. At present, considering that a disk medium having individual source medium information such as TOC information such as CD, MD, and DVD is the mainstream of the acoustic source medium, the channel balance adjustment value is associated with the individual source medium individual information. Most sound sources can be covered by storing and automatically setting.

In the above description, the channel balance adjustment value is stored in the control amplifier 2 in association with the medium individual information such as the table of contents information (TOC information) and automatically set. However, the sound source such as the CD device SS1 is used. It is also possible to provide a similar configuration on the side, store the channel balance adjustment value in association with the medium individual information, and automatically set it.

When the base adjustment value of the channel balance is stored, a number of listening positions and desired sound field patterns may be stored, and these may be selectively called and set by a user operation. Good.

Further, in the above description, the case where the apparatus is configured as an audio reproduction system has been described. However, the main configuration for setting the channel balance included in the above-described control amplifier 2 may be incorporated into a desired apparatus or the reproduction system. It may be configured as a balance adjusting device to be inserted into the device.

[0051]

As described above, according to the present invention, even when the content of the sound source changes, the sound source can always be reproduced with an appropriate volume balance according to the content, and an excellent sense of reality can be obtained. It is possible to provide an audio reproduction system and a balance adjustment device that enable good sound field reproduction.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a configuration of an audio reproduction system according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining processing related to channel balance adjustment setting in the audio reproduction system of FIG. 1;

FIG. 3 is a flowchart for explaining processing related to channel balance adjustment setting in a conventional audio reproduction system.

[Explanation of symbols]

Reference Signs List 1 input selector 2 control amplifier (control amplifier) 3 main amplifier (main amplifier) 21 signal processing unit 22 CPU (central control unit) 23 memory 24 electronic volume 25 operation unit SP speaker group SS1 CD (compact disk) device SS2 MD (mini) Disc) device SS3 DVD (Digital Versatile Disc)
apparatus

Claims (7)

[Claims] 1. An audio reproduction system for switching and selecting inputs from a plurality of sound sources to provide sound reproduction of a plurality of channels, input selector means for selectively switching an input system of audio signals from the plurality of sound sources, Volume adjustment means for adjusting the reproduction volume of a plurality of channels of the audio signal selected by the input selector means for each reproduction channel; and sound reproduction means for performing sound reproduction of the audio signals of the plurality of channels whose volume has been adjusted by the volume adjustment means. A storage unit for holding a balance adjustment value of the reproduction volume of the plurality of channels, and adjusting and setting the channel balance of the reproduction volume as desired with respect to the reproduction audio signals of the plurality of channels of the sound source selected by the input selector unit, And the volume adjustment based on the balance adjustment value. Controlling the volume adjustment by the step, the balance adjustment value is held in the storage means, and when individual information indicating each source medium is supplied by the input system of the audio signal from the audio source, A balance adjustment value of a channel balance of a reproduction volume is stored in the storage unit in association with the individual information, and individual information indicating the individual source medium is supplied from the sound source, and the corresponding individual information is stored in the storage unit. In the case where the individual information indicating the individual source media is not supplied from the sound source, and If the individual information corresponding to the storage means is not held, the storage is performed without associating the individual information with the individual information. An audio reproduction system comprising: a balance control unit that controls a volume adjustment by the volume adjustment unit based on a channel balance adjustment value held in the unit, if any. 2. The storage means for invalidating a balance adjustment value associated with the individual information and validating only a balance adjustment value not associated with the individual information in conjunction with turning on / off of a system power supply. The audio reproduction system according to claim 1, comprising: 3. The storage means, in conjunction with a switching operation of the input selector means, invalidates a balance adjustment value associated with the individual information, and validates only a balance adjustment value not associated with the individual information. 3. The audio reproduction system according to claim 1, further comprising a unit. 4. The storage means has a storage area for storing a plurality of balance adjustment values not associated with the individual information, and the balance control means includes a plurality of balance adjustment values stored in the storage means. 4. The audio reproducing system according to claim 1, further comprising a unit for selectively validating the audio reproduction. 5. A sound volume adjusting means for adjusting a reproduction volume of a plurality of channels of an audio signal for each reproduction channel; an audio reproducing means for sound reproducing the audio signals of a plurality of channels whose volume has been adjusted by said volume adjusting means; Storage means for holding a balance adjustment value of the playback volume of the channel; and adjusting and setting the channel balance of the playback volume for the playback audio signals of the plurality of channels as desired,
And controlling the sound volume adjustment by the sound volume adjustment means based on the balance adjustment value, causing the storage means to hold the balance adjustment value, and supplying individual information indicating each source medium together with the audio signal. The storage unit stores the balance adjustment value of the channel balance of the reproduction volume in the storage unit in association with the individual information, and supplies the individual information indicating the individual source medium and stores the corresponding individual information in the storage unit. The volume control by the volume controller based on the channel balance adjustment value corresponding to the individual information, and corresponds to the case where the individual information indicating the individual source medium is not supplied and the storage unit. If the individual information to be stored is not held, the individual information is held in the storage unit without being associated with the individual information. If there is channel balance adjustment value, balance adjustment device characterized by comprising a balance control means for controlling the sound volume adjustment by the sound volume adjusting means on the basis of the balance adjustment value. 6. A storage means for invalidating a balance adjustment value associated with the individual information and validating only a balance adjustment value not associated with the individual information in conjunction with turning on / off of a device power supply. The balance adjusting device according to claim 5, comprising: 7. The storage means has a storage area for storing a plurality of balance adjustment values not associated with the individual information, and the balance control means includes a plurality of balance adjustment values stored in the storage means. The balance adjusting device according to claim 5, further comprising a unit that selectively makes the balance effective.