JP2005117361A - Acoustic device,and acoustic characteristic setting method for acoustic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acoustic device and an acoustic characteristic setting method which automatically set acoustic characteristics by identifying the type of a speaker system. <P>SOLUTION: This acoustic device comprises: speaker systems 3a-c composed of a plurality of speakers 31-37; an acoustic characteristic control part 6 for controlling the characteristics of sound signals of a plurality of channels; an amplifying part 7 for amplifying the sound signals of the plurality of channels and outputting the amplified sound signals to the speaker system 3a-c; a plurality of connection lines 8a-d through which the sound signals of the plurality of channels are made to pass; current measuring means 9a and 9b for measuring current values about all or a portion of the plurality of connection lines 8a-d; and a storing means 11 for storing a set value determined for every type of the speaker system 3a-c. The speaker system 3a-c is identified on the basis of the current values measured by the current measuring means 9a and 9b, and a set value corresponding to the speaker system 3a-c is read, thereby setting an acoustic characteristic parameter with respect to the acoustic characteristic control part 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an acoustic device including a speaker system including a plurality of speakers, and an acoustic characteristic setting method for such an acoustic device.

  Usually, the acoustic device includes a speaker system including a plurality of speakers. When there are a plurality of types of speaker systems used in the audio apparatus, it is necessary to optimize various acoustic characteristics such as frequency characteristics and cut-off frequency for the speaker system including the audio apparatus. For this reason, in the conventional acoustic apparatus, a circuit board for controlling acoustic characteristics having different specifications for each type of speaker system provided is used.

However, in the manufacturing process of the conventional acoustic device as described above, since it is necessary to fabricate a plurality of types of acoustic characteristic control circuit boards having different electronic elements such as resistors and capacitors to be mounted, The burden is significant and an increase in the substrate assembly process has occurred. In addition, as the types of speaker systems that can be used in the audio device increase, the types of circuit boards for controlling the acoustic characteristics also increase, and the manufacturing process of the audio device has become more complicated. In order to solve this problem, it is conceivable that the acoustic characteristics of the acoustic apparatus are controlled using a DSP (Digital Signal Processor) or the like, and the acoustic characteristics corresponding to the speaker system to be used are set by software.
Japanese Patent Laid-Open No. 11-289600

  However, in the case of an in-vehicle audio device, the speaker system is connected to the main body of the audio device in the manufacturing process of the automobile, so the automobile manufacturer or seller sets the acoustic characteristics corresponding to the speaker system to be used. This is done by operating the main body of the acoustic device. Since these people generally do not have sufficient knowledge about the acoustic device, it is predicted that the task of setting the acoustic characteristics will be a burden. In particular, when the specifications of the main unit of the audio device are changed, or when there are multiple types of main units to be handled, it is a heavy burden on the automobile manufacturer or seller to store the operation procedure for setting the acoustic characteristics. It becomes.

  The present invention solves this problem, and provides an acoustic apparatus and an acoustic characteristic setting method for automatically identifying acoustic characteristics corresponding to the speaker system by identifying the type of the speaker system provided. To do.

  The acoustic device of the present invention includes a speaker system including a plurality of speakers, an acoustic characteristic control unit that controls characteristics of audio signals of a plurality of channels based on a plurality of acoustic characteristic parameters that provide acoustic characteristics, and the plurality of channels. And a plurality of connection lines connected to the amplifying unit and through which the plurality of channels of audio signals output from the amplifying unit to the speaker system pass. Current measuring means for measuring current values for all or a part of the plurality of connection lines; and storage means for storing setting values determined for each type of the speaker system for the plurality of acoustic characteristic parameters. And identifying the speaker system based on the current value measured by the current measuring means, It reads the set value corresponding to the speaker system, the setting of the plurality of acoustic characteristic parameters for the acoustic characteristic control unit.

  Furthermore, the acoustic device of the present invention processes an audio signal obtained from a sound source selected from a plurality of sound sources, and the storage means determines for each type of the speaker system according to each of the plurality of sound sources. The set values are stored, the set values corresponding to the selected sound source and the speaker system are read, and the plurality of acoustic characteristic parameters are set to the acoustic characteristic control unit.

  Further, the acoustic characteristic automatic setting method of the acoustic device according to the present invention includes a speaker system configured by a plurality of speakers, and an acoustic device that controls the characteristics of a plurality of channels of audio signals based on a plurality of acoustic characteristic parameters that give the acoustic characteristics. In an acoustic characteristic setting method of an acoustic device comprising a characteristic control unit and an amplification unit that amplifies the plurality of channels of audio signals and outputs the amplified signal to the speaker system, the amplification unit is connected to the amplification unit, and the amplification unit A signal having a predetermined frequency and level is output from the amplifying unit to the speaker system for all or a part of a plurality of connection lines through which the audio signals of the plurality of channels output to the speaker system pass, and current values are measured. And a second step for identifying the speaker system based on the current value measured in the first step. And for the plurality of acoustic characteristic parameters, a setting value corresponding to the speaker system is read from a storage unit that stores a setting value determined for each type of the speaker system, and is sent to the acoustic characteristic control unit. And a third step of setting the plurality of acoustic characteristic parameters.

  Between audio devices using different types of speaker systems, there is a difference in impedance between connecting lines with different speaker configurations, and when a signal with a predetermined frequency and level is output, The current value of the flowing current is different. For example, when a signal having a predetermined frequency and level is output to a certain connection line, the current value of the connection line is determined when one speaker is connected to the connection line and when a plurality of speakers are connected. Is different. Therefore, by providing a current measuring means for measuring the current value of the connection line, the speaker system included in the acoustic device is identified from the current value measured when a signal having a predetermined frequency and level is output from the amplifying unit. it can.

  As described above, according to the present invention, it is possible to automatically identify the speaker system included in the audio device, and to store the set value of the acoustic characteristic parameter determined for each type of speaker system in the storage means. By doing so, it is possible to automatically set the acoustic characteristic corresponding to the identified speaker system to the acoustic characteristic control unit. In addition, by storing the setting values determined for each type of speaker system in accordance with each of a plurality of sound sources in the storage means, the acoustic characteristic setting corresponding to the selected sound source and speaker system is automatically set. Can be done.

  The current measuring means may measure the current value for all connection lines, but in each type of speaker system, for example, the relevant channel, such as front L (left) channel signal and front R (right) channel signal. In many cases, a pair of connection lines from which signals are output have the same configuration of speakers connected to these connection lines. Therefore, in such a case, the current measuring unit may measure the current value for a part of the connection line connected to the amplifying unit. In addition, in a certain speaker system, in order to identify a speaker system even if the configuration of the speaker is different between a pair of connection lines from which related channel signals are output, it is necessary to compare the connection with other speaker systems. Since it is only necessary to measure the current value of the connection line having a different configuration of the speaker, there is no problem even if the current measurement means measures the current value of a part of the connection line.

  Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an outline of an on-vehicle acoustic apparatus according to an embodiment of the present invention. The body part (1) of the in-vehicle acoustic device is attached to the console of the center panel of the automobile, amplifies the audio signal output from the built-in sound source part (2), and the speaker system ( Output to 3a). The sound source unit (2) corresponds to a plurality of sound sources such as an AM signal, an FM signal, MD, and CD-DA, and includes a tuner, an MD reproducing unit, a CD reproducing unit, and the like for reproducing these. The microcomputer (hereinafter referred to as “microcomputer”) (4) operates the sound source unit (2) so that the reproduction process is performed on the sound source selected by the user using the operation unit (5). The sound source unit (2) outputs two audio signals, an L channel signal and an R channel signal obtained from the selected sound source, and these signals are sent to an acoustic characteristic control unit (6) configured by a DSP. It is done.

  The acoustic characteristic control unit (6) includes four signal processing units (6a-d). The L channel signal is sent to the first signal processing unit (6a) and the second signal processing unit (6b), and the R channel signal is sent to the third signal processing unit (6c) and the fourth signal processing unit (6d). The first signal processing unit (6a) processes the L channel signal and outputs a front L channel signal. The second signal processing unit (6b) processes the L channel signal and outputs a rear L channel signal. The third signal processing unit (6c) processes the R channel signal and outputs a front R channel signal. The fourth signal processing unit (6d) processes the R channel signal and outputs a rear R channel signal. The characteristics of the front L channel signal, the rear L channel signal, the front R channel signal, and the rear R channel signal are controlled by these signal processing units (6a-d), that is, by the acoustic characteristic control unit (6). The acoustic characteristic control unit (6) controls these signals based on a plurality of acoustic characteristic parameters that give the acoustic characteristics. By transmitting the set values of these acoustic characteristic parameters from the microcomputer (4) to the acoustic characteristic control unit (6), the acoustic characteristic parameters are set to the acoustic characteristic control unit (6).

  FIG. 2 is a block diagram showing an outline of the first signal processing unit (6a). The other signal processing units (6b-d) are configured similarly to the first signal processing unit (6a). The L channel signal sent to the first signal processing unit (6a) is first gain-adjusted by the gain adjustment unit (61). The gain adjustment unit (61) adjusts the gain of the audio signal according to the selected sound source. For example, when the FM signal (400 Hz, 30% modulation) is set to 0 dB, the gain adjustment unit (61) sets the gain amount of the CD reproduction signal (400 Hz, 30% modulation) to +10 dB and the AM signal (400 Hz, 30% modulation). ) Is adjusted to +5 dB.

  The front-rear gain difference adjustment unit (62) performs an adjustment that causes a gain difference between the front-side audio signal and the rear-side audio signal. One of the acoustic characteristic parameters is a front / rear gain difference. When the front / rear gain difference is set to −2 dB, for example, the front / rear gain difference adjustment unit (62) included in the second signal processing unit (6b) The audio signal sent from the adjustment unit (61) is attenuated by -2 dB. On the other hand, the front / rear gain difference adjustment unit (62) provided in the first signal processing unit (6a) sends the audio signal sent from the gain adjustment unit (61) to the frequency characteristic adjustment unit (63) as it is.

  The frequency characteristic adjustment unit (63) adjusts the frequency characteristic of the audio signal sent from the front and rear gain difference adjustment unit (62) so as to give the frequency characteristic set by the microcomputer (4). The frequency characteristic is given by a plurality of acoustic characteristic parameters, for example, attenuation amounts at a reference frequency, a low frequency side, and a high frequency side. For example, the frequency characteristic adjustment unit (63) attenuates at a constant slope (for example, 3 dB / oct) with a frequency of 1 kHz as a reference (0 dB), and is set at a low frequency and a high frequency. The audio signal is adjusted so as to obtain the attenuated amount.

  The cut-off frequency adjusting unit (64) includes a high-pass filter and a low-pass filter. The cutoff frequency of these filters is an acoustic characteristic parameter. For example, when 30 Hz is set as the cutoff frequency on the low frequency side and 20 kHz is set as the cutoff frequency on the high frequency side, the high pass of the cutoff frequency adjusting unit (64) is set. The cut-off frequency of the filter is 30 Hz, and the cut-off frequency of the low-pass filter is 20 kHz.

  Refer to FIG. 1 again. The front L channel signal, rear L channel signal, front R channel signal, and rear R channel signal output from the acoustic characteristic control unit (6) are sent to the amplification unit (7). The amplifying unit (7) includes amplifiers (7a-d) for amplifying these signals. The front L channel signal amplified by the first amplifier (7a) is sent to the front L speaker (31) through the first connection line (8a) connected to the first amplifier (7a). The rear L channel signal amplified by the second amplifier (7b) is sent to the rear L speaker (32) through the second connection line (8b) connected to the second amplifier (7b). The front R channel signal amplified by the third amplifier (7c) is input to the front R speaker (33) through the third connection line (8c) connected to the third amplifier (7c). The rear R channel signal amplified by the fourth amplifier (7d) is input to the rear R speaker (34) through the fourth connection line (8d) connected to the fourth amplifier (7d). The front L speaker (31) and the front R speaker (33) are respectively attached to the inner side surfaces of the left and right front doors of the automobile, for example, and the rear L speaker (32) and the rear R speaker (34) are, for example, a rear tray. Attached to both ends.

  The on-vehicle acoustic device includes a first current measurement unit (9a) and a second current measurement unit (9b) that measure current values flowing in the first connection line (8a) and the second connection line (8b), respectively. . These current measurement units (9a) and (9b) include, for example, coils that surround the connection lines (8a) and (8b), respectively, and use the electromotive force generated in the coils to connect the connection lines (8a) and (8b). Each current value is measured. The current values measured by the first current measuring unit (9a) and the second current measuring unit (9b) are sent to the microcomputer (4).

  The microcomputer (4) is connected to a rewritable nonvolatile memory (11) for storing a control program for the in-vehicle acoustic device executed by the microcomputer (4), an acoustic characteristic comparison table to be described later, and the like. As the nonvolatile memory (11), an EEPROM, a flash memory, or the like is used. The microcomputer (4) incorporates a CPU, RAM, ROM, etc., and the main body (1) is incorporated into the main body (1) based on the current values measured by the first current measuring unit (9a) and the second current measuring unit (9b). The type of the connected speaker system is identified, and the acoustic characteristic parameter is set to the acoustic characteristic control unit (6) so that the optimum acoustic characteristic for the speaker system can be obtained.

  FIG. 1 shows a state in which the speaker system connected to the main body (1) of the in-vehicle acoustic device is a four-speaker system (3a) composed of four speakers (31-34). A speaker system of a type other than the 4-speaker system (3a) can be connected to the main body (1). FIG. 3 is a block diagram of the in-vehicle audio device showing a state in which the 6-speaker system (3b) is connected to the main body (1). This 6-speaker system (3b) is obtained by adding an L tweeter (35) and an R tweeter (36) to the 4-speaker system (3a) shown in FIG. 1, and the L tweeter (35) has a front L channel signal. However, a front R channel signal is input to the R tweeter (36). The L tweeter (35) is connected to a connection line branched from the first connection line (8a), and the R tweeter (36) is connected to a connection line branched from the third connection line (8c). The L tweeter (35) and the R tweeter (36) are attached, for example, near the center console of an automobile.

  FIG. 4 is a block diagram of the in-vehicle audio device showing a state in which the 7 speaker system (3c) is connected to the main body (1). The 7 speaker system (3c) is obtained by adding a woofer (37) to the 6 speaker system (3b) shown in FIG. 3, and a rear L channel signal is input to the woofer (37). The woofer (37) is connected to a connection line branched from the second connection line (8b), and is attached to, for example, the center of the rear tray of the automobile.

  As shown in FIG. 1, when a four-speaker system (3a) is connected to the main body (1), a front L speaker (31) is connected to the first amplifier (7a). When a 6-speaker system (3b) is connected to the main body (1), a front L speaker (31) and an L-tweeter (35) are connected in parallel to the first amplifier (7a) as shown in FIG. It is connected to the. Accordingly, when a front L channel signal having a predetermined frequency and volume level is output from the first amplifier (7a), a case where the four speaker system (3a) is connected and a case where the six speaker system (3b) is connected. Thus, the current values measured by the first current measuring unit (9a) are different. Similarly, when a rear L channel signal having a predetermined frequency and volume level is output from the second amplifier (7b), a case where the 6 speaker system (3b) is connected and a 7 speaker system (3c) shown in FIG. 4 are connected. The current value measured by the second current measuring unit (9b) is different from the case where the current is measured.

  Accordingly, when a predetermined signal is output from each of the first amplifier (7a) and the second amplifier (7b) and the current value is measured by the first current measuring unit (9a) and the second current measuring unit (9b), 4 Identify which type of speaker system (3a), 6-speaker system (3b), and 7-speaker system (3c) is connected to the main unit (1) from the measured current value. Can do. In this embodiment, when the 6-speaker system (3b) is used for an audio device, the L tweeter (35) is connected to the first amplifier (7a) and the R tweeter (36) is connected to the third amplifier (7c). Connected. When the 7-speaker system (3c) is used for an in-vehicle audio device, the woofer (37) is connected to the second amplifier (7b) instead of the fourth amplifier (7d). Therefore, one of these three types of speaker systems is connected to the main body (1) of the in-vehicle acoustic device without measuring the current flowing through the third connection line (8c) and the fourth connection line (8d). Can be identified. Of course, the in-vehicle acoustic device may be provided with a current measuring unit for each of the third connection line (8c) and the fourth connection line (8d), thereby identifying more types of speaker systems. It becomes possible.

  Next, a speaker system identification process performed by the in-vehicle acoustic device of this embodiment will be described. FIG. 5 is a flowchart showing this process. When the operator performs a predetermined operation on the operation unit (5), the speaker system identification process starts (S1). This identification process is irrelevant to general users who use the vehicle-mounted acoustic device. Therefore, the operation of the operation unit (5) instructing the start of the identification process is preferably performed in a so-called hidden mode. For example, the identification process of the speaker system is started by simultaneously pressing a plurality of keys included in the operation unit (5) or by long pressing a certain key.

  When a predetermined operation for instructing the start of the identification processing of the speaker system is performed, the microcomputer (4) outputs a signal having a predetermined frequency and level so that the first amplifier (7a) and the second amplifier (7b) are output. ) Is operated (S2). The frequency and level data of the signals output by the first amplifier (7a) and the second amplifier (7b) at this time are stored in, for example, the nonvolatile memory (11), and the microcomputer (4) stores the nonvolatile memory ( This data is read from 11), and these amplifiers (7a) and (7b) are operated. The signal output from the first amplifier (7a) and the signal output from the second amplifier (7b) may have different frequencies and may have different levels.

  In step S2, a current flows through the first connection line (8a) and the second connection line (8b), and the current value is measured by the first current measurement unit (9a) and the second current measurement unit (9b). (S3). The measured current value is sent from the first current measuring unit (9a) and the second current measuring unit (9b) to the microcomputer (4). The non-volatile memory (11) stores a table that associates these current values with the types of speaker systems, and the microcomputer (4) refers to this table so that the main body ( The type of the speaker system connected to 1) is identified (S4). After step S4, the microcomputer (4) stores the identified speaker system type in the nonvolatile memory (11) (S5).

  Next, the reproduction process performed by the in-vehicle acoustic device according to the present embodiment will be described. FIG. 6 is a flowchart showing this processing. First, when the user operates the operation unit (5), a sound source desired to be reproduced is selected from a plurality of sound sources constituting the sound source unit (2) (S11). Then, the microcomputer (4) reads out the setting values of the acoustic characteristic parameters corresponding to the sound source selected in step S11 and the speaker system connected to the main body (1) from the nonvolatile memory (11) ( S12).

  In the non-volatile memory (11), an acoustic characteristic symmetry table that gives setting values of various acoustic characteristic parameters for each type of speaker system that can be connected to the main body (1) is stored for each sound source. In step S12, the microcomputer (4) refers to the acoustic characteristic symmetry table corresponding to the sound source selected in step S11, and various acoustic characteristics corresponding to the type of the speaker system identified in the identification process shown in FIG. The parameter setting values (acoustic characteristic parameter setting value group) are read from the nonvolatile memory (11).

  As an example, FIG. 7 shows an acoustic characteristic comparison table referred to when the sound source is a CD. In this embodiment, the acoustic characteristic parameters are the front-rear level difference, the attenuation at 20 Hz, 1 kHz, and 20 kHz that give the frequency characteristics, and the cut-off frequencies at the low and high frequencies. In the acoustic characteristic comparison table shown in FIG. 7, for each of the three speaker systems (3a-c) shown above, acoustic characteristic parameter setting values that give the optimum acoustic characteristic when the sound source is CD-DA. Is stipulated. These set values of the acoustic characteristic parameters are determined by testing or simulation. In the nonvolatile memory (11), in addition to the acoustic characteristic comparison table shown in FIG. 7, a similar acoustic characteristic comparison table is stored for each of the sound sources such as AM signals, FM signals, and MDs.

  The microcomputer (4) transmits the set value group of the read acoustic characteristic parameter to the acoustic characteristic control unit (6) after step S12, and the acoustic characteristic parameter is set in the acoustic characteristic control unit (6) ( S13). When the user operates the operation unit (5) to instruct the start of reproduction, the sound source is reproduced (S14). An audio signal is sent from the sound source unit (2) to the acoustic characteristic control unit (6), and the acoustic characteristic control unit (6) processes the audio signal based on the acoustic characteristic parameter set in step S13. As a result, the sound source is reproduced with the optimal acoustic characteristics corresponding to the sound source and the speaker system in the in-vehicle acoustic device.

  In the present embodiment, the current measuring units (9a) and (9b) are provided so as to measure the current value of the first connection line (8a) and the current value of the second connection line (8b). When the woofer (37) of the seven speaker system (3c) is connected to the fourth amplifier (7d) instead of the second amplifier (7b), the current value of the third connection line (8b) and the fourth connection line ( Current measurement units (9a) and (9b) may be provided so as to measure the current value of 8d).

  As described above, the in-vehicle acoustic device according to the present invention automatically determines the type of the speaker system provided and automatically sets the acoustic characteristic control unit so as to obtain an acoustic characteristic suitable for the speaker system. To do. In the above embodiment, the in-vehicle acoustic device that outputs a signal of 4 channels has been described. However, the present invention can be applied to an in-vehicle acoustic device that outputs a signal of 5.1 channel or 6 channels, for example. The present invention is not limited to an in-vehicle audio device, and can be applied to an audio device such as a home DVD playback device or a commercial karaoke device.

  The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Each part configuration of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

It is a block diagram of the vehicle-mounted audio apparatus which concerns on this invention which provided 4 speaker system. It is a block diagram which shows the signal processing part which the acoustic characteristic control part of the vehicle-mounted audio apparatus which concerns on this invention comprises. It is a block diagram of the vehicle-mounted audio apparatus which concerns on this invention which provided 6 speaker system. It is a block diagram of the vehicle-mounted audio apparatus which concerns on this invention which provided 7 speaker system. It is a flowchart which shows the identification process of the speaker system in the vehicle-mounted audio apparatus which concerns on this invention. It is a flowchart which shows the reproduction | regeneration process in the vehicle-mounted audio apparatus which concerns on this invention. It is explanatory drawing which shows an example of the acoustic characteristic comparison table memorize | stored in the vehicle-mounted audio apparatus which concerns on this invention.

Explanation of symbols

(1) Main unit
(2) Sound generator
(3a-c) Speaker system
(6) Acoustic characteristic control unit
(7) Amplifier section
(8a-d) Connection line
(9a) (9b) Current measurement section
(11) Non-volatile memory
(31-37) Speaker

Claims (4)

A speaker system (3a-c) composed of a plurality of speakers (31-37);
Based on a plurality of acoustic characteristic parameters that give the acoustic characteristics, an acoustic characteristic control unit (6) that controls the characteristics of the audio signals of multiple channels,
An amplifying unit (7) for amplifying the audio signals of the plurality of channels and outputting to the speaker system (3a-c);
A plurality of connection lines (8a-d) connected to the amplification unit (7) and through which the audio signals of the plurality of channels output from the amplification unit (7) to the speaker system (3a-c) pass. ,
Current measuring means (9a) (9b) for measuring a current value for all or a part of the plurality of connection lines (8a-d),
For the plurality of acoustic characteristic parameters, comprising storage means (11) for storing setting values determined for each type of the speaker system (3a-c),
The speaker system (3a-c) is identified based on the current value measured by the current measuring means (9a) (9b), and the setting corresponding to the speaker system (3a-c) from the storage means (11) An acoustic device that reads values and sets the plurality of acoustic characteristic parameters to the acoustic characteristic control unit (6). Processes audio signals obtained from sound sources selected from multiple sound sources,
The storage means (11) stores a set value determined for each type of the speaker system (3a-c) according to each of the plurality of sound sources,
The setting value corresponding to the selected sound source and the speaker system (3a-c) is read, and the plurality of acoustic characteristic parameters are set in the acoustic characteristic control unit (6). Acoustic device. It has a sound source part (2) that outputs a left channel signal and a right channel signal,
The current measuring means (9a) (9b) measures a current value at least for the connection lines (8a) (8b) through which the left channel signal or a plurality of channels of audio signals generated from the right channel signal pass. Item 3. The acoustic device according to item 1 or item 2. A speaker system (3a-c) composed of a plurality of speakers (31-37) and an acoustic characteristic control unit (6) that controls the characteristics of audio signals of multiple channels based on a plurality of acoustic characteristic parameters that give acoustic characteristics. And an amplifying unit (7) that amplifies the audio signals of the plurality of channels and outputs the amplified signals to the speaker system (3a-c).
A plurality of connection lines (8a-d) connected to the amplifying unit (7) and through which the audio signals of the plurality of channels output from the amplifying unit (7) to the speaker system (3a-c) respectively pass. A first step of measuring a current value by outputting a signal of a predetermined frequency and level from the amplifying unit (7) to the speaker system (3a-c) for all or a part;
A second step of identifying the speaker system (3a-c) based on the current value measured in the first step;
For the plurality of acoustic characteristic parameters, the setting value corresponding to the speaker system (3a-c) is read from the storage means (11) that stores the setting value determined for each type of the speaker system (3a-c). A third step of setting the plurality of acoustic characteristic parameters to the acoustic characteristic control unit (6);
An acoustic characteristic setting method for an acoustic device, comprising:

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