JP2002132280A - Speech reproduction system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to rapidly specify the cause for a defect without visiting a facility where a speech reproduction system is arranged or making reappearance experimentation in case of the occurrence of such defect in this speech reproduction system by a fault or the like and to elucidate the process of falling into the defect. SOLUTION: The speech reproduction system for reproducing a speech signal has a speech signal reproduction means having plural input means for inputting operation information to cause the speech signal reproduction system to perform desired operation, a memory means for indicating the history of the operation information inputted by the input means provided by the speech signal reproduction means and an output means for outputting the operation history information stored in the memory means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio reproducing system, and more particularly, to an audio reproducing system which is provided as facility broadcasting equipment and is suitable for use in in-house broadcasting at the facility.

[0002]

2. Description of the Related Art Conventionally, sound (music) has been transmitted through facility spaces such as atriums, entrance halls, and theme parks.
Directing at public facilities such as stations and airports,
2. Description of the Related Art There is known an audio reproduction system that makes announcements in a building including announcements and warnings.

[0003] Such a conventional audio reproducing system is configured by connecting a reproducing apparatus for reproducing an audio signal, an amplifier, a speaker, and the like. The audio signal reproduced by the reproducing apparatus is amplified by the amplifier, and the speaker is reproduced. Sound is emitted into the space through.

[0004] Such an audio reproduction system is often installed as facility broadcasting equipment for business use. When a broadcast or the like is stopped for some reason, the cause is promptly investigated and the audio reproduction is performed. It is desired to return the system to a normal state.

[0005] Normally, the maintenance is contracted to by the installer, and if a failure occurs due to a failure or the like, the maintenance operator goes to the site to check the defective portion and take measures such as repair. Is going.

[0006] It is difficult for the trader to immediately identify what is the cause of the problem at the site, and check the wiring of various devices such as a playback device and an amplifier and a speaker constituting the audio playback system. It was necessary to check the settings and their settings, and search for the cause.

[0007] Here, when examining the defects, the defects include a case where the device fails and does not operate properly,
If the setting of the device is incorrect and the history of the operation of the device or the history of the setting of the device is unknown, it is difficult to find the cause of the malfunction.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned various problems of the prior art, and an object of the present invention is to provide a sound reproducing system with a failure or the like. If a problem occurs, it is possible to quickly identify the cause of the problem without going to the facility where the sound reproduction system is located or performing a reproduction experiment, and It is an object of the present invention to provide an audio reproduction system capable of identifying the process.

[0009]

In order to achieve the above object, according to the present invention, in a sound reproducing system for reproducing a sound signal, a desired operation for the sound reproducing system is performed. Audio signal reproducing means including a plurality of input means for inputting operation information to be performed, and storage means for storing operation history information indicating a history of the operation information input by the input means included in the audio signal reproducing means And output means for outputting the operation history information stored in the storage means.

According to a second aspect of the present invention, in an audio reproduction system for reproducing an audio signal, operation history information indicating at least a history of operation information indicating an operation state of the audio reproduction system itself is stored. It has storage means and output means for outputting the operation history information stored in the storage means.

Therefore, according to the first and second aspects of the present invention, the operation history information indicating the history of the operation information input by the input means, or at least the operation state of the audio reproduction system itself is determined. The operation history information indicating the history of the operation information to be represented is output from the audio reproduction system by the output means. When the operation history information or the operation history information output in this way is received by the external device, for example, in the event of a failure due to a failure or the like, without going to the facility where the audio reproduction system is arranged, It is possible to confirm a trouble spot by remote control, which greatly helps to quickly identify the cause.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an audio reproducing system according to the present invention.

First, FIG. 1 shows a block diagram of an audio reproducing system according to an embodiment of the present invention.

In the audio reproduction system 100,
A master 104 is connected via a first network 102, and a slave 108, a mixer 110, and an audio / video
The audio amplifier 112 is connected to the amplifier 112.
Are connected to speakers 114L and 114R.

Each of the devices connected to the first network 102 and the second network 106 is assigned an identification number (ID), so that each device can be specified and communicated from outside.

As the first network 102, the Internet or the like can be used.

On the other hand, the second network 106 is a local network for connecting the master 104, the slave 108, the mixer 110, and the audio amplifier 112, respectively.
It can be composed of low-cost devices such as F.

A left channel audio signal and a right channel audio signal indicating music and announcements output from the master 104 and the slave 108 are input to the mixer 110. Are mixed and output to the audio amplifier 112. Audio amplifier 1
12 amplifies the audio signal and outputs the speakers 114L, 114
R, and the audio signal is output to speakers 114L and 114R.
Sounds (music and announcements) can be heard through the space.

FIG. 2 shows a block diagram of the master 104. The master 104 includes a central processing unit (CPU) 10 for controlling the overall operation via a data bus 12, and a central processing unit (CPU) 10. Read-only memory (R) storing a predetermined program for controlling the operation of
OM) 14 and a random access memory (RAM) 16 as a working area in which various registers and the like necessary for the CPU 10 to execute a program are set.
And a media 18 for storing audio signals indicating music and announcements and various information described later, a communication device 20 for connection to the first network 102, and various information necessary for operation. A display 22, an operator 24 for performing an instruction to reproduce an audio signal and various settings, a terminal 26, and a gate array 28 are connected.

Here, the terminal 26 is a terminal block having a plurality of terminals. By connecting an external control device to this terminal block, it is possible to instruct sound reproduction and the like.

The configuration of the slave 108 is the same as the configuration of the master 104 shown in FIG. 2 except that the communication device 20 is omitted.
The detailed description of the configuration and operation of the slave 108 will be omitted by referring to the description of the configuration and operation of 4.

Hereinafter, each of the above-described components will be described in more detail. First, the CPU 10 has a built-in serial interface, and is connected to an external device or the slave 108 via MIDI, so that data communication can be performed.

Further, the CPU 10 has a sensor section 34 for detecting temperature and humidity, and an audio signal which has been analog-converted by a DA converter 32 (described later) connected to the gate array 28. Are connected to a power supply voltage level converter 38 for detecting a power supply voltage.

As the medium 18, for example, an IC card or a floppy disk drive (FDD) can be used.

As described above, this medium 18 has
An audio signal indicating predetermined music or an announcement, system information indicating various settings related to the operation of the entire audio reproducing system 100, and MIDI input from the operator 24, the terminal 26, and an external MIDI device.
Operation history information indicating the history of the operation information input by the three input means, operation history information, and the like are stored.

Here, the operation history information includes self-diagnosis information as operation information indicating the operation state of the audio reproduction system 100 itself, and the environment where the audio reproduction system 100 exists (specifically, temperature, humidity, power supply voltage, etc.). This is information indicating the history of environment information indicating the state of the slave device and slave information that is information indicating the setting contents of various devices connected to the master 104 as the slave 108.

The above-mentioned self-diagnosis information is information representing the result of the self-diagnosis processing. In the self-diagnosis processing in this audio reproduction system, an audio line inspection described below is performed.

In the audio line inspection, a sine wave corresponding to a specific frequency value is read from the ROM 14 and the sine wave is oscillated from the DA converter 32 through the gate array 28. After waiting for a certain period of time until the oscillation waveform from the DA converter 32 settles, the output signal from the DA converter 32 is converted into an absolute value by the absolute value detection circuit unit 36, and the voltage is converted into a digital value by the AD converter of the CPU 10. Then, it is temporarily stored in the RAM 16.

The above process is repeated a predetermined number of times, and the RAM
An average value of a plurality of digital values stored in the memory 16 is detected. It is determined whether or not the average value thus detected is within a predetermined numerical range. If the average value is within the predetermined range, the self-diagnosis result is determined to be OK. For example, the self-diagnosis result is determined to be NO, and self-diagnosis information indicating the self-diagnosis result is stored as operation history information.

In the audio line inspection, the ROM 1
The frequency of the sine wave read from 4 is not limited to a frequency corresponding to a specific frequency, and may be a plurality of types of frequencies. A determination process may be performed.

Further, without being limited to detecting the average value of a plurality of digital values stored in the RAM 16,
One of the oscillation waveforms from the DA converter 32 may be sampled, and the self-diagnosis result determination processing in the audio line inspection may be performed by comparing the data of the one waveform with predetermined data.

The master 104 and the slave 108 can read a sine wave from the ROM 14 to output a sine wave for audio line inspection.
2 cannot output a sine wave for the audio line inspection.

However, since the mixer 110 and the audio amplifier 112 are connected to the downstream of the master 104 and the slave 108 which are sine wave generator built-in devices (see FIG. 1), the mixer 110 and the audio amplifier 112 are output from the master 104 and the slave 108. It is possible to perform a voice line inspection by the same self-diagnosis processing using the sine wave generated.

The self-diagnosis information indicating the self-diagnosis result in the audio line test by the self-diagnosis processing of the mixer 110 and the audio amplifier 112 is transmitted to a predetermined area of the medium 18 of the master 104 via the second network 106. It is stored as history information.

Next, the system information stored in the medium 18 will be described in detail.

The system information is information relating to the audio reproduction system as described above.
There is the following information.

(1) Information on operation history • Whether or not to store the operation history (corresponding to the flag in the flowchart shown in FIG. 3) • Storage area for recording the operation history (designated by start address and end address) (2) Information on operation history-Whether or not to store the operation history (corresponding to the flag in the flowchart shown in Fig. 4)-Operation Storage area for recording history ・ Whether or not to store self-diagnosis information and environmental information in operation history ・ Frequency when recording self-diagnosis information (time interval) ・ Frequency when recording environmental information (Time Interval) The system information described above is stored in the operation unit 24 or M
The setting can be externally changed via the IDI interface or the network.

The operation of the audio reproduction system 100 according to the present invention in the above configuration will be briefly described.
When appropriate operation information is input from a MIDI input from an IDI device, the audio reproduction system 100 operates according to the input operation information.

More specifically, a MIDI input from the operator 24, the terminal 26 or an external MIDI device as an input means is provided.
When, for example, operation information indicating a reproduction instruction is input from any of the inputs, the audio signal stored in the medium 18 is reproduced, and music and announcements are emitted into space.

At this time, the operator 24 as an input means and the terminal 26
Alternatively, operation information input from a MIDI input from an external MIDI device may be sequentially stored in the medium 18 as operation history information.

Similarly, the self-diagnosis information, the environment information, and the slave information are sequentially stored in the medium 18 as operation history information according to the setting state of the system information described above.

When a request command (to be described later) is transmitted from an external device having a communication function, such as a personal computer, a portable terminal, or a portable telephone, via the first network 102, the request command is transmitted. Then, the system information, operation history information, operation history information, and the like stored in the medium 18 are output from the audio reproduction system 100 and the first network 1
02 is returned to the external device that transmitted the request command.

Therefore, in the audio reproducing system 100, the contents of system information, the contents of operation history information, the contents of operation history information, and the like necessary for investigating the cause when a failure occurs due to a failure or the like are transmitted to the first network. 10
2 can be confirmed in the external device that has transmitted the request command.

Next, details of the processing for storing the operation history information and the operation history information in the medium 18 will be described with reference to the flowcharts of FIGS. After that, the details of the process of transmitting the operation history information, the operation history information, and the like stored in the medium 18 via the first network 102 will be described.

First, when operation information is inputted by the input means (the operation element 24, the terminal 26 and the MIDI input), the operation element 2 is inputted in accordance with the input means to which the operation information is inputted.
4, a routine started when the operation information is input by operating the terminal 4, a routine started when the operation information is input by the terminal 26, and a routine started when the operation information is input by the MIDI input are respectively started. You.

That is, when operation information is input by operating the operation element 24, a routine started when the operation information is input by operating the operation element 24 is started, and a status representing the operation element 24 is displayed. Using the number and the input operation information (input data) as arguments, storage processing of operation history information as a subroutine is executed (see FIG. 3). Then,
A process corresponding to the operation information input by the operation element 24 is performed, and the routine started when the operation element 24 is operated to input the operation information ends.

When operation information is input by a signal from the terminal 26, a routine started when the operation information is input from the terminal 26 is started, and a status number representing the terminal 26 and the input operation are inputted. Using the information (input data) as an argument, storage processing of operation history information as a subroutine is executed (see FIG. 3). Thereafter, a process corresponding to the operation information input by the terminal 26 is performed, and the routine started when the operation information is input by the terminal 26 ends.

On the other hand, when the operation information is input by the MIDI input command, a routine started when the operation information is input by the MIDI input is started.
Using the status number representing the IDI and the input operation information (input data) as arguments, a storage process of operation history information as a subroutine is executed (see FIG. 3). After that, a process corresponding to the operation information input by the MIDI input is performed, and the routine started when the operation information is input by the MIDI input is ended.

In the subroutine of the operation history information storing process shown in FIG. 3, a process of determining whether or not the flag for storing the operation history information is on (S302).

The flag for storing the operation history information can be stored as operation history information as one of the operation history management setting information by input means (operator 24, terminal 26, and MIDI input). If it is set, it is set to ON, and if it is set that the operation information is not stored as the operation history information, it is cleared to OFF.

If the flag for storing the operation history information is off, this subroutine is terminated without performing the processing for storing the operation information as the operation history information. The process returns to the routine that is started when is input.

On the other hand, when the flag for storing the operation history information is on, the status number indicating the input means is provided at the location specified by the write address in the area for storing the operation history information set in the medium 18. And the operation information (input data) together with the time information are written as operation history information (S304).

Next, the write address is advanced by one (S3
06), it is checked whether or not the write address has reached the last address of the area for storing the operation history information (S30).
8) If it has reached, the write address is set to the head address (S310), and if it has not reached, this routine is exited.

Next, FIG. 4 is a flowchart showing a main routine of the operation history information storage processing, and FIGS. 5 and 6 show a subroutine of the operation history information storage processing. A flowchart is shown.

When the main routine for storing the operation history information is started, first, a determination is made as to whether or not a flag for storing the operation history information is ON (S402).

The flag for storing the operation history information is set by the input means (operator 24, terminal 26 and MIDI input) to store the operation history information as one of the operation history management setting information. If it is set to ON, it is cleared to OFF if it is set not to store the operation history information.

Here, when the flag for storing the operation history information is off, the other processing is performed without storing the operation history information (S412), and the process returns to S402.

On the other hand, when the flag for storing the operation history information is ON, the count value of the interval for storing the operation history information is reduced by a certain value (S404).

The count value of the interval at which the operation history information is stored is set as one of the operation history management setting information by the input means (operator 24, terminal 26, and MIDI input).

Next, it is determined whether or not the count value is 0 (S406). If the count value is not 0, other processing is performed without storing the operation history information (S41).
2) Return to the process of S402.

On the other hand, if the count value is 0, a subroutine for storing the operation history information is executed (S40).
8). Details of this subroutine will be described later.

As a result, the operation history information is stored at intervals set by the input means (operator 24, terminal 26, and MIDI input).

Thereafter, the count value is set to a value of a preset interval for storing the operation history information (S410),
Other processes are performed (S412), and the process returns to S402.

Next, the details of the processing for storing the operation history information in S408 will be described with reference to the flowcharts shown in FIGS. 5 and 6. First, a flag for storing the self-diagnosis information indicating the result of the self-diagnosis processing is set. It is determined whether the switch is on (S502).

The flag for storing the self-diagnosis information is stored in the input means (operator 24, terminal 26 and MIDI input) as self-diagnosis information as one of the operation history management setting information. Is set to ON when is set, and is cleared to OFF when it is set not to store the self-diagnosis information as operation history information.

If the flag for storing the self-diagnosis information is on, the sub-routine of the self-diagnosis processing is executed (S504), and the self-diagnosis information indicating the result of the self-diagnosis processing is stored in the medium 18. Writing is performed at the location specified by the write address value on the area for storing the set operation history information (S506), and the process proceeds to S508.

On the other hand, if the flag for storing the self-diagnosis information indicating the result of the self-diagnosis processing is off, the process proceeds to step S508 without performing the self-diagnosis processing.

At S508, a process is performed to determine whether the flag for storing environment information is on.

The flag for storing the environment information is input means (operator 24, terminal 26 and MIDI input).
Thereby, when one of the setting information of the operation history management is set to store the environment information as the operation history information, it is set to ON, and the environment information is set not to be stored as the operation history information. If it is cleared off.

If the flag for storing the environment information is ON, a subroutine for reading the environment information is executed (S510), and the read environment information is stored in the area for storing the operation history information set in the medium 18. Write to the location specified by the write address value above (S51
2), the process proceeds to S514.

On the other hand, if the flag for storing the environment information is off, the environment information is not read out and S
The process proceeds to 514.

In S514, the second network 1
In step S516, it is determined whether or not the slave 108 is connected.
On the other hand, if the slave 108 is not connected, the process proceeds to S522.

In the process of S516, a process for determining whether or not the flag for storing the slave information is on is performed.

The flag for storing the slave information is set by the input means (operator 24, terminal 26 and MIDI input) to store the slave information as operation history information as one of the operation history management setting information. If it is set to ON, it is set to ON, and if it is set not to store the slave information as the operation history information, it is cleared to OFF.

Here, if the flag for storing the slave information is on, the process proceeds to S518, while if the flag for storing the slave information is off, the process proceeds to S522.

In the process of S518, a subroutine for transmitting a command to each of the slaves 108 connected to the second network 106 and reading out the slave information of the slaves 108 is executed.

Then, the read slave information of the slave 108 is written in a location specified by a write address value in an area for storing operation history information set in the medium 18 (S520), and the process proceeds to S522.

In the process of S522, the address is incremented by one with respect to the write address, and the count value of the number of write information is decremented by one.

Thereafter, a determination process is performed to determine whether or not the count value of the number of write information is 0 (S524).

If the count value of the number of write information is not 0, this subroutine is terminated and the process returns to the main routine for storing the operation history information (see FIG. 4).

On the other hand, if the count value of the number of write information is 0, the count value of the number of write information is set to the maximum value of the number of write information, and the write address is set to the value of the preset head address ( In step S526, the sub routine ends, and the process returns to the main routine (see FIG. 4) for storing the operation history information.

Here, when the self-diagnosis information is NG,
By displaying NG on the display 22 according to the self-diagnosis setting information of the system information described above,
From the outside of the audio reproduction system 100, it can be easily determined that the result of the self-diagnosis processing is NG.

Next, measurement of temperature, humidity and power supply voltage as environmental information will be described. First, an output signal from the sensor unit 34 for detecting temperature and humidity and a power supply for detecting power supply voltage The output signal from the voltage level converter 38 is converted into a digital value by the AD converter of the CPU 10 and is temporarily stored in the RAM 16.

The above steps are repeated a predetermined number of times,
An average value of a plurality of digital values stored in the memory 16 is detected as environment information.

The environmental information is not limited to temperature, humidity, and power supply voltage, but may include power supply frequency, atmospheric pressure, shock, vibration, and the like. Various changes such as installation may be performed.

In the plurality of slaves 108,
Similarly to the above-described processing, the operation history information and the operation history information of each slave 108 are stored in each medium (not shown) of the plurality of slaves 108. The operation history information and the operation history information of each slave 108 stored in each medium of the plurality of slaves 108 are periodically transmitted to the master 104 via the second network 106 at predetermined time intervals. Media 18
Are stored in a predetermined area corresponding to the identification number of the slave 108.

Next, a process for transmitting the operation history information and the operation history information stored in a predetermined area of the medium 18 as described above via the first network 102 will be described.

In this audio reproduction system 100,
As the communication setting information of the system information described above, a communication destination (a communication function of a personal computer, a mobile terminal, a mobile phone, or the like capable of performing the two-way communication) is set as the other party performing the two-way communication via the first network 102. The identification number of the external device is set in advance as system information. Then, the audio reproduction system 100 includes the external device (hereinafter, appropriately referred to as “external device”) as the other party.
A request command and a setting command transmitted from the first network 102 via the first network 102 are monitored as needed.

The request command transmitted from the external device includes system information and operation history information (slave 10
8 operation history information. ), A command for requesting transmission of operation history information (including operation history information of the slave 108).

Further, when the command for requesting the audio reproducing system 100 to perform the self-diagnosis processing or the self-diagnosis information indicating the result of the self-diagnosis processing is NG, the result is set to the first.
A command for requesting transmission via the network 102 is also included in the request command.

On the other hand, the setting command transmitted from the external device is the setting and change of the setting contents of the system information of the master 104 and the slave 108 (setting information of operation history management, setting information of operation history management, etc.). Command to perform

Note that, in both the request command and the setting command, for the command specifying the identification number of the slave 108, the slave 108 corresponding to the identification number stored in the management area of the medium 18 of the master 104. Is reached.

Then, a request command designating the identification number of the audio reproduction system 100 from the external device is:
Audio reproduction system 10 via first network 102
0, the sound reproducing system 100 outputs the information corresponding to the received request command to the first network 102 via the master 104 and transmits the information to the external device.

On the other hand, an audio playback system 1 from an external device
When the audio playback system 100 receives the setting command specifying the identification number of 00 via the first network 102, the audio playback system 100 changes information according to the received setting command.

Therefore, the audio reproduction system 1 according to the present invention
At 00, various information such as system information, operation history information, operation history information, and slave information are transmitted and received via the first network 102, and are transmitted from a location different from the facility where the audio reproduction system 100 is located. Remote operation can be realized.

That is, when a malfunction occurs due to a failure or the like, the contents of various information of the audio reproduction system 100 can be grasped from an external device without going to the facility where the audio reproduction system 100 is located. It is possible to confirm a defective portion in the audio reproduction system 100.

Further, it is possible to check the output from various devices, and it is possible to quickly identify a location causing a problem.

Further, by confirming the operation history information and the operation history information, a process in which the audio reproduction system 100 has failed can be clarified. Therefore, whether the failure is an operational problem of the audio reproduction system 100, or It is possible to easily determine whether the problem is due to the various devices constituting the audio reproduction system 100 itself, and there is no need to perform a reproduction experiment.

As described above, in the audio reproduction system 100, when the audio reproduction system 100 fails, the audio reproduction system 10 can be remotely operated without going to the facility where the audio reproduction system 100 is located.
Because it is possible to grasp the situation of zero, before going to the facility, consider the countermeasures beforehand, go to the facility as needed,
Alternatively, it is possible to flexibly cope with a defect, such as instructing a worker at the facility to point to a defect location by an operator of an external device not at the facility,
Repair work of the audio reproduction system 100 can be performed efficiently.

Further, in the audio reproducing system 100, by confirming the contents of various information of the audio reproducing system 100 from an external device by remote control, when a defect occurs due to a failure or the like, it is only necessary to confirm a defective portion. Instead, for example, a setting change operation, a setting confirmation operation, an audio signal exchange operation, and the like can be performed, and the setting management of the audio reproduction system 100 can be performed by remote control.

The above-described embodiment can be modified as shown in the following (1) to (4).

(1) In the above embodiment, the contents of the operation history information and the contents of the operation history information are displayed in a graph on the display 22 of the audio reproduction system 100, and the contents of the various kinds of information are used to display a defect. The generated device may be specified and displayed.

In this way, it is possible to visually confirm changes in the surrounding environment and the current state of the audio reproduction system 100, and it is possible to more efficiently confirm a defective portion.

Further, the information displayed on the display 22 of the audio reproduction system 100 as described above is graphically displayed on the display of an external device which is remotely operated, so that the operation and management can be performed visually. Good.

(2) In the above embodiment, various information such as audio data, operation history information, and operation history information are stored in the medium 18 of the audio reproduction system 100. However, the present invention is not limited to this. Needless to say, various kinds of information such as the audio data, the operation history information, and the operation history information are transmitted to the outside of the audio reproduction system 100 via the first network 102, and stored outside the audio reproduction system 100. You may make it memorize | store in an apparatus.

(3) In the above-described embodiment, a plurality of masters 104 of a plurality of audio reproduction systems can be connected to the first network 106, and the plurality of audio reproduction systems can be remotely controlled by one external device. In addition to the above, various information of a plurality of audio reproduction systems can be shared to realize efficient use and repair.

(4) The above embodiments and the modifications shown in (1) to (3) above may be appropriately combined.

[0108]

As described above, the present invention is constructed as described above. Therefore, when a failure occurs in the audio reproduction system due to a failure or the like, the user goes to the facility where the audio reproduction system is located or performs a reproduction experiment. This makes it possible to quickly identify the cause of the trouble without performing the process, and to find out the process that caused the trouble.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an audio reproducing system according to an example of an embodiment of the present invention.

FIG. 2 is a block diagram showing an example of a master configuration of the audio reproduction system shown in FIG. 1;

FIG. 3 is a flowchart illustrating a storage process of operation history information.

FIG. 4 is a flowchart showing a main routine of a process of storing operation history information.

FIG. 5 is a flowchart showing a subroutine of a process of storing operation history information.

FIG. 6 is a flowchart showing a subroutine of a process of storing operation history information.

[Explanation of symbols]

10 CPU 12 Data bus 14 Read only memory (ROM) 16 Random access memory (RA
M) 18 media 20 communication device 22 display 24 operator 26 terminal 28 gate array 30 analog / digital (AD) converter 32 digital / analog (DA) converter 34 sensor section 36 absolute value detection circuit section 38 power supply voltage level conversion section Reference Signs List 100 audio reproduction system 102 first network 104 master 106 second network 108, 108-1, 108-2, 108-n
Slave 110 Mixer 112 Audio amplifier 114L, 114R Speaker

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masamitsu Ichikawa 1-4-16 Dojimahama, Kita-ku, Osaka-shi, Osaka F-term in Roland Corporation (reference) 5D020 AC01 5D045 AB21

Claims (2)

[Claims] 1. An audio reproduction system for reproducing an audio signal, comprising: a plurality of input means for inputting operation information for causing the audio reproduction system to perform a desired operation; An audio reproduction system comprising: a storage unit that stores operation history information indicating a history of operation information input by the input unit provided in the reproduction unit; and an output unit that outputs the operation history information stored in the storage unit. 2. An audio reproduction system for reproducing an audio signal, wherein: a storage means for storing at least operation history information indicating a history of operation information indicating an operation state of the audio reproduction system itself; and an operation history stored in the storage means. And an output unit for outputting information.