JPH11252682A - Acoustic system, method for checking connection state of the acoustic system, and recording medium recording connection state confirming program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relieve the processing load when power is supplied by detecting which sound device receives a digital signal at first in the lump. SOLUTION: A center unit 1 selects sequentially sound source devices 2-6 one by one and outputs a confirmation digital signal to a selected sound device. A DSP unit 7 seeks the confirmation digital signal from pluralities of digital signal input sections 15-18. In the case that the confirmation digital signal is found out by any digital signal input section, the DSP unit 7 stores it that a selected sound device connects to the digital signal input section in terms of a digital signal. In the case that no confirmation digital signal is found out in any digital signal input section, the DSP unit 7 stores it that the selected sound source device connects to the input section in terms of an analog signal. The sound source is selected simply and quickly by using the stored information in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an acoustic system in which a plurality of sound source devices are connected, and more specifically, by detecting which sound source device is digitally connected at once. , Processing during power-on is reduced.

[0002]

2. Description of the Related Art As a sound system such as a car audio system, there is known a sound system in which a desired one of several connected sound source devices can be selected as a sound source of a speaker. In this type of sound system, for example, some sound source devices such as a CD player and an MD player are provided with a DSP.
(Digital sound processor) Connected to a processing device such as a unit. Then, a signal from a desired sound source device is selected by a selector in the processing device, and the selected signal is sent to a speaker via an amplifier.

Such a processing unit has several digital signal input terminals in addition to an analog signal input unit such as an AUX terminal, and a sound source device capable of outputting a digital signal is provided with a digital signal input terminal via a cable such as an optical fiber. The sound source device which is digitally connected to the unit and which can output only an analog signal is analog-connected to the analog signal input unit.

When the sound source of the speaker is switched from the currently reproduced sound source device to another sound source device, the processing device side receives signals from some digital or analog input units. The input section that came was selected.

That is, some sound source devices having the same function of reproducing a CD can output digital data such as an optical fiber depending on the model, while others can output only analog data. Even if there are several digital signal input units on the side of the processing device that connects the sound source devices, the shape of the connectors and the like are the same, and it is not always determined which sound source device is connected to which digital signal input unit by the user. Not. For this reason, conventionally, it was not possible to grasp from the sound system side which connection state such as which sound source device is digitally connected, and specifically, which digital signal input unit is connected. .

As a result, in the conventional audio system, the digital signal is input by always checking whether or not the digital signal is input to each digital signal input unit at a fixed time interval during power-on. The digital signal input unit is selected as a sound source to be output from a speaker, and when no digital signal is input to any of the digital signal input units, the analog signal input unit is selected as a sound source.

[0007]

However, constantly monitoring a number of digital signal inputs during power-on not only complicates processing but also burdens the system. Further, depending on the state of operation such as electric noise, the presence or absence of a signal may be erroneously detected, and a wrong input unit may be selected.

The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and its object is to first detect collectively which sound source device is digitally connected. That is, processing during power-on is reduced.

[0009]

In order to achieve the above object, the invention according to claim 1 has a plurality of sound source devices, and a processing device that receives and processes signals from the sound source devices,
In the acoustic system having a plurality of digital signal inputs for receiving a digital signal from the sound source device, the processing device is configured to sequentially select the sound source devices one by one, and to provide a digital signal for confirmation to the selected sound source device. Means for outputting a digital signal for confirmation from the plurality of digital signal input units, and when a digital signal for confirmation is found in any of the digital signal input units, the selected sound source device is Means for storing that the digital signal is input to the digital signal input section, and if no digital signal for confirmation is found in any digital signal input section, the selected sound source apparatus is analog-connected to the processing apparatus. Means for storing the fact that According to a fourth aspect of the present invention, there is provided the invention of the first aspect, which has a plurality of sound source devices, and a processing device that receives and processes signals from the sound source devices. In the method for checking the connection state of an acoustic system having a plurality of digital signal inputs for receiving digital signals from the sound source device, a step of sequentially selecting the sound source devices one by one, Outputting a digital signal; searching for a confirmation digital signal from the plurality of digital signal inputs; and, when a confirmation digital signal is found in any of the digital signal inputs, selecting a sound source. The device stores the digital connection at its digital signal input, and checks the digital signal at any digital signal input for confirmation. If no from, are selected tone generator, characterized in that it comprises the steps of: storing that it is an analog connection to the processing apparatus. According to a fifth aspect of the present invention, the invention of the first aspect is grasped from the viewpoint of a recording medium storing a computer program, and includes a plurality of sound source devices and a processing device that receives and processes signals from the sound source devices. The processing device records the connection state of a sound system having a plurality of digital signal input units for receiving digital signals from the sound source device, and a connection state confirmation program of the sound system for checking using a computer. In a medium, the program causes the computer to sequentially select sound source devices one by one, output a digital signal for confirmation to the selected sound source device, and output the digital signal for confirmation from the plurality of digital signal input units. When a digital signal for confirmation is found at any of the digital signal input sections, the selected sound source device The digital signal input section stores that the digital connection is made, and if a digital signal for confirmation is not found in any digital signal input section, the selected sound source apparatus is analog-connected to the processing apparatus. Is stored. The invention according to claim 2 includes a main device for switching sound sources, a plurality of sound source devices, and a processing device that receives and processes signals from each of the sound source devices, wherein the processing device is configured to transmit digital signals from the sound source devices. In a sound system having a plurality of digital signal inputs for receiving signals and an analog signal input for receiving analog signals from the sound source device, the main device sequentially selects the sound source devices one by one. Means for sending a command to the selected sound source device to output a digital signal for confirmation, and means for sending identification information representing the selected sound source device to the processing device, the sound source device Is configured to output a digital signal for confirmation to the processing device when receiving the command, and the processing device, when receiving the command, Means for searching for a digital signal for confirmation from the number of digital signal input sections, and when a digital signal for confirmation is found in any of the digital signal input sections, the sound source device represented by the identification information is connected to the digital signal input section. Means for storing that the digital connection is made;
Means for storing that the sound source device represented by the identification information is analog-connected to the processing device when a digital signal for confirmation is not found in any digital signal input section. . Claims 1, 2,
In the inventions of the fourth and fifth aspects, a digital signal for confirmation is output from each of the sound source devices, and the processing device searches for a digital signal input section to which the digital signal is input.
It is known to which digital signal input section the sound source device is digitally connected, and if no digital signal is found, it is known that the sound source device is analog-connected to the analog signal input section. In this way, when the user connects the sound source device and constructs the system or when the power is turned on, if the connection state is detected and stored collectively, when the sound source device is switched, which input unit Whether to select a signal can be determined from the stored information. For this reason, it is not necessary to constantly monitor the digital signal input section while the power is on, so that useless processing can be omitted and the reliability of the system can be improved.

According to a third aspect of the present invention, in the acoustic system according to the second aspect, when the sound source is switched to a new sound source device, the new sound source device is switched based on the information stored by the storage unit. Means for checking which of the plurality of digital signal input units or the analog signal input units is connected to the input unit, and means for selecting, as a sound source, an input unit to which the new sound source device is connected. Features.

According to the third aspect of the present invention, when the sound source is switched to a new sound source device, it is easy to determine which input unit should be used as the sound source from information stored in advance, so that the switching can be performed quickly and accurately.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. In each drawing used in the description, the description of the same or similar members as those described earlier is omitted.

[1. Configuration] [1-1. Overall Configuration] In the present embodiment, as shown in the overall configuration diagram of FIG. 1, a center unit 1, a plurality of tone generators 2 to 6, such as a CD player and an MD player, and a DSP unit 7 are connected to a bus 8, a digital This is an acoustic system connected by optical fibers 9 to 12 for transmitting signals and an analog audio line 13 for transmitting analog signals.

The center unit 1 is a device for switching a sound source to be sent to a speaker to a desired one of the sound source devices 2 to 6 in accordance with an instruction given by an operation switch, voice recognition, or the like. Equivalent to "main equipment". Each of the sound source devices 2 to 6 is a device that provides a signal serving as a sound source flowing from a speaker, such as a radio tuner, a CD player, and an MD player. Also, DS
The P unit 7 is a device that performs a process of receiving a signal from each of the sound source devices 2 to 6 and flowing the signal to a speaker, and corresponds to a “processing device” in the claims.

The center unit 1 and the sound source device 2
6 and the DSP unit 7 are connected by a bus 8 for transmitting a control signal such as a command. The bus 8 is connected to the bus input / output unit 19 of the DSP unit 7, for example.
It is connected to the. The DSP unit 7 includes a plurality of digital signal input units 15 to 18 for receiving digital signals from a sound source device. The sound source devices 2 to 5 capable of digital output output the digital signals through optical fibers 9 to 12, respectively. It is connected to each of the signal input units 15 to 18. Also, the DSP unit 7 has an analog signal input unit 14 for receiving an analog signal from the sound source device.
Sound source device 6 that can only output analog signals
Are connected to the analog signal input section 14 via an analog audio line 13.

[1-2. Configuration of DSP unit]
FIG. 2 shows a detailed configuration of the DSP unit 7. Since the drawings of the present application are conceptual, for example, in FIGS. 1 and 2, the direction in which the optical fibers are connected to the digital signal input units 15 to 18 is different, but the configuration of the same DSP unit 7 is different. This is what is explained in the section.

That is, as shown in FIG. 2, the DSP unit 7 includes signal input units 14 to 18 and a bus input / output unit 1.
9, an A / D conversion circuit 71 and a first selector 72
, A second selector 73, a control microcomputer 74, and a DSP (digital sound processor) I.
A C75 and a D / A conversion circuit 76 are provided.

The A / D conversion circuit 71 is an analog-to-digital conversion circuit.
This is a circuit for converting an analog signal input from a digital camera into a digital signal. The first selector 72 is a part that switches between using a sound source output from a speaker as a sound source input as an analog signal or a sound source input as a digital signal. Also, the second selector 73
Is a part for switching which of the digital signal input units 15 to 18 is to use a digital signal when a digital signal is used as a sound source of a speaker.

A control microcomputer 74
Is a means for controlling the operation of the entire DSP unit 7, and exchanges information such as commands with the outside through the bus input / output unit 19, checks the state of the digital signal input units 15 to 18 to search for digital signals, By controlling the first selector 72 and the second selector 73, processing for switching the sound source of the speaker is performed.

The DSP IC 75 is an integrated circuit for performing digital processing related to sound, and converts a digital signal read from a pit pattern such as a CD into a standard such as a predetermined sampling frequency and a predetermined number of quantization bits. Based on the calculation based on this, processing such as conversion into a numerical value representing the height of the sound wave is performed. The D / A conversion circuit 76 is a digital-analog conversion circuit,
This is a circuit for creating an analog electric sound signal from a numerical value representing, for example, the sound wave height calculated by the SP IC 75.

Although not shown in FIG. 1, an external amplifier 31 and a speaker 32 are connected to the DSP unit 7 (FIG. 2). Plays a role as sound.

[1-3. Functions of Center Unit] Next, the functions of the center unit 1 and the DSP unit 7 shown in FIG. 1 will be described with reference to FIG. That is, the center unit 1, the sound source devices 2 to 6, D
The various functions of the SP unit 7 are actually realized by controlling the microcomputers mounted on the respective units by software such as an embedded program.

In this case, what kind of CPU is used,
What kind of programming system to use, software to be recorded on ROM chip, CD-ROM
There are various possible configurations, such as reading from a recording medium and executing the program. Therefore, in FIG. 3, the present embodiment will be described using virtual circuit blocks each performing a certain function.

That is, as shown in FIG. 3, the center unit 1 includes a selector 11 for selecting a sound source device in addition to a changeover switch (not shown) for switching the sound source.
1, a unit 112 for outputting a digital signal, and a unit 113 for designating a sound source device. They are,
This is a part used to check how each of the sound source devices 2 to 6 is connected to the DSP unit 7. Among these, the means 111 for selecting a sound source device is connected to any of the input units 14 to 18 of the DSP unit 7. This is a means for sequentially selecting the sound source devices 2 to 6 one by one in order to check whether or not the sound sources have been played.

Means 11 for outputting a digital signal
Numeral 2 is a means for outputting a digital signal for confirmation by sending a command to the selected sound source device. In response to this, the sound source device capable of digital output is configured to output a digital signal for confirmation to the DSP unit 7 when receiving this command. Means 113 for specifying a sound source device
Is a means for designating which sound source device should be checked for connection by sending identification information such as a device number indicating the selected sound source device to the DSP unit 7.

The center unit 1 has a means 114 for receiving a switching instruction and a means 115 for stopping the sound source device.
And a means 116 for activating the sound source device, and means 117 for instructing switching. These are the parts used to switch the sound source when the acoustic system is actually used. Among them, the means 114 for receiving the switching instruction is a part for receiving the user's instruction for the sound source switching from the above-mentioned switch or the like. It is.

The means 115 for stopping the sound source device is a portion for stopping the selected sound source device by sending a stop command or the like. The means 116 for activating the sound source device sends a performance start command or the like,
This is a part that causes the tone generator newly selected by the switching to start outputting a signal. The means 117 for instructing switching is
This is a means for designating the DSP unit 7 which sound source device is newly selected, and switching the sound source to be played from the speaker to the signal sent from the sound source device.

[1-4. Function of DSP unit]
The functions realized by the control microcomputer 74 in the DSP unit 7 are as follows. That is, the DSP unit 7, as shown in FIG.
A means 741 for searching for a digital signal, a means 742 for storing a digital connection, and a means 743 for storing an analog connection
And These are the parts used when checking how the tone generators 2 to 6 are connected to the DSP unit 7 in cooperation with the center unit 11.

Means 741 for searching for a digital signal
Means 11 for specifying the sound source device of the center unit 1
When the identification information indicating the sound source device is received from 3,
This is a section for searching for a digital signal for confirmation from the plurality of digital signal input sections 15 to 18. Further, the means 742 for storing the digital connection indicates that, when a digital signal for confirmation is found in any of the digital signal input sections 15 to 18, the sound source device indicated by the identification information is connected to the digital signal input section by the digital connection. This is the part that memorizes what is being done.

Means 743 for storing analog connections
Is a part for storing that the sound source device indicated by the identification information is analog-connected to the DSP unit 7 when a digital signal for confirmation is not found in any of the digital signal input units 15 to 18. As described above, which sound source device is digitally connected to which input unit and which sound source device is analogly connected are stored in the memory of the control microcomputer 74 as connection state information 744. .

The DSP unit 7 includes a unit 745 for checking the connection state and a unit 746 for selecting an input. These are the parts used when switching the sound source of this acoustic system in cooperation with the center unit 1. Among them, the means 745 for examining the connection state sends the sound source from the means 17 for instructing the center unit 1 to switch to a new sound source. When an instruction to switch to the device is received, the specified new sound source device is connected to any one of the plurality of digital signal input units 15 to 18 or the analog signal input unit 14 based on the connection state information 744. This is the part to check if it has been done. In addition, as a result of the examination, the input selector 746 selects the input unit, to which the specified sound source device is found to be connected, as the sound source to be output from the speaker, by using the first selector 72 and the second selector 72. This is a part for controlling the selector 73.

[2. Operation and effect) In this acoustic system having the above-described configuration, as described in detail below, it is necessary to first collectively check which sound source device is connected to which input unit, and then switch the source. Can be processed easily and quickly.

[2-1. Processing for Detecting Connection State] First, this acoustic system is composed of a center unit 1 and a DSP.
By obtaining and connecting to the unit 7 a sound source device of the type that the user needs, various configurations can be made depending on the user. When the user first turns on the power after assembling the system, or every time the power is turned on, the sound system changes the connection state of which sound source device is connected to which input unit. Find out like. The procedure for checking the connection state is shown in the flowchart of FIG.

[2-1-1. Transmission of carrier signal output command] That is, first, in the center unit 1, the means 111 for selecting a sound source device has not yet checked the connection state from among several sound source devices 2 to 6 connected to the system. Choose one. For example, when the sound source device 2 is selected, the means 111 for selecting the sound source device sets 2 which is the number of the sound source device to a variable N (step 11). Subsequently, the means 112 for outputting a digital signal of the center unit 1 sends a carrier signal output command via the bus 8 to the tone generator N, in this case, the tone generator 2 (step 12).

Here, the "carrier signal output command"
Is a command for outputting a carrier signal used for signal transmission as a digital signal for confirmation from a digital signal output unit of the sound source device. Upon receiving the carrier signal output command, the sound source device N, in this case, the sound source device 2 outputs the carrier signal to the optical fiber 9 and, at the same time, notifies the center unit 1 via the bus 8 of the completion of the carrier signal output (step 13). ).

[2-1-2. Designation of sound source device)
Means 113 for specifying sound source device of center unit 1
Specifies the tone generator outputting the carrier signal to the means 741 for outputting the digital signal of the DSP unit 7 via the bus 8, and notifies the reading permission of the carrier signal. In other words, the center unit 1 notifies the DSP unit 7 to which sound source device the carrier signal output command has been sent by attaching the identification number of the sound source device to the reading permission (step 14).

[2-1-3. Detection of Digital Signal] Upon receiving this notification, the means 741 for searching for a digital signal of the DSP unit 7 examines the digital signal input sections 15 to 18 to see whether the digital signals are sequentially input. Specifically, means 741 for searching for a digital signal
First, for example, a number 15 representing the digital signal input unit 15 is set to a variable P (step 15), and it is checked whether a digital signal is input to the digital signal input unit P, here, the digital signal input unit 15 (step 15). 1
6).

At this time, the sound source device outputting the carrier signal is a sound source device designated by the center unit 1 to be permitted to read. Therefore, when a digital signal is detected at the examined digital signal input portion P (step 17), the sound source device designated by the center unit 1 is connected to the digital signal input portion P by digital connection. It is recorded in the memory as having been performed (step 18), and the process proceeds to step 21.

On the other hand, when the digital signal input section P does not detect a digital signal, the means 741 for searching for a digital signal uses the specified sound source device N as the DSP unit 7.
Is recorded in the memory that the analog connection is made (step 19). Then, all the digital signal input units 15-1
It is determined whether or not the inspection has been completed for step 8 (step 20). If there is any remaining unchecked, the number of the next digital signal input section, for example, the next 16 of 15, is set in the variable P to determine whether there is a signal. (Step 1)
6).

In the loop of steps 16 to 20,
Since the result of checking the digital signal is overwritten, for example, if a digital signal is not found at the first digital signal input unit 15, the result is temporarily recorded as an analog connection for the sound source device. However, when a digital signal is found at the next digital signal input section 16, the result that the digital signal input section 16 is digitally connected to the same sound source device is overwritten.

Then, the subsequent processing skips step 20 and proceeds to step 21, so that a digital signal cannot be found in the next digital signal input section 17, for example, and the analog signal is not overwritten. That is, when the process proceeds to step 21, the result of the specified sound source device becomes an analog connection only when a digital signal cannot be found in any of the digital signal input units 15 to 18.

[2-1-4. Processing of Next Sound Source Apparatus] When the processing has proceeded to step 21, it is known how the designated sound source apparatus is connected to the DSP unit 7, and for example, the digital signal of the DSP unit 7 is The searching means 741 notifies the means 113 for specifying the tone generator of the center unit 1 via the bus 8 that the reading of the carrier signal has been completed (step 2).
1). This notification means that the connection state of the specified sound source device has been checked.

In the center unit 1 which has received this notification, the means 112 for outputting a digital signal is transmitted via the bus 8 to the tone generator 2 which has transmitted the carrier signal output command.
, A command to stop the carrier signal is sent (step 22).

When a series of processing in steps 12 to 22 is completed for the sound source device 2, the means 111 for selecting the sound source device of the center unit 1 determines whether or not all the sound source devices have been tested (step 23). If not, the next sound source device, for example, the number 3 of the sound source device 3 next to the sound source device 2 is set in the variable N, and the processing from step 12 is repeated in the same manner as described above.

As described above, by sequentially repeating the procedure for all the tone generators,
Information indicating which sound source device is digitally connected to which digital signal input unit, that is, connection state information 74
4 is created, and the detection of the connection state ends.

[2-2. Processing when Switching Sources] In the state where the state of the digital connection is recorded as described above, switching of the sound source (hereinafter, referred to as “source”) can be easily and quickly performed as follows. Here, the procedure for switching the source is shown in the flowchart of FIG.

[2-2-1. Processing in Center Unit] In this procedure, it is assumed that the user first specifies a source other than the currently reproduced source by performing a key operation or the like on the center unit 1 (step 31). This instruction is a means 11 for receiving a switching instruction.
Means 115 for stopping the sound source device, received by
Sends a playback stop command via the bus 8 to the currently selected sound source device that is playing back a CD or the like (step 32).

Subsequently, means 116 for activating the sound source device
Transmits a performance start command, that is, a command to start outputting a signal of a sound reproduced from an MD or the like, via the bus 8 to the newly selected sound source device (step 33). Further, means 117 for instructing switching is provided by DS
For the means 745 for checking the connection state of the P unit 7,
A command for switching the sound source is transmitted by designating which sound source device is newly selected (step 34).
At this time, in order to specify the sound source device, data identifying the sound source device, such as the identification number of the sound source device, may be attached to the command.

[2-2-2. Processing in DSP unit]
The means 745 for checking the connection state of the DSP unit 7 which has received this command searches for the connection state information 744 recorded in the memory when the digital connection is detected, so that Whether or not there is a digital signal input unit can be easily determined (step 35).

At this time, if there is a digital signal input unit corresponding to the designated sound source device (step 36), the means 746 for selecting an input switches the first selector 72 to the digital side, that is, from the second selector. By controlling to receive the output (step 37), the sound source of the speaker is switched to a digital signal. Means 74 for selecting an input
6 controls the second selector 73 to receive a signal from the digital signal input unit that has been found by the search to be connected to the designated sound source device (step 38), and The digital signal from the device is the first
To the selector 72.

On the other hand, as a result of searching the connection state information 744, if it is found that there is no digital signal input section corresponding to the specified sound source device and the specified sound source device is analog-connected (step 36). The means 746 for selecting the input controls the first selector 72 to the analog side (step 39), so that the analog signal input from the analog signal input unit 19 is used as the sound source of the speaker.
PIC75 or the like.

[2-3. Effects] As described above, in the present embodiment, a digital signal for confirmation is output from each sound source device, and the processing device side searches for a digital signal input unit to which the digital signal is input, thereby The sound source device knows to which digital signal input section the digital connection is made, and if no digital signal is found, it can be understood that the sound source device is analog connected to the analog signal input portion.

In this way, when the user connects the sound source device to construct the system or when the power is turned on, the connection state is detected and stored at once, so that the sound source can be changed to a new sound source device. At the time of switching, which input unit signal should be selected can be easily determined from information stored in advance. For this reason, the switching can be performed quickly and accurately while the useless processing is omitted without always monitoring the digital signal input unit while the power is on, and the reliability of the system is improved.

[3. Other Embodiments] The present invention is not limited to the above embodiments, but includes other embodiments as exemplified below. For example, the type and number of sound source devices are arbitrary, and the configuration of a processing device that receives a signal from the sound source device and processes the signal is not limited to that described in the above embodiment. For example, the number of digital signal input units can be freely changed, and a plurality of analog signal input units can be provided.

To output a digital signal for confirmation to the selected sound source device, it is not always necessary to send a command. For example, the digital signal may be output to the sound source device at a predetermined timing. Further, a recording medium on which a computer program for realizing the functions of the present invention is recorded is also one embodiment of the present invention.

[0056]

As described above, according to the present invention, it is possible to reduce processing during power-on and to easily switch sound sources by first detecting which sound source device is digitally connected at once. Can be done fast.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of the present invention.

FIG. 2 is a functional block diagram showing a detailed configuration of a DSP unit according to the embodiment of the present invention.

FIG. 3 is a functional block diagram showing functions of a center unit and a DSP unit according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a procedure for checking a connection state of the acoustic system in the embodiment of the present invention.

FIG. 5 is a flowchart showing a procedure for switching sound sources (sources) in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Center unit 111 ... Means for selecting a sound source device 112 ... Means for outputting a digital signal 113 ... Means for specifying a sound source device 114 ... Means for receiving a switching instruction 115 ... Means for stopping a sound source device 116 ... Means for starting a sound source device 117 means for instructing switching 2-6 sound source device 7 DSP unit 7 71 A / D conversion circuit 72 first selector 73 second selector 74 control microcomputer 741 means for searching for digital signals 742: means for storing digital connections 743: means for storing analog connections 744: connection state information 745: means for examining connection states 746: means for selecting inputs 75 ... DSP IC 76 ... D / A conversion circuit 768 ... bus 9-12: Optical fiber 13: Analog audio line 14: Analog signal input unit 15 18 ... digital signal input section 19 ... bus input-output unit 19 31 ... external amplifier 32 ... speaker

Claims (5)

[Claims] An electronic device comprising: a plurality of sound source devices; and a processing device that receives and processes signals from the sound source device, wherein the processing device includes a plurality of digital signal input units for receiving digital signals from the sound source devices. Means for sequentially selecting sound source devices one by one, means for outputting a digital signal for confirmation to the selected sound source device, and searching for a digital signal for confirmation from the plurality of digital signal input units. Means for storing, when a digital signal for confirmation is found at any of the digital signal inputs, that the selected sound source device is digitally connected to the digital signal input; If a digital signal for confirmation is not found in the input unit, it is determined that the selected sound source device is analog-connected to the processing device. Sound system characterized by comprising: means for 憶, the. 2. A sound processing apparatus comprising: a main device for switching sound sources; a plurality of sound source devices; and a processing device for receiving and processing a signal from each of the sound source devices. In a sound system including a plurality of digital signal input units for receiving and an analog signal input unit for receiving an analog signal from the sound source device, the main device includes: a unit that sequentially selects one sound source device; Means for sending a command to output a digital signal for confirmation to the selected sound source device; and means for sending identification information representing the selected sound source device to the processing device. When receiving the command, the processing device is configured to output a digital signal for confirmation to the processing device, the processing device, when receiving the command, the Means for searching for a digital signal for confirmation from a number of digital signal input sections; and when a digital signal for confirmation is found in any of the digital signal input sections, the sound source device represented by the identification information is connected to the digital signal input section. Means for storing that the digital connection is made, and storing that the sound source device represented by the identification information is analog-connected to the processing device when a digital signal for confirmation is not found in any digital signal input section. A sound system comprising: 3. When the sound source is switched to a new sound source device, the new sound source device is selected from the plurality of digital signal input units or the analog signal input units based on information stored by the storage unit. 3. The acoustic system according to claim 2, further comprising: a unit configured to determine which input unit is connected, and a unit configured to select, as a sound source, the input unit connected to the new sound source device. 4. A plurality of sound source devices, and a processing device for receiving and processing signals from the sound source device, wherein the processing device includes a plurality of digital signal input units for receiving digital signals from the sound source device. In the method for examining the connection state of the sound system having, a step of sequentially selecting sound source devices one by one, a step of causing the selected sound source device to output a digital signal for confirmation, a step of confirming from the plurality of digital signal input units Searching for a digital signal for use, and when a digital signal for confirmation is found at any of the digital signal input sections, the fact that the selected sound source device is digitally connected to the digital signal input section is stored. Step, if no digital signal for confirmation is found in any digital signal input section, the selected sound source device is How to determine the connection state of the sound system, which comprises a step of storing that it is an analog connection sense device. 5. A plurality of sound source devices, and a processing device for receiving and processing signals from the sound source device, wherein the processing device includes a plurality of digital signal input units for receiving digital signals from the sound source device. A recording medium for recording a connection state confirmation program of an acoustic system for examining the connection state of the acoustic system using a computer using the computer. The program causes the computer to select sound source devices one by one in order. A digital signal for confirmation is output to the sound source device that is being searched, and a digital signal for confirmation is searched for from the plurality of digital signal input sections.If a digital signal for confirmation is found in any of the digital signal input sections, The selected sound source device is stored in the digital signal input section so that the digital connection is made. In the case where no digital signal for confirmation was also found in the section, the selected sound source device recorded a connection state confirmation program of the acoustic system, which stores that the processing device is connected in analog. recoding media.