Sound processing method, sound processing system, and acoustic device

Abstract

To provide a sound processing method, a sound processing system, and an interface device, capable of preventing output of sounds from being stopped.SOLUTION: In a sound processing method, a sound device receives a first sound signal from a first sound processor, the sound device generates a second sound signal on the basis of the first sound signal, and the sound device transmits the second sound signal to a second sound processor. The second sound processor performs signal processing to the second sound signal to generate a third sound signal. The sound device receives the third sound signal from the second sound processor. The sound device checks a state of the second sound processor on the basis of a signal received from the second sound processor, transmits a fourth sound signal based on the third sound signal to the first sound processor when determining that the state of the second sound processor is normal, and generates a fifth sound signal on the basis of the first sound signal or the second sound signal to be transmitted to the first sound processor when determining that the state of the second sound processor is abnormal.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a sound processing method, a sound processing system, and an acoustic device. [Background technology]

[0002] Non-Patent Document 1 discloses an effector experiment service system that uses the Internet to enable users to try out effectors without going to a music store.

[0003] The client in Patent Document 1 receives a musical instrument sound signal from a sound board 1a, which is an acoustic device, and transmits it to an effector server 3. A group of effectors 4 is connected to the effector server 3. The effector server 3 plays back the sound data received from the client via the Internet 2 and modulates it using the group of effectors 4. The effector server 3 sends the modulated sound data to the client. The client receives the modulated sound data and provides sound from a speaker connected to the sound board 1a. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-085148 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the effector experiment service system of Patent Document 1, if there is some kind of malfunction in the effector server 3, the client cannot receive sound data from the effector server 3. As a result, the effector experiment service system may not be able to provide sound from the speaker.

[0006] Therefore, an object of one embodiment of the present invention is to provide a sound processing method, a sound processing system, and an interface device that prevent the provision of sound from being stopped. [Means for solving the problem]

[0007] The sound processing method includes an acoustic device receiving a first sound signal from a first sound processing device, the acoustic device generating a second sound signal based on the first sound signal, the acoustic device transmitting the second sound signal to a second sound processing device, the second sound processing device generating a third sound signal by performing signal processing on the second sound signal, the acoustic device receiving the third sound signal from the second sound processing device, the acoustic device checking a state of the second sound processing device based on the signal received from the second sound processing device, and if it determines that the state of the second sound processing device is normal, transmitting a fourth sound signal based on the third sound signal to the first sound processing device, and if it determines that the state of the second sound processing device is abnormal, generating a fifth sound signal based on the first sound signal or the second sound signal and transmitting the fifth sound signal to the first sound processing device. [Effects of the Invention]

[0008] A sound processing method according to an embodiment of the present invention can prevent the provision of sound from being stopped. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a block diagram showing the configuration of a sound processing system 1. FIG. [Figure 2] FIG. 2 is a block diagram showing the configuration of a mixer 11. [Figure 3] FIG. 2 is a block diagram showing the configuration of an interface device 12. [Figure 4] 2 is a functional block diagram showing the flow of processing of a sound signal in a mixer 11. FIG. [Figure 5] FIG. 2 is a block diagram showing the configuration of an interface device 12. [Figure 6] FIG. 2 is a block diagram showing the configuration of an information processing terminal 16. [Figure 7] 1 is a functional block diagram showing the flow of sound signals in plug-in effect processing in a mixer 11, an interface device 12, and an information processing terminal 16. FIG. [Figure 8] 10 is a flowchart showing the operations of the mixer 11, the interface device 12, and the information processing terminal 16. [Figure 9] FIG. 2 is a diagram showing the structure of one sample of sound data. DETAILED DESCRIPTION OF THE INVENTION

[0010] 1 is a block diagram showing the configuration of a sound processing system 1. The sound processing system 1 includes a mixer 11, an interface device 12, a network 13, a plurality of speakers 14, a plurality of microphones 15, and an information processing terminal 16. The mixer 11 is an example of a first sound processing device of the present invention, and the information processing terminal 16 is an example of a second sound processing device of the present invention. The interface device 12 is an example of an acoustic device of the present invention.

[0011] The mixer 11 and the interface device 12 are connected via a network cable. The interface device 12 is connected via an audio cable to a plurality of speakers 14 and a plurality of microphones 15. The interface device 12 is also connected via a USB (Universal Serial Bus) cable.

[0012] However, in the present invention, the connection between devices is not limited to this example. For example, the mixer 11 and the interface device 12 may be connected by an audio cable. Also, the interface device 12 and the information processing terminal 16 may be connected via a network or via an audio cable.

[0013] Fig. 2 is a block diagram conceptually showing the flow of sound signals. As shown in Fig. 2, mixer 11 receives sound signals from each of multiple microphones 15. For the sake of explanation, Fig. 2 shows mixer 11 receiving sound signals directly from microphones 15, but in reality mixer 11 receives sound signals from microphones 15 via interface device 12.

[0014] The mixer 11 performs signal processing such as effect processing and mixing processing on the sound signals received from the multiple microphones 15. The mixer 11 transmits the processed sound signals to each of the multiple speakers 14. For the sake of explanation, FIG. 2 shows the mixer 11 receiving the sound signals directly from the speakers 14, but in reality, the mixer 11 receives the sound signals at the speakers 14 via the interface device 12.

[0015] The mixer 11 performs plug-in effect processing as an example of signal processing on sound signals (input signals) received from multiple microphones 15 or sound signals (output signals) output to multiple speakers 14. The plug-in effect sets an insertion point for a certain signal processing block among multiple signal processing blocks, and causes a signal processor of another device to perform effect processing at the insertion point.

[0016] The mixer 11 transmits an audio signal on the input side of a certain insertion point to the interface device 12. The interface device 12 transmits the audio signal received from the mixer 11 to the information processing terminal 16. The information processing terminal 16 applies a predetermined effect processing to the audio signal received from the interface device 12 and transmits it to the interface device 12. The interface device 12 transmits the audio signal after the effect processing to the mixer 11. The mixer 11 receives an audio signal from the interface device 12. The mixer 11 outputs the received audio signal to the output side of the insertion point. Note that in this embodiment, a speaker 14 and a microphone 15 are shown as examples of audio equipment connected to the interface device 12, but in reality, a wide variety of audio equipment is connected to the interface device 12.

[0017] 3 is a block diagram showing the configuration of the mixer 11. The mixer 11 includes a display 101, a user I / F 102, an audio I / O (Input / Output) 103, a signal processing unit (DSP) 104, a network I / F 105, a CPU 106, a flash memory 107, and a RAM 108.

[0018] The CPU 106 is a control unit that controls the operation of the mixer 11. The CPU 106 performs various operations by reading out a predetermined program stored in a flash memory 107, which is a storage medium, into a RAM 108 and executing the program.

[0019] The program read by CPU 106 does not need to be stored in flash memory 107 within the device itself. For example, the program may be stored in a storage medium of an external device such as a server. In this case, CPU 106 simply reads the program from the server into RAM 108 and executes it each time.

[0020] The signal processing unit 104 is configured with a DSP for performing various signal processing. The signal processing unit 104 performs signal processing such as effect processing and mixing processing on an audio signal input from an audio device such as a microphone 15 via the audio I / O 103 or the network I / F 105. The signal processing unit 104 outputs the processed audio signal to an audio device such as a speaker 14 via the audio I / O 103 or the network I / F 105.

[0021] 4 is a functional block diagram showing the flow of sound signal processing in the mixer 11. As shown in FIG. 4, signal processing is performed functionally by an input patch 151, an input channel 152, a bus 153, an output channel 154, and an output patch 155.

[0022] The input patch 151 assigns the received sound signal to at least one channel out of multiple channels (for example, 32 channels).

[0023] Each channel of the input channels 152 performs predetermined signal processing on the input sound signal. Each channel of the input channels 152 sends the processed audio signal to a subsequent bus 153. The bus 153 has a plurality of buses, such as a stereo bus (L, R buses) and a MIX bus.

[0024] The output channel 154 has a plurality of channels corresponding to each bus included in the bus 153. Each channel in the output channel 154 performs various signal processing on the input sound signal, similar to the input channel.

[0025] Each channel of the output channels 154 sends the processed audio signal to the output patch 155. The output patch 155 assigns each output channel to a sending device. As a result, the mixer 11 outputs the processed audio signal to the speaker 14.

[0026] The input channel 152 also includes an insert point (INSERT) 152A for inserting a plug-in effect, and the output channel 154 also includes an insert point (INSERT) 154A for inserting a plug-in effect.

[0027] The sound signal input to INSERT 152A or INSERT 154A is transmitted to the information processing terminal 16 via the interface device 12. The sound signal subjected to plug-in effect processing in the information processing terminal 16 returns to INSERT 152A or INSERT 154A of the mixer 11 via the interface device 12.

[0028] 5 is a block diagram showing the configuration of the interface device 12. The interface device 12 includes a user interface (I / F) 200, an audio I / O (Input / Output) 201, a USB I / F 202, a signal processing unit 203, a network interface (I / F) 204, a CPU 205, a flash memory 206, and a RAM 207.

[0029] The CPU 205 is a control unit that controls the operation of the interface device 12. The CPU 205 performs various operations by reading out a predetermined program stored in a flash memory 206, which is a storage medium, into a RAM 207 and executing the program.

[0030] The programs read by CPU 205 do not need to be stored in flash memory 206 within the device itself. For example, the programs may be stored in a storage medium of an external device such as a server. In this case, CPU 205 simply reads the programs from the server into RAM 207 and executes them each time.

[0031] The signal processing unit 203 is made up of a DSP and performs various signal processing on audio signals received from the audio I / O 201, the USB I / F 202, or the network I / F 204. For example, it converts packet data of audio signals conforming to network standards such as AVB (Audio Video Bridging) or AES (Audio Engineering Society) 76, received via the network I / F 204, into packet data of audio signals conforming to the USB standard. Note that signal processing may also be performed by the CPU 205.

[0032] 6 is a block diagram showing the configuration of the information processing terminal 16. The information processing terminal 16 is a general-purpose information processing device such as a personal computer, a smartphone, or a tablet computer.

[0033] The information processing terminal 16 includes a display 301 , a user I / F 302 , a CPU 303 , a flash memory 304 , a RAM 305 , a network I / F 306 , and a USB I / F 307 .

[0034] CPU 303 reads a program stored in flash memory 304, which is a storage medium, into RAM 305 to implement a predetermined function. Note that the program read by CPU 303 does not have to be stored in flash memory 304 within its own device. For example, the program may be stored in a storage medium of an external device such as a server. In this case, CPU 303 simply reads the program from the server into RAM 305 and executes it each time.

[0035] The information processing terminal 16 receives an audio signal from the interface device 12 via the USB I / F 307. The CPU 303 performs signal processing such as plug-in effect processing on the received audio signal. The CPU 303 transmits the audio signal after the effect processing to the interface device 12 via the USB I / F 307.

[0036] Fig. 7 is a functional block diagram showing the flow of sound signals in plug-in effect processing in the mixer 11, interface device 12, and information processing terminal 16. Fig. 8 is a flowchart showing the operation of each device.

[0037] First, the mixer 11 transmits the sound signal received from the microphone 15 as a first sound signal conforming to the network standard to the interface device 12 (S11). The interface device 12 receives the first sound signal via the network (S21).

[0038] 7, the interface device 12 functionally comprises a sound signal adjustment unit 251, a conversion unit 252, a determination / conversion unit 253, and a switching unit 254. These components are realized by the signal processing unit 203.

[0039] The conversion unit 252 generates a second sound signal of the USB standard from the first sound signal of the network standard (S22). The conversion unit 252 transmits the second sound signal of the USB standard to the information processing terminal 16 via the USB I / F 202 (S23).

[0040] The information processing terminal 16 receives the second sound signal (S31). The information processing terminal 16 functionally comprises an effect processor 351 and an index assigner 352. These components are implemented by the CPU 303. The effect processor 351 is an example of a signal processor, and performs signal processing such as plug-in effect processing on the second sound signal to generate a third sound signal, and the index assigner 352 assigns index data to the second sound signal (S32). The plug-in effect includes various types of effect processing such as a head amplifier, noise gate, equalizer, or compressor. The plug-in effect also includes mixing processing that superimposes multiple sound signals.

[0041] FIG. 9 is a diagram showing the structure of sound data for one sample. Index data is embedded in the lower bits of the sound data (third sound signal). For example, in the example of FIG. 9, the index data is 8-bit data, and is expressed by numerical values ​​from 0 to 255 arranged in time series. The index data is data that increments by 1 for each sample. The bit data returns to 0 after incrementing up to 255. However, the number of bits is not limited to this example.

[0042] The information processing terminal 16 transmits the third sound signal to which the index data has been added to the interface device 12 (S33). The interface device 12 receives the third sound signal (S24). The determination / conversion unit 253 checks the state of the information processing terminal 16 based on the index data added to the third sound signal (S25).

[0043] As described above, the index data is incremented by one for each sample. Therefore, the determination / conversion unit 253 has an index memory including a first memory area for storing index data assigned to the currently received third sound signal and a second memory area for storing index data assigned to the third sound signal one sample earlier. The determination / conversion unit 253 compares the index data assigned to the currently received third sound signal with the index data assigned to the third sound signal one sample earlier, and determines the continuity of the bit data. If the bit data is continuous, the determination / conversion unit 253 determines that the state of the information processing terminal 16 is normal. If the bit data is discontinuous, the determination / conversion unit 253 determines that the state of the information processing terminal 16 is abnormal (not normal).

[0044] If the determination / conversion unit 253 determines that the state of the information processing terminal 16 is normal (S26→Yes), it converts the third sound signal into a fourth sound signal that conforms to the network standard (S27). Then, the determination / conversion unit 253 sets the switching unit 254 to output the fourth sound signal. The switching unit 254 transmits the fourth sound signal to the mixer 11 (S28). The mixer 11 receives the fourth sound signal (S29). In this case, the mixer 11 supplies the fourth sound signal to the speaker 14.

[0045] On the other hand, if the determination / conversion unit 253 determines that the state of the information processing terminal 16 is not normal (S26→No), it sets the switching unit 254 to output a fifth sound signal. The switching unit 254 transmits the fifth sound signal to the mixer 11 (S29). The mixer 11 receives the fifth sound signal (S13). In this case, the mixer 11 supplies the fifth sound signal to the speaker 14.

[0046] The fifth sound signal is generated by the sound signal adjustment unit 251 based on the first sound signal transmitted from the mixer 11. Therefore, when the interface device 12 determines that the state of the information processing terminal 16 is not normal, it returns the first sound signal to the mixer 11, bypassing the first sound signal.

[0047] The sound signal adjustment unit 251 generates a fifth sound signal by performing delay processing and level change processing on the first sound signal. The sound signal adjustment unit 251 generates a fifth sound signal every time it receives the first sound signal, regardless of the state of the information processing terminal 16. The delay processing and level change processing performed by the sound signal adjustment unit 251 correspond to the delay and level change caused by the plug-in effect processing of the information processing terminal 16. This reduces changes over time and in volume even when the sound signal returned to the mixer 11 switches from the fourth sound signal to the fifth sound signal. However, the delay processing and level change processing by the sound signal adjustment unit 251 are not essential.

[0048] As described above, in the sound processing system 1 of this embodiment, index data is assigned in the information processing terminal 16, and the interface device 12 determines the continuity of the sound signal based on the index data, and determines whether the state of the information processing terminal 16 is normal. If the interface device 12 determines that the state of the information processing terminal 16 is not normal, it returns the sound signal received from the mixer 11 to the mixer 11, so that even if some kind of problem occurs in the plug-in effect processing, the sound signal will not be interrupted. Therefore, it is possible to prevent the provision of sound from being interrupted.

[0049] The description of the present embodiment is illustrative in all respects and is not limiting. The scope of the present invention is defined not by the above-described embodiment but by the claims. Furthermore, the scope of the present invention is intended to include all modifications that are equivalent to the claims and fall within the scope thereof. The present invention can be applied to various modifications, for example, as follows.

[0050] (1) The interface device 12 generates the fifth sound signal based on the first sound signal received from the mixer 11, but the interface device 12 may generate the fifth sound signal based on the second sound signal.

[0051] (2) Although the interface device 12 determines whether the state of the information processing terminal 16 is normal based on the index data, it may also determine whether the state of the information processing terminal 16 is normal based on the third sound signal. For example, if the interface device 12 does not receive the third sound signal, it determines that the state of the information processing terminal 16 is not normal.

[0052] (3) If the interface device 12 determines that the state of the information processing terminal 16 is not normal and then determines that the state of the information processing terminal 16 has returned to normal after a predetermined time has elapsed, the interface device 12 may transmit to the mixer 11 a fourth sound signal based on the third sound signal received from the information processing terminal 16. As a result, when the state of the information processing terminal 16 has returned to normal, the interface device 12 automatically switches the sound signal to be transmitted to the mixer 11 from the fifth sound signal to the fourth sound signal.

[0053] (4) The index data may be assigned by the interface device 12. That is, the interface device 12 may assign the index data to the second sound signal and transmit it to the information processing terminal 16. The interface device 12 may determine that the information processing terminal 16 is normal if the bit values ​​of the index data assigned to the second sound signal and the index data assigned to the third sound signal are the same. In this case, the interface device 12 may hold the current index data and compare the held index data with the index data assigned to the received third sound signal. In this case, the interface device 12 does not need to hold the index data of the previous sample.

[0054] (5) In the example of FIG. 9, the information processing terminal 16 assigns the index data to the lower bits of the sound data, but the index data may be transmitted to the interface device 12 as data separate from the sound signal data.

[0055] (6) The information processing terminal 16 and the interface device 12 are not limited to being connected via USB. For example, the information processing terminal 16 and the interface device 12 may be connected via wireless communication. For example, when connected according to the Wi-Fi (registered trademark) standard, the interface device 12 may further determine whether the state of the information processing terminal 16 is normal based on a timestamp added to packet data. Furthermore, the sound signal adjustment unit 251 may perform delay processing that further takes into account delay times caused by wireless communication.

[0056] However, the timestamp attached to the packet data corresponds to the communication status with the information processing terminal 16. Therefore, when making a determination based on the timestamp, it is determined whether the communication status with the information processing terminal 16 is normal. In contrast, the interface device 12 of this embodiment makes a determination based on the index data attached to the sound signal, and is therefore able to determine the status of the plug-in effect processing in the information processing terminal 16. Therefore, even if the communication status with the information processing terminal 16 is normal, if there is an abnormality in the sound signal, the interface device 12 returns the sound signal received from the mixer 11 to the mixer 11. This prevents the sound signal from being interrupted even if some kind of problem occurs in the plug-in effect processing, making it possible to prevent abnormalities from occurring in the sound supplied to the speaker 14.

[0057] (7) The delay time and the level change amount in the sound signal adjustment unit 251 may be fixed or variable. The user may specify the delay time or the level change amount via the user I / F 200 of the interface device 12. The interface device 12 may obtain the delay time or the level difference by comparing the second sound signal with the third sound signal. The interface device 12 may display the obtained delay time or level difference on a display (not shown). In this case, the user can specify the delay time or the level change amount by referring to the displayed delay time or level difference. The interface device 12 may also automatically adjust the delay time or the level change amount based on the obtained delay time or level difference. Note that the amount of delay caused by each plug-in effect process is predetermined. Therefore, the interface device 12 may acquire information about the delay caused by the plug-in effect process in the information processing terminal 16 and automatically adjust the delay time based on the acquired information.

[0058] (8) The user may manually switch the sound signal to be sent to the mixer 11 from the fourth sound signal to the fifth sound signal via the user I / F 200 of the interface device 12. The user may manually switch from the fourth sound signal to the fifth sound signal only for a specific channel, or may manually switch from the fourth sound signal to the fifth sound signal for all channels. In this case, the user I / F 200 includes a switch for each channel and a switch for all channels.

[0059] (9) In the above embodiment, the interface device 12 can determine whether the state of the information processing terminal 16 is normal within a time period corresponding to one sample by comparing the index data of the received third sound signal with the index data of the previous sample. That is, the interface device 12 can determine the state of the plug-in effect processing in the information processing terminal 16 in real time. However, the interface device 12 may also determine that the state of the information processing terminal 16 is abnormal if multiple consecutive samples show an abnormality in the index data. For example, the interface device 12 may determine that the state of the information processing terminal 16 is abnormal if 100 consecutive samples show an abnormality in the index data.

[0060] (10) The user may specify the number of samples required to determine that the state of the information processing terminal 16 is abnormal via the user I / F 200 of the interface device 12. Furthermore, the user may specify the number of samples required to automatically switch the sound signal to be sent to the mixer 11 from the fifth sound signal to the fourth sound signal in the above (3). The fewer the number of samples specified, the shorter the time it takes for the sound signal to switch when an abnormality occurs or when normality is restored. The more samples specified, the longer the time it takes for the sound signal to switch. The shorter the time it takes for the sound to be interrupted or for an abnormal sound to be supplied to the speaker 14, but frequent switching may cause the user to feel uncomfortable. By receiving a specification from the user for the length of time required for switching, the interface device 12 can set the switching timing as intended by the user, thereby reducing such discomfort.

[0061] (11) When switching from one plug-in effect to another, the information processing terminal 16 may issue an event notification to the interface device 12. When the interface device 12 receives the event notification, it transmits a fourth sound signal to the mixer 11 even if it subsequently determines that the state of the information processing terminal 16 is abnormal. This prevents the interface device 12 from mistaking the switching of the plug-in effect processing for an abnormality.

[0062] (12) The number of bits is not limited to 8 bits. For example, the number of bits may be 10 bits. In this case, the index data is expressed as a numerical value between 0 and 1023. The index data may also be time information. For example, the index data may be time information at the time when the information processing terminal 16 is started up. In this case, the interface device 12 determines the continuity of the bit data based on the time information at a predetermined interval (for example, every second).

[0063] (13) In the above embodiment, the interface device 12 is shown as an example of the acoustic device of the present invention. The acoustic device of the present invention may be a mixer, an information processing device, a processor for processing sound signals, an amplifier, or the like. [Explanation of symbols]

[0064] 1. Sound processing system 11...Mixer 12...Interface device 13…Network 14...Speaker 15...Mike 16...Information processing terminal 101...Indicator 102...User I / F 103...Audio I / O 104...signal processing unit 105...Network I / F 106...CPU 107...Flash memory 108...RAM 151...Input patch 152...input channel 152A, 154A…INSERT 153...Bus 154...Output channel 155...Output patch 200...User I / F 201...Audio I / O 202...USB I / F 203...signal processing unit 204...Network I / F 205...CPU 206...Flash memory 207...RAM 251...Sound signal adjustment unit 252...Conversion section 253…Judgment / Conversion Section 254...Switching section 301...Indicator 302...User I / F 303...CPU 304...Flash memory 305...RAM 306...Network I / F 307...USB I / F 351...Effect processing section 352...Index assignment section

Claims

1. an acoustic device receiving a first sound signal from a first sound processing device; the first sound processing device is a mixer having both input and output functions; the acoustic device generates a second sound signal based on the first sound signal; the acoustic device transmits the second sound signal to a second sound processing device; the second sound processing device generates a third sound signal by performing signal processing on the second sound signal; the acoustic device receives the third sound signal from the second sound processing device; the acoustic device confirms a state of the second sound processing device based on the signal received from the second sound processing device; transmitting a fourth sound signal based on the third sound signal to the first sound processing device when it is determined that the second sound processing device is in a normal state; if it is determined that the state of the second sound processing device is abnormal, generating a fifth sound signal based on the first sound signal or the second sound signal and transmitting the fifth sound signal to the first sound processing device. Sound processing methods.

2. If it is determined that the state of the second sound processing device is abnormal, a fifth sound signal is generated by adding a delay or level change corresponding to the signal processing added by the second sound processing device to the first sound signal or the second sound signal, and the fifth sound signal is transmitted to the first sound processing device. The sound processing method according to claim 1 .

3. the acoustic device determines a state of the second sound processing device based on index data assigned to the second sound signal or the third sound signal; The index data includes time-series information. The sound processing method according to claim 1 or 2.

4. the acoustic device comprises an index memory including a first memory area for storing index data to be assigned to the current second sound signal or the third sound signal, and a second memory area for storing index data to be assigned to the second sound signal or the third sound signal one sample before, determining a state of the second sound processing device by comparing the index data in the first memory area with the index data in the second memory area; The sound processing method according to claim 3 .

5. the acoustic device determines the state of the second sound processing device by determining whether or not the two index data are in a time series relationship as a result of the comparison. The sound processing method according to claim 4.

6. when the second sound processing device performs signal processing when the third sound signal is discontinuous in time series, the second sound processing device notifies the acoustic device of an event before performing the signal processing; when receiving the event notification, the acoustic device transmits a fourth sound signal based on the third sound signal to the first sound processing device even if it determines that the state of the second sound processing device is abnormal after receiving the event notification. The sound processing method according to any one of claims 1 to 5.

7. the acoustic device determines that the state of the second sound processing device is abnormal, and when determining that the state of the second sound processing device is normal after a predetermined time has elapsed, transmits a fourth sound signal based on the third sound signal to the first sound processing device. The sound processing method according to any one of claims 1 to 6.

8. Accepting a designation of the length of the predetermined time from a user; The sound processing method according to claim 7.

9. the first sound processing device receives an input of a sound signal from a second acoustic device different from the first acoustic device; transmitting the first sound signal based on the sound signal input from the second acoustic device; The sound processing method according to any one of claims 1 to 8.

10. the first sound processing device transmits a sound signal based on the fourth sound signal or the fifth sound signal received from the acoustic device to a third acoustic device different from the acoustic device; The sound processing method according to any one of claims 1 to 9.

11. an acoustic device receiving a first sound signal from a first sound processing device; the first sound processing device is a mixer having both input and output functions; the acoustic device generates a second sound signal based on the first sound signal; the acoustic device transmits the second sound signal to a second sound processing device; the second sound processing device generates a third sound signal by performing signal processing on the second sound signal; the acoustic device receives the third sound signal from the second sound processing device; the acoustic device confirms a state of the second sound processing device based on the signal received from the second sound processing device; transmitting a fourth sound signal based on the third sound signal to the first sound processing device when it is determined that the second sound processing device is in a normal state; if it is determined that the state of the second sound processing device is abnormal, generating a fifth sound signal based on the first sound signal or the second sound signal and transmitting the fifth sound signal to the first sound processing device. Sound processing system.

12. When it is determined that the state of the second sound processing device is abnormal, a fifth sound signal is generated by adding a delay or level change corresponding to the signal processing added by the second sound processing device to the first sound signal or the second sound signal, and the fifth sound signal is transmitted to the first sound processing device. The sound processing system of claim 11.

13. the acoustic device determines a state of the second sound processing device based on index data assigned to the second sound signal or the third sound signal; The index data includes time-series information.

13. The sound processing system according to claim 11 or 12.

14. the acoustic device comprises an index memory including a first memory area for storing index data to be assigned to the current second sound signal or the third sound signal, and a second memory area for storing index data to be assigned to the second sound signal or the third sound signal one sample before, determining a state of the second sound processing device by comparing the index data in the first memory area with the index data in the second memory area; 14. The sound processing system of claim 13.

15. the acoustic device determines the state of the second sound processing device by determining whether or not the two index data are in a time series relationship as a result of the comparison.

15. The sound processing system of claim 14.

16. when the second sound processing device performs signal processing when the third sound signal is discontinuous in time series, the second sound processing device notifies the acoustic device of an event before performing the signal processing; when receiving the event notification, the acoustic device transmits a fourth sound signal based on the third sound signal to the first sound processing device even if it determines that the state of the second sound processing device is abnormal after receiving the event notification.

16. A sound processing system according to any one of claims 11 to 15.

17. the acoustic device determines that the state of the second sound processing device is abnormal, and when determining that the state of the second sound processing device is normal after a predetermined time has elapsed, transmits a fourth sound signal based on the third sound signal to the first sound processing device.

17. A sound processing system according to any one of claims 11 to 16.

18. The audio device accepts a designation of the length of the predetermined time from a user.

18. The sound processing system of claim 17.

19. the first sound processing device receives a sixth sound signal from a second acoustic device different from the first acoustic device; transmitting the first sound signal based on the sixth sound signal input from the second acoustic device; 19. A sound processing system according to any one of claims 11 to 18.

20. the first sound processing device transmits a seventh sound signal to a third acoustic device different from the acoustic device, based on the fourth sound signal or the fifth sound signal received from the acoustic device; 20. A sound processing system according to any one of claims 11 to 19.

21. receiving a first sound signal from a first sound processing device that is a mixer having both input and output functions; generating a second sound signal based on the first sound signal; transmitting the second sound signal to a second sound processing device; receiving a third sound signal obtained by performing signal processing on the second sound signal by the second sound processing device; confirming a state of the second sound processing device based on a signal received from the second sound processing device; transmitting a fourth sound signal based on the third sound signal to the first sound processing device when it is determined that the second sound processing device is in a normal state; if it is determined that the state of the second sound processing device is abnormal, generating a fifth sound signal based on the first sound signal or the second sound signal and transmitting the fifth sound signal to the first sound processing device. Sound equipment.

22. When it is determined that the state of the second sound processing device is abnormal, a fifth sound signal is generated by adding a delay or level change corresponding to the signal processing added by the second sound processing device to the first sound signal or the second sound signal, and the fifth sound signal is transmitted to the first sound processing device.

22. The acoustic device according to claim 21.

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