Audio Control Console

Abstract

To provide a sound adjustment table, capable of performing an excellent sound adjustment with a high general purpose and less operation, by automatically calling various sound adjustment parameters.SOLUTION: In the sound adjustment table, an information input part 7 inputs information related to a device connected to the sound adjustment table, information related to a sound signal input / output into / from the device, and inputs information related to a parameter of a sound adjustment executed by each of sound signal adjustment parts 3a, 3b to 3n in response to the sound signal. An information set generation part 11 generates information sets in association with each information input into the information input part 7 each other. A preservation key word generation part 12 extracts a plurality of values related to each information in a predetermined reference and sets each value as a preservation key word. An information set searching part 15 extracts an information set by using the searching key word and the preservation key word. An adjustment control part 20 acquires information related to the parameter contained in the information set. The sound signal adjustment part executes the sound adjustment on the basis of the parameter to be acquired.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an audio mixing console that utilizes AI technology. [Background technology]

[0002] In radio and television broadcasting studios and music recording studios, audio mixing consoles are installed to adjust the volume and sound quality of input audio signals. A microphone is used as one of the input devices for audio signals. The audio mixing console adjusts the volume and sound quality of each audio signal input from multiple microphones or CDs that serve as background music sources, and then mixes and outputs each audio signal. The audio mixing console is operated by an operator called a mixing technician. The operator operates the audio mixing console to manually adjust the mixing balance of the audio signals to achieve the optimum balance.

[0003] In order to keep production costs down, broadcasting stations are required to produce programs efficiently with fewer staff. To make effective use of the studio, the tools to be used in the program are prepared before entering the studio. This has become increasingly important with the recent spread of remote work. In addition, even during the program production process that actually uses the studio, it is important to prevent a decline in program quality due to operational errors and an increase in production time due to re-recording.

[0004] Similarly, due to personnel cuts, some local broadcasting stations are unable to hire a dedicated sound engineer for some programs, which has led to a decline in program quality. Furthermore, the baby boomer generation, which has supported program production up until now, is retiring, and there is a problem of the loss of their expertise. This means that the assets of the broadcasting stations are disappearing, which is a management problem.

[0005] In order to solve the above problems in the audio control console, production tools such as offline program data creation tools, automatic faders, automatic mixing functions, etc. For example, as shown in Patent Documents 1 to 3, a technique has been proposed in which various parameters adjusted or set by an operator are stored and then called up and used when necessary. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2004-80735 A [Patent Document 2] JP 2013-197764 A [Patent Document 3] JP 2016-157996 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, the inventions described in the above-mentioned patent documents are directed to calling up parameters set during rehearsal during the actual performance, or to calling up parameters adjusted or set for a particular scene for a similar scene, and are not directed to calling up and using appropriate parameters in response to a wide variety of situations.

[0008] In particular, there are a wide variety of input / output devices, such as microphones and speakers, used in broadcasting stations, each with different input / output characteristics. In addition, there are a huge number of different volumes and sound qualities of the voices of individual performers that are input to and output from these devices, as well as a huge number of types of background music that are used. Moreover, when these combinations change, the parameters that need to be adjusted or set accordingly also change. Therefore, even if parameters are stored for a specific scene or device as in the conventional technology, it is not very versatile, and it is difficult for an operator to call up appropriate data depending on the situation in which he or she wants to use it.

[0009] The present invention has been proposed to solve the problems of the conventional technology as described above. The purpose of the present invention is to provide an audio adjustment console that uses AI technology to automatically call up various audio adjustment parameters according to a wide variety of situations, such as each connected device, input / output audio signals, and each scene in which the device is used, thereby enabling highly versatile and easy-to-use audio adjustment. [Means for solving the problem]

[0010] In order to achieve the above object, the audio mixing console of the present invention has the following configuration. (1) An audio signal input unit to which multiple audio signals are input, multiple audio signal adjustment units that adjust the input multiple audio signals based on predetermined parameters, an audio signal mixing unit that mixes the audio signals output from the multiple audio signal adjustment units, and an audio signal output unit that outputs the audio signals mixed by the audio signal mixing unit. (2) An information input unit for inputting information regarding equipment connected to the audio adjustment console, information regarding audio signals input / output to the equipment, and information regarding the parameters of audio adjustment performed on the audio signals by the audio signal adjustment unit. (3) An information set generation unit that links each piece of information input to the information input unit to each other to generate a single information set so as to include information regarding parameters of audio adjustments performed on the audio signal. (4) A storage keyword generation unit that extracts multiple values ​​related to each piece of information contained in each information set generated by the information set generation unit based on predetermined criteria, and sets each extracted value as a storage keyword for that information set. (5) A memory unit that links and stores each of the information sets and their keywords. (6) A search keyword generation unit that extracts multiple values ​​related to each piece of information from at least one or a combination of information related to the equipment connected to the audio adjustment console and information related to the audio signals input and output to the equipment, which are input to the information input unit when the audio signal adjustment unit performs audio adjustment, based on predetermined criteria, and sets each extracted value as a keyword for searching for that information. (7) An information set search unit that searches for information sets stored in the memory unit using the search keywords and the storage keywords, and extracts information sets in which the search keywords and the storage keywords match a predetermined criterion. (8) An adjustment control unit that acquires information regarding parameters for audio adjustment included in the information set extracted by the information set search unit, and causes the audio signal adjustment unit to perform audio adjustment based on the acquired parameters.

[0011] The audio mixing console of the present invention also includes the following configuration. (1) the information set search unit extracts a plurality of information sets in which the search keywords and the storage keywords match a predetermined criterion; The adjustment control unit calculates and processes a plurality of audio adjustment parameters contained in the plurality of extracted information sets, and causes the audio signal adjustment unit to perform audio adjustment based on the parameters obtained as a result of the calculation.

[0012] (2) the information input unit has a progress table input unit for receiving a progress table of a program for which the audio signal adjustment unit performs audio adjustment; a program progress status extraction unit for extracting information on a device connected to an audio control console, information on an audio signal input / output to the device, and a time-dependent change in program progress from the information described in the progress table, the information set search unit extracts different information sets in response to a change over time in the program progress input from the progress table input unit; The adjustment control section performs different audio adjustments in accordance with changes over time in the progress of a program, based on audio adjustment parameters contained in the different information sets extracted by the information set search section.

[0013] (3) An output level detection unit that, at the instruction of the adjustment control unit, performs adjustment processing on the input audio signal based on the acquired parameters, and detects whether the signal level after the adjustment processing is lower than a certain level. (4) The output level detection unit has a function of notifying the audio input unit of an abnormality in the input of the audio signal when the signal level after the adjustment process is lower than a preset threshold value.

[0014] (5) When the signal level after the adjustment process is lower than a preset threshold value, the output level detection unit searching for a plurality of information sets linking information on the audio signal input to the device having a search keyword common to the audio signal on which an adjustment process has been performed based on the acquired parameters and information on an output level of the audio signal on which an adjustment process has been performed, from information on the audio signals input to the device and output from the audio signal; The adjustment control unit performs a calculation process on information regarding the output level of the audio signal contained in the extracted multiple information sets, corrects the parameters on which the adjustment process was performed so that the output level becomes the output level obtained as a result of the calculation, and causes the audio signal adjustment unit to perform audio adjustment based on the corrected parameters.

[0015] (6) a gain reduction value detection unit for detecting a gain reduction value of a compressor for the audio signal after the adjustment process; When the gain reduction value of the compressor after the adjustment process is out of a preset threshold, the gain reduction value detection unit: searching for a plurality of information sets linking information on the audio signal input to the device having a search keyword common to the audio signal on which an adjustment process has been performed based on the acquired parameters and information on a gain reduction value for the audio signal on which an adjustment process has been performed, from information on the audio signals input to and output from the plurality of devices; The adjustment control unit performs a calculation process on information regarding the gain reduction value of the audio signal on which the adjustment process has been performed, which is contained in the extracted multiple information sets, and causes the audio signal adjustment unit to perform audio adjustment based on parameters that correct the gain reduction value that deviates from the threshold value so as to obtain the gain reduction value obtained as the calculation result.

[0016] (7) A balance comparison unit is provided that compares a direct sound and an indirect sound of the audio signal after the adjustment process, When the balance between the direct sound and the indirect sound after the adjustment process deviates from a preset threshold, the balance comparison unit searching for a plurality of information sets linking information on an audio signal input to the device having a search keyword common to an audio signal that has been subjected to an adjustment process based on the acquired parameters, and information on the balance between direct sound and indirect sound for the audio signal that has been subjected to the adjustment process, from information on the audio signals input to and output from the plurality of devices; The adjustment control unit calculates and processes information regarding the balance between direct sound and indirect sound of the audio signal for which the adjustment process has been performed, which is included in the extracted information sets, corrects the parameters for which the adjustment process has been performed so as to achieve the balance obtained as a result of the calculation, and causes the audio signal adjustment unit to perform audio adjustment based on the corrected parameters.

[0017] (8) The audio signal mixing unit includes a mixing balance comparison unit that compares mixing balances of the plurality of audio signals after the adjustment processing, The mixing balance comparison unit is searching for a plurality of information sets linked together information on the audio signal input to the device having a search keyword common to the audio signal on which adjustment processing has been performed based on the acquired parameters, and information on the mixing balance when the audio signal mixing unit mixes the plurality of audio signals on which adjustment processing has been performed, from among information on the audio signals input to and output from the plurality of devices; The adjustment control unit performs calculations on information regarding the mixing balance by the audio mixing unit contained in the extracted multiple information sets, corrects the parameters on which the adjustment process was performed so as to achieve the mixing balance obtained as a result of the calculation, and causes the audio signal adjustment unit to perform audio adjustment based on the corrected parameters.

[0018] (9) An EQ·FIL detection unit is provided for detecting an equalizing effect and / or a filtering effect on an audio signal after adjustment processing, the EQ·FIL detection unit detects whether the equalizing effect and / or filtering effect after the adjustment process deviates from a preset threshold, and if it deviates from the threshold, searches for a plurality of information sets in which information on an audio signal input to a device having a search keyword common to the audio signal on which the adjustment process has been performed is linked with information on the equalizing effect and / or filtering effect for the audio signal on which the adjustment process has been performed, from information on audio signals input to and output from a plurality of devices; The adjustment control unit performs calculations on information regarding the equalizing effect and / or filtering effect contained in the extracted information sets, corrects the parameters on which the adjustment process was performed so that the equalizing effect or filtering effect obtained as a result of the calculation is obtained, and causes the audio signal adjustment unit to perform audio adjustment based on the corrected parameters. Effect of the Invention

[0019] According to the present invention, it is possible to provide an audio adjustment console that is highly versatile and enables excellent audio adjustment with fewer operations. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing an example of a program progress table to be input to an information input unit in the embodiment of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] [1. Configuration of the embodiment] [1-1.Basic configuration] An embodiment of the present invention will be specifically described below with reference to Fig. 1. As shown in Fig. 1, the audio mixing console of this embodiment has a plurality of audio signal input units 2a, 2b, ..., 2n, a plurality of audio signal adjustment units 3a, 3b, ..., 3n that adjust audio signals input from each of the audio signal input units 2a, 2b, ..., 2n to predetermined frequency characteristics and levels, direct sound ratios, and mixing balances of each audio signal, an audio signal mixing unit 4 that mixes the audio signals that have been adjusted by each of the audio signal adjustment units 3a, 3b, ..., 3n, and an audio signal output unit 5 that outputs the audio signal mixed by the audio signal mixing unit 4.

[0022] The audio signal input units 2a, 2b, ..., 2n are connected to a plurality of input devices 1a, 1b, ..., 1n serving as sound sources such as playback devices for microphones and CDs, and audio signals output by these input devices 1a, 1b, ..., 1n are input. For example, in a broadcasting studio, the voices of a male announcer, a female announcer, and a plurality of commentators, and in a recording studio for a band performance, the voices of vocals and other instruments, are input to the audio signal input units 2a, 2b, ..., 2n as audio signals A, B, ..., and N of each channel, respectively. Note that when playback devices are used as the input devices 1a, 1b, ..., 1n, the playback devices only output audio signals A, B, ..., and N.

[0023] The audio signal adjustment units 3a, 3b, ..., 3n detect the audio signals input from the audio signal input units 2a, 2b, ..., 2n and adjust them to a predetermined frequency characteristic. The audio signal adjustment units 3a, 3b, ..., 3n are, for example, parametric equalizers (PEQ), and adjust setting parameters such as center frequency, equivalent amount, and Q value (Quality Factor) so that the frequency characteristics of the input audio signals become uniform or become musically suitable frequencies. In addition, the output level (gain), the ratio of direct sound to indirect sound, dynamics, and the mixing balance of each audio signal are also adjusted based on the setting parameters, and the characteristics of the mixed output sound are adjusted. The audio signal mixer 4 mixes the audio signals that have been adjusted by the audio signal adjusters 3a, 3b, ..., 3n. The audio signal output unit 5 outputs the audio signals mixed by the audio signal mixer 4 to an output device such as a speaker or a recording device, or a television or radio transmitter in the case of live broadcasting.

[0024] In this embodiment, the main components include an information input unit 7, an information set generation unit 11, a keyword for storage generation unit 12, a memory unit 13, a keyword for search generation unit 14, an information set search unit 15, and an adjustment control unit 20. In addition, the device has an output level detection unit 16, a gain reduction value detection unit 17, a direct sound / indirect sound balance comparison unit 18, and a mixing balance comparison unit 19 in order to analyze the signal after the audio adjustment process by the audio signal adjustment units 3a, 3b, ..., 3n and automatically correct parameters for audio adjustment according to the analysis results.

[0025] [1-2. Main components] [1-2-1. Information input section 7] The information input unit 7 inputs three types of information, that is, information on the device connected to the audio adjustment console, information on the audio signal input / output to the device, and information on the parameters of the audio adjustment performed on the audio signal by the audio signal adjustment units 3a, 3b, ..., 3n. Therefore, the information input unit 7 has a device / audio signal / parameter information input unit 8.

[0026] As a method for inputting information into the device / audio signal / parameter information input unit 8, any known method can be used, such as reading in various information in a data format such as a list or CSV, or sorting and reading in a predetermined format manually or using a sorting program. In addition to the three types of information, information on changes in the program over time can also be read in the form of a program progress chart, which will be described later, or other information such as alarms generated during audio adjustment and operator comments can also be read.

[0027] The information about the devices connected to the audio mixing console includes the characteristics of input devices 1a, 1b, ... 1n, such as microphones, speakers, VTRs, CDs, and outside telephones, and output devices 6, as well as the data format, number of bits, sampling frequency, and type of instrument.

[0028] The information about the audio signals input to and output from the equipment includes information about the user of the equipment connected to the audio mixing console and information about the recording of the audio signals. For example, the information includes the following: (1) Information regarding the production of the program -Types and values ​​of audio adjustment parameters - Optimal values ​​of parameters adjusted by the operator Cue Sheet Program comments ·Production date and time Microphone used Cast and recording location

[0029] (2) Information regarding the recording of audio signals Environmental conditions such as the date of recording (season, weather, temperature, humidity, location, indoor / outdoor, latitude, altitude, etc.) Recording conditions (studio, live music venue, hall, number of people) ·Settings (number of people, microphone position, etc.)

[0030] (3) Information about users ·Users (professional or amateur, male or female, age, announcer's physical condition) Recording engineer

[0031] (4) Information required by broadcasting stations regarding multiple announcer comments, music, VTR, background music, etc., such as song titles, composers, performers, producers, resolution, and other information about audio sources other than audio

[0032] The information on the audio adjustment parameters includes the types and values ​​of various parameters, information on the operator who set the parameters, and information on an alarm that was generated and output by the operator or automatically when the parameters were set. Specifically, the information includes information on what processing the audio adjustment console of this embodiment will perform for the following types of parameters and their values:

[0033] (1) Microphone gain settings - Set the optimum gain for each type of microphone. Set the initial value for conditions such as microphone + announcer. The input level of the signal processing section is monitored, and the optimum gain is determined and fine-tuned based on the average value and headroom.

[0034] (2) Filter settings - Set the optimal cutoff frequency depending on the type of microphone. - Set the optimum frequency based on environmental conditions.

[0035] (3) Equalizer settings -Compare the FFT of the input signal with the FFT of the reference signal to determine the EQ settings so that the frequency characteristics are consistent. In addition to the adjustment results of this embodiment, the settings of a specified engineer can also be used as reference.

[0036] (4) Compressor settings -Compare the current compressor gain reduction value with the reference gain reduction value and determine the compressor setting value so that the characteristics are consistent. In addition to the adjustment results of this embodiment, the settings of a specified engineer can also be used as reference.

[0037] (5) Fader Settings When speaking alone, adjust the fader according to the announcer's voice volume. - BG level can be controlled according to the cue sheet. -When you start talking, the sound source such as a CD will automatically switch to the background level.

[0038] (6) Effector settings (reverb) The balance of direct and indirect sounds of the current sound source is compared with the balance of direct and indirect sounds of the reference, and the setting value is determined so that the characteristics are aligned.

[0039] [1-2-2. Input of progress chart into information input section 7] The information input unit 7 includes a progress chart input unit 9 that receives a progress chart of a program for which the audio signal adjustment units 3a, 3b, ... 3n are to perform audio adjustment. That is, FIG. 2 is an example of a program progress chart, which chronologically lists the microphones used as the program progresses, their users (caster, commentator, guest), microphone levels, VTR audio, VTR level, BGM audio, BGM level, and other information (comments, etc.). The progress chart input unit 9 reads, for example, a progress chart in this format. Note that the format of the progress chart is not limited to that in FIG. 2, and other formats, such as an EDL list, can also be used.

[0040] The input of the progress table is mainly performed when new audio adjustment is performed, in order to input information about the device connected to the target audio adjustment console and information about the audio signal input / output to the device. The reason is that the audio adjustment parameters and their values ​​are not usually entered in the progress table. However, if the program progress and the information about the audio adjustment parameters at that time (microphone level, VTR level, BGM level in Figure 2) are linked and left as is the progress table in Figure 2, it can also be used to read each piece of information when creating an information set that will become the teacher data.

[0041] The information input unit 7 includes a program progress extraction unit 10 that extracts information on the device connected to the audio control table, information on the audio signals inputted and outputted to the device, and changes in the program progress over time from the information written in the progress table inputted to the progress table input unit 9. That is, since a progress table such as that shown in FIG. 2 is generally prepared in the form of a list, the various information contained therein is not organized into the three types of information as in this embodiment. Therefore, the program progress extraction unit 10 uses a dictionary file or a sorting program separately prepared to extract information on the device connected to the audio control table and information on the audio signals inputted and outputted to the device from the information written in the progress table. At the same time, information that allows confirmation of changes over time accompanying the program progress, such as the scene number in Table 2 and the start time of each scene based on the start time of the program, is also extracted from the progress table.

[0042] [1-2-3. Information set generation unit 11] The information set generation unit 11 generates one information set by linking each piece of information input to the information input unit 7 to each other so as to include information on the parameters of the sound adjustment performed on the sound signal. In this embodiment, when new sound adjustment is performed, the created information set is used as training data to automatically obtain the required new sound adjustment parameters and their values. Therefore, it is necessary to compare information on each device and sound signal when performing new sound adjustment with various information included in the training data and call up the optimal training data.

[0043] The various types of information input to the information input unit 7 do not necessarily include the three types of information evenly depending on the input data format and input method, and some information is missing information on voice adjustment parameters necessary for the teacher data. In this embodiment, the information set generation unit 11 links the three types of information so as to include information on voice adjustment parameters essential for new voice adjustment, and generates one information set that can be extracted by search.

[0044] The information set generating unit 11 can use what is called growing teacher data to generate an information set. In other words, the three types of information constituting the information set include various information, and therefore, at the time when the information is input to the information input unit 7, it is unclear whether or not the information is necessary for the audio adjustment process. In this embodiment, when generating the information set generating unit 11, the input information is stored as it is in each information set without being cut.

[0045] That is, in conventional search engines, if the words and values ​​contained in the generated information set are directly used as search keywords, the amount of information to be processed becomes enormous, so in conventional AI-type search devices, the operator or the creator of the search engine appropriately extracts each piece of information contained in the information set when the information set is generated. Therefore, the information set is generated and stored in the memory unit in a state where seemingly worthless information contained in the information set at the time of input is deleted. However, as information accumulates, a large amount of information that was thought to be worthless at a certain point in time is generated, and it is expected that this information will become important when performing voice adjustment.

[0046] In anticipation of such a situation, in this embodiment, the information input to the information set is stored as much as possible without deleting each piece of information. Instead, a keyword for improving search speed is generated for each information set by the keyword for storage generation unit 12 described later. As a result, even if a large number of information sets are accumulated and information that was initially thought to be worthless is accumulated and then changes to something meaningful for searching, the keyword for storage generation unit 12 reconstructs the keywords for storage, thereby updating the information set, i.e., growing the teacher data.

[0047] Of course, the information input to the information input unit 7 may include data other than the three types of information mentioned above that does not need to be reflected in the teacher data, and such data may be deleted by using an appropriate filter or dictionary file, or an alarm may be sent to an operator, etc.

[0048] [1-2-4. Saved Keyword Generation Unit 12] The storage keyword generating unit 12 extracts a plurality of values ​​related to each piece of information input to the information input unit 7 and / or each piece of information included in each piece of information set generated by the information set generating unit 11 according to a predetermined criterion, and sets each extracted value as a storage keyword for the information set. That is, since the words and values ​​included in the three types of input information are huge in number, it is not preferable in terms of search efficiency to use these words and values ​​as keywords. In this embodiment, the three types of input information are superordinated by a dictionary file or a sorting program, and numerical values ​​are divided into a certain range or averaged, thereby generating a simplified storage keyword. For example, the storage keyword is generated by superordinately conceptualizing the type of BGM into pop and classical music by referring to the songs included in each piece of information, classifying individual announcers and MCs into female and male, and further performing calculation processing such as rounding off parameter values.

[0049] The generation of the storage keywords is not performed only when the information set is generated, but is performed successively according to a certain standard, for example, periodically by a program incorporated in the storage keyword generating unit 12, or according to an instruction from an operator, since the information set functions as growing teacher data as described above. In this way, the keywords that the storage keyword generating unit 12 assigns to each information set change, so that the information set extracted during the search can follow the changes in each piece of information input. For example, even if the amount of information is almost zero when it is first input, such as a new announcer, a new microphone, or a sound source, and it is information that cannot become a keyword in a normal search engine, in this embodiment, the input raw information is stored in the information set, and the storage keywords are periodically reviewed, so that it is possible to extract it as a search target when the amount of information has accumulated.

[0050] [1-2-5. Search keyword generation unit 14] The search keyword generating unit 14 extracts multiple values ​​related to each piece of information from at least one or a combination of information related to the device connected to the audio adjustment console and information related to the audio signal input / output to the device, which are input to the information input unit 7 when the audio signal adjustment units 3a, 3b, ..., 3n perform audio adjustment, using a predetermined criterion, and sets each extracted value as a keyword for searching the information. That is, for the same reason as for the storage keywords, in this embodiment, the search keywords are also simplified by conceptualizing the three types of input information as a higher level using a dictionary file or a sorting program, or dividing or averaging numerical values ​​into certain ranges, to generate storage keywords.

[0051] [1-2-6. Information set search section 15] The information set search unit 15 searches for information sets stored in the memory unit 13 using the search keyword and the storage keyword, and extracts information sets in which the search keyword and the storage keyword match a predetermined criterion. That is, the number of information sets stored in the memory unit 13 increases enormously as the teacher data is accumulated, so that when the information sets stored in the memory unit 13 are searched, a large number of information sets may be extracted.

[0052] In this embodiment, the information set to be extracted is optimized by setting a predetermined criterion. For example, from among the extracted information sets, an optimal information set is extracted based on criteria such as the latest information set, voice adjustments performed by an operator with a high level of experience, the number of matching keywords between search and storage, and weighting of keywords.

[0053] It is also possible for the information set search unit 15 to extract multiple information sets. In this case, the data of the extracted multiple information sets is output to the adjustment control unit 20, and the adjustment control unit 20 performs averaging and other calculation processing to determine optimal voice adjustment parameters and their values.

[0054] When new audio adjustment is performed by inputting a progress table, the information set search unit 15 extracts multiple information sets whose search keywords and storage keywords match a predetermined criterion in accordance with changes in the program over time. In other words, as the program progresses over time, the program title, performers, and equipment used change from moment to moment, and different audio adjustment parameters and their values ​​are required. In this embodiment, different information sets corresponding to these changes are extracted.

[0055] [1-2-7. Adjustment control unit 20] The adjustment control unit 20 acquires information on the parameters of the sound adjustment included in the information set extracted by the information set search unit 15, and causes the sound signal adjustment units 3a, 3b, ..., 3n to perform sound adjustment based on the acquired parameters. When multiple information sets are extracted, the adjustment control unit 20 performs calculation processing on multiple sound adjustment parameters included in the multiple extracted information sets, and causes the sound signal adjustment units 3a, 3b, ..., 3n to perform sound adjustment based on the parameters obtained as a result of the calculation. As a method of calculation processing, averaging, median selection, weighting, etc. can be used, but other methods are also possible.

[0056] When the adjustment control unit 20 searches for information sets that change over time according to the input progress table, it performs different audio adjustments according to changes over time in the program progress based on the audio adjustment parameters included in the extracted different information sets. This makes it possible to perform appropriate audio adjustments for each scene of the program.

[0057] [1-2-8. Storage section 13] The storage unit 13 stores each information set and its keyword in association with each other. In addition, it stores information input to other parts of this embodiment and various data generated by other parts. When new audio adjustment is performed, new parameters and their values ​​generated by the audio adjustment console of this embodiment can be stored as teacher data in association with various information. In addition, it is also possible to output the stored contents in the form of a list or a progress chart so that the operator or performer can verify the determined new parameters and their values, as well as alarms. Furthermore, parameters set by the operator himself are also stored in the storage unit 13.

[0058] [1-3. Configuration for automation] [1-3-1. Output level detection] The output level detection unit 16 performs adjustment processing on the audio signal input to the audio signal adjustment units 3a, 3b, ... 3n based on the acquired parameters in accordance with an instruction from the adjustment control unit 20, and detects whether the signal level after the adjustment processing is lower than a certain level. The output level detection unit 16 has a function of notifying an abnormality in the input of the audio signal to the audio signal input units 2a, 2b, ... 2n when the signal level after the adjustment processing is lower than a preset threshold. For example, an alarm is output when the signal level after the adjustment processing is lower than a certain level due to an inappropriate microphone setting (when the microphone is off or the distance or angle is inappropriate), voice quality, obstacles, etc.

[0059] The output level detection unit 16 has a function of automatically adjusting the signal level to an appropriate level when the signal level after the adjustment process is lower than a preset threshold or higher than a preset threshold. One of the methods is to obtain new parameters that are more appropriate by averaging the parameters of multiple information sets or by calculating the parameters by a method such as taking the median value, instead of the parameters of the information set that is the basis of the signal level that deviates from the threshold. In this case, the output level detection unit 16 searches for multiple information sets in which information on audio signals input to and output from multiple devices is linked to information on the output level of the audio signal on which the adjustment process has been performed and information on the audio signal input to a device having a search keyword common to the audio signal on which the adjustment process has been performed, and outputs the search results to the adjustment control unit 20.

[0060] The adjustment control unit 20 averages information relating to the output level of the audio signal contained in the extracted multiple information sets and performs other calculations, corrects the parameters on which the adjustment process was performed so that the output level becomes the output level obtained as a result of the calculation, and has the audio signal adjustment units 3a, 3b, ... 3n perform audio adjustment based on the corrected parameters.

[0061] As another method for automatically correcting the output level, instead of or in addition to the method of arithmetic processing of parameters of a plurality of information sets, for example, the following method can be adopted: That is, when the level of the audio signal input from each audio signal adjustment unit 3a, 3b, ..., 3n is equal to or lower than a preset threshold, the level value is set as the audio signal level value, and when the level value of the audio signal exceeds the threshold, the threshold value of the audio signal is set as the audio signal level value, a gain share coefficient is calculated based on the sum of the level values ​​of each audio signal, and the audio adjustment parameters are corrected based on the gain coefficient.

[0062] [1-3-2. Gain reduction value detector 17] The audio signal processing device includes a gain reduction value detection unit 17 that detects a gain reduction value of a compressor for an audio signal after adjustment processing. When the gain reduction value after adjustment processing is outside a preset threshold, the gain reduction value detection unit 17 searches for a plurality of information sets in which information on an audio signal input to a device having a search keyword common to the audio signal after adjustment processing and information on a gain reduction value for the audio signal after adjustment processing are linked together, from information on audio signals input to and output from a plurality of devices.

[0063] In this case, the adjustment control unit 20 performs calculations on information regarding the gain reduction values ​​of the audio signals that have been subjected to the adjustment process, which are included in the extracted multiple information sets, and causes the audio signal adjustment units 3a, 3b, ... 3n to perform audio adjustments based on parameters that correct the gain reduction values ​​that deviate from the threshold values ​​so as to obtain the gain reduction values ​​obtained as the calculation results.

[0064] [1-3-3. Direct and indirect sound balance comparison section 18] The balance comparison unit 18 compares the direct sound and the indirect sound of the audio signal after the adjustment process, and detects whether the balance between the direct sound and the indirect sound after the adjustment process is outside a preset threshold. If it is outside the threshold, the balance comparison unit 18 searches for a plurality of information sets in which information about an audio signal input to a device having a search keyword common to the audio signal after the adjustment process is linked to information about the balance between the direct sound and the indirect sound for the audio signal after the adjustment process, from information about audio signals input to and output from a plurality of devices.

[0065] In this case, the adjustment control unit 20 performs calculation processing on information on the balance between the direct sound and the indirect sound of the adjusted audio signal, which is included in the extracted multiple information sets, corrects the parameters on which the adjustment processing is performed so as to achieve the balance obtained as a result of the calculation, and causes the audio signal adjustment units 3a, 3b, ..., 3n to perform audio adjustment based on the corrected parameters. For example, the direct sound is convoluted with any impulse data included in the extracted information set, and the delay and reverb time of the indirect sound are adjusted to achieve this characteristic.

[0066] [1-3-4. Mixing balance comparison section 19 for multiple audio signals] The audio signal mixing unit 4 includes a mixing balance comparison unit 19 that compares the mixing balances of the multiple audio signals after the adjustment process. The mixing balance comparison unit 19 searches for multiple information sets in which information on audio signals input to and output from multiple devices is linked to information on audio signals input to a device having a search keyword common to the audio signal on which the adjustment process has been performed, and information on the mixing balance when the audio signal mixing unit 4 mixes the multiple audio signals on which the adjustment process has been performed. In this case, the adjustment control unit 20 performs calculations on the information regarding the mixing balance contained in the extracted multiple information sets, corrects the parameters on which the adjustment process was performed so as to achieve the mixing balance obtained as a result of the calculation, and has the audio signal adjustment units 3a, 3b, ... 3n perform audio adjustment based on the corrected parameters.

[0067] As in the automatic adjustment of the output level, when correcting the parameters in the mixing balance comparison unit 19, instead of or in addition to the method of arithmetic processing of parameters of a plurality of information sets, the following method can also be adopted: That is, when the mixing balance of the audio signals input from each audio signal adjustment unit 3a, 3b, ..., 3n is equal to or less than a preset threshold, the mixing ratio is set to the threshold of the audio signal as the mixing ratio of the audio signal when the mixing balance of the audio signal exceeds the threshold, the mixing balance is calculated based on the sum of the mixing ratios of the audio signals, and the audio adjustment parameters are corrected based on the mixing balance.

[0068] [1-3-5. EQ / FIL detection section 21] The EQ·FIL detection unit 21 detects the equalizing effect and filtering effect on the audio signal after the adjustment process, and detects whether the effect after the adjustment process is outside a preset threshold. If it is outside the threshold, the EQ·FIL detection unit 21 searches for a plurality of information sets in which information on an audio signal input to a device having a search keyword common to the audio signal after the adjustment process is linked to information on the equalizing effect and filtering effect on the audio signal after the adjustment process, from information on audio signals input to and output from a plurality of devices. In this case, the adjustment control unit 20 performs calculations on the information regarding the equalizing effect and filtering effect contained in the extracted multiple information sets, corrects the parameters on which the adjustment process was performed so as to obtain the equalizing effect and filtering effect obtained as the result of the calculation, and has the audio signal adjustment units 3a, 3b, ... 3n perform audio adjustment based on the corrected parameters.

[0069] [2. Effects] According to the embodiment having the above-mentioned configuration, the following effects are achieved.

[0070] [2-1. Basic effects] (1) The information input unit 7 inputs information about the devices connected to the audio adjustment console, information about the audio signals input / output to the devices, and information about the parameters of the audio adjustment performed on the audio signals by the audio signal adjustment units 3a, 3b, 3n. That is, for audio adjustment, information about the devices connected to the audio adjustment console is required, such as the number and arrangement of sound sources such as microphones, output speakers and recording devices, the characteristics of the devices themselves, and the purpose of the output audio. In addition, the parameters of the audio adjustment differ depending on the type of performance or performer performed by the audio signal to be adjusted, the location or environment where it is input or output, whether it is a human voice or another sound source such as an instrument or CD, and further whether it is the main audio or background music.

[0071] In this embodiment, the combination of information on the devices connected to these audio adjustment consoles, information on the audio signals input and output to the devices, and further the parameters when an operator or an automatic audio adjustment device performs audio adjustment for such combinations are linked to each other and saved as one information set. Therefore, a large amount of information on past audio adjustments is accumulated in the storage unit 13, and when performing new audio adjustment, audio adjustment similar to the audio adjustment performed in the past can be automatically performed simply by providing the audio adjustment console with the type and state of the audio signal to be adjusted and information on the devices that input and output the audio signal.

[0072] As a result, by implementing AI in the library function of the audio adjustment console, it becomes possible to call up appropriate settings. In addition, by accumulating the know-how of many operators (for example, voices that are easy for viewers to listen to), it is possible to further stabilize program quality. Furthermore, by analyzing and statistically converting the many accumulated information sets, it is possible to visualize audio adjustment technology, which is effective for human resource development and archiving. This makes it possible to ensure stable viewer service with program quality, while also reforming the way production staff work, and improving program production efficiency.

[0073] (2) In this embodiment, the storage keyword generating unit 12 is provided, which extracts multiple values ​​related to each piece of information included in each information set generated by the information set generating unit 11 according to a predetermined criterion, and sets each extracted value as a storage keyword for the information set. Therefore, it is possible to automatically extract information related to a large number of programs that are broadcast daily at broadcasting stations and other places, and information such as parameters of sound adjustments performed in relation to the information, to create storage keywords. As a result, it is possible to easily create a large amount of training data required to build a search system using AI.

[0074] (3) The audio signal adjustment units 3a, 3b, ... 3n have a search keyword generation unit 14 that extracts multiple values ​​contained in each piece of information input to the information input unit 7 when the audio signal adjustment units 3a, 3b, ... 3n perform audio adjustment, based on predetermined criteria, and sets each extracted value as a keyword for searching the information. Therefore, search keywords can be automatically generated from names and numbers written in commonly used materials such as a list of equipment to be used, a list of performers, a program progress chart, etc. As a result, it is possible to automatically extract search keywords from the large amount of program-related information that is carried out daily by broadcasting stations, etc., and when new audio adjustment is carried out, it is no longer necessary to manually select search keywords and input them into the audio adjustment console, reducing the effort required for new audio adjustment.

[0075] (4) When performing audio adjustment, even for the same performers and performances, the parameters for audio adjustment will differ depending on the characteristics of the equipment used. In this embodiment, however, information about the equipment connected to the audio adjustment desk, such as the characteristics of input devices 1a, 1b, ... 1n and output devices 6 such as microphones and speakers, data format, number of bits, sampling frequency, and instrument type, are also used as reference for determining parameters, so that optimal audio adjustment can be performed to suit the input devices 1a, 1b, ... 1n and output devices 6.

[0076] (5) The information about the audio signal includes information about the user of the device connected to the audio adjustment console and information about the recording of the audio signal, so various information associated with the input audio signal, such as the type and gender of the performers, the program, and the environment of the studio or hall used, can be appropriately registered or called up and used. In particular, this embodiment can be applied to mixing multiple sound sources such as multiple announcer comments, music, and VTRs, as required by broadcasting stations. As a result, it is possible to automatically perform audio adjustment that comprehensively reflects various elements required for audio adjustment without omission, and even an operator with little experience can perform audio adjustment that is comparable to that of an expert.

[0077] (6) The information on the parameters of the audio adjustment includes the types and values ​​of various parameters, information on the operator who set the parameters, and information on alarms generated by the operator or automatically when the parameters were set, so it is possible to confirm not only the parameter values ​​set during audio adjustment, but also the situation and the operator by whom the parameters were set. As a result, by referring to various information, more appropriate guidelines can be obtained when setting new parameter values ​​or correcting already-set parameter values.

[0078] In particular, as information regarding voice adjustment parameters, in addition to the parameters used in conventional voice adjustment (e.g., ratio, threshold, attack, release, frequency, etc.), it is now possible to use subjective parameters (e.g., clarity, presence, thickness, comment emphasis, senior voice, etc.), which can assist in voice adjustment to match human senses.

[0079] (7) The information set search unit 15 extracts a plurality of information sets in which the search keyword and the storage keyword match according to a predetermined criterion, performs calculation processing on a plurality of voice adjustment parameters included in the extracted plurality of information sets, and the adjustment control unit performs voice adjustment based on the parameters obtained as a result of the calculation. Therefore, when only a single information set is extracted, even if the degree of match between the storage keyword and the search keyword is high, the mismatched portion may have a large effect on the selection of parameters, and therefore it may be impossible to select the optimal parameters. However, as in this embodiment, by calculating the parameters included in the plurality of information sets by means of averaging, median selection, weighting the names of performers, programs, and past operators, the possibility of selecting extreme parameters is reduced, and high-quality voice adjustment is possible.

[0080] (8) A program progress status extraction unit 10 is provided which extracts information on the devices connected to the audio control console, information on the audio signals input / output to the devices, and changes in program progress over time from the information written in the progress chart by linking them together. Also, the information set search unit 15 extracts different information sets in response to changes in program progress over time input from the progress chart input unit 9. Therefore, even if the performers, programs, input devices 1a, 1b, ..., 1n, and output devices 6 change according to changes in program progress over time, by automatically selecting different information sets according to the program progress, appropriate audio adjustment according to the program progress can be automatically performed without the operator's operation by automatically selecting different information sets according to the program progress.

[0081] [2-2. Effects of automation configuration] (9) The output level detection unit 16 has a function of notifying the audio signal input unit 2a, 2b, ... 2n of an abnormality in the audio signal input when the signal level after the adjustment process is lower than a preset threshold value. Therefore, the operator can easily find the cause of the input abnormality by checking the status of each device connected to the audio adjustment desk and the performers using each device.

[0082] (10) The output level detection unit 16 performs a calculation process on information regarding the output level of the audio signal contained in the extracted multiple information sets, corrects the parameters on which the adjustment process was performed so that the output level becomes the output level obtained as a result of the calculation, and has the audio signal adjustment units 3a, 3b, ... 3n perform audio adjustment based on the corrected parameters.

[0083] Therefore, even if the result of adjusting the sound based on a certain information set leads to a decrease in the output level, new parameters can be generated by extracting a plurality of similar information sets and performing calculation processing such as averaging the parameters contained in those information sets or taking the median value. As a result, it becomes possible to correct the parameters, and by repeating such processing, it becomes possible to automatically correct the output level of the sound signal to an appropriate state.

[0084] (11) The gain reduction value detection unit 17 performs calculations on information regarding the gain reduction values ​​of the compressor of the audio signal that has been subjected to the adjustment process, which are included in the extracted multiple information sets, and causes the audio signal adjustment units 3 a, 3 b, ... 3 n to perform audio adjustment based on parameters that correct the gain reduction values ​​that deviate from the threshold value so as to obtain the gain reduction value obtained as the result of the calculation.

[0085] Therefore, even if the gain reduction value of the compressor deviates from the threshold value as a result of audio adjustment based on a certain information set, a new gain reduction value can be generated by extracting multiple similar information sets and performing calculation processing such as averaging the gain reduction values ​​contained in those information sets or taking the median value, etc. As a result, it becomes possible to correct the parameters based on the new gain reduction value, and by repeating such processing, it becomes possible to automatically correct the parameters of the audio signal to an appropriate state.

[0086] (12) When the balance between the direct sound and the indirect sound after the adjustment processing deviates from a preset threshold, the balance comparison unit 18 calculates information regarding the balance between the direct sound and the indirect sound of the audio signal on which the adjustment processing has been performed, corrects the parameters on which the adjustment processing has been performed so as to achieve the balance obtained as a result of the calculation, and has the audio signal adjustment units 3a, 3b, ... 3n perform audio adjustment based on the corrected parameters.

[0087] Therefore, even if the balance between direct sound and indirect sound deviates from a preset threshold as a result of audio adjustment based on a certain information set, a new balance between direct sound and indirect sound can be generated by extracting a plurality of similar information sets and performing calculation processing such as averaging the balance between direct sound and indirect sound contained in those information sets or taking the median. As a result, it becomes possible to correct the balance between direct sound and indirect sound, and by repeating such processing, it becomes possible to automatically correct the balance between direct sound and indirect sound of the audio signal to an appropriate state.

[0088] (13) The mixing balance comparison unit 19 searches for a plurality of information sets linked to information on the mixing balance when the audio signal mixing unit 4 mixes a plurality of audio signals that have been subjected to adjustment processing, and obtains the mixing balance to be used when mixing the audio by averaging or taking the median of the information on the mixing balance contained in the extracted plurality of information sets. Therefore, in addition to the audio adjustment processing, an appropriate mixing balance can be obtained by using the accumulated information when mixing the processed audio signals, and a series of processes from audio adjustment to audio mixing can be automated.

[0089] (14) When the equalizing effect or filtering effect on the audio signal after adjustment processing deviates from a preset threshold, the EQ / FIL detection unit 21 extracts a plurality of information sets, performs calculation processing on the information on the equalizing effect or filtering effect contained therein, and corrects the parameters based on the calculation results. Therefore, the audio signal adjustment units 3a, 3b, ..., 3n can automatically obtain an appropriate equalizing effect or filtering effect by controlling the equalizer or filter based on the corrected parameters.

[0090] 3. Other embodiments The present invention is not limited to the above-described embodiment, but also includes other embodiments such as the following. (1) In the embodiment, the information set generation unit 11, the storage keyword generation unit 12, and the search keyword generation unit 14 are configured so that the audio control console automatically generates the information set and each keyword, but in addition, the information set and each keyword may be generated manually.

[0091] (2) The information set is generated based on information about the equipment connected to the audio adjustment console, information about the audio signals input and output to the equipment, and information about the parameters of the audio adjustment performed on the audio signals by the audio signal adjustment units 3a, 3b, 3n. In addition to this information, other information, such as operator comments or third-party evaluations, may be input into the information input unit 7, and the information set may be generated and searched based on that information.

[0092] (3) As training data, in addition to the growth type described in the embodiment, specific condition growth type or simple growth type can be used by appropriately setting the conditions to be given to the information set generation unit 11 and the saved keyword generation unit 12. [Explanation of symbols]

[0093] 1a, 1b, 1n...Input device 2a, 2b, 2n...Audio signal input section 3a,3b,3n...Audio signal adjustment section 4...Audio signal mixing section 5...Audio signal output section 6. Output device 7. Information input section 8...Instrument, audio signal, parameter information input section 9…Progress chart input section 10…Program progress extraction section 11...Information set generation unit 12…Keyword generation section for saving 13...Storage section 14…Search keyword generation section 15...Information set search section 16...Output level detection section 17…Gain reduction value detector 18...Direct and indirect sound balance comparison section 19...Mixed balance comparison section 20...Adjustment control section 21…EQ·FIL detection section

Claims

1. an audio signal input unit to which a plurality of audio signals are input, a plurality of audio signal adjustment units that adjust the input plurality of audio signals based on predetermined parameters, an audio signal mixing unit that mixes the audio signals output from the plurality of audio signal adjustment units, and an audio signal output unit that outputs the audio signal mixed by the audio signal mixing unit; an information input unit for inputting information on a device connected to the audio adjustment console, information on an audio signal input / output to the device, and information on parameters of audio adjustment performed on the audio signal by the audio signal adjustment unit; an information set generation unit that generates one information set by linking each piece of information input to the information input unit to each other so as to include information regarding parameters of audio adjustments performed on the audio signal; a storage keyword generation unit that extracts a plurality of values ​​related to each piece of information inputted to the information input unit and / or each piece of information included in each piece of information set generated by the information set generation unit based on a predetermined criterion, and sets each of the extracted values ​​as a storage keyword for the piece of information set; a storage unit that associates each of the information sets with the keywords for storage and stores the associated information sets; a search keyword generating unit that extracts a plurality of values ​​related to each piece of information from at least one of information related to the device connected to the audio adjustment console, which is input to the information input unit when the audio signal adjustment unit performs audio adjustment, and information related to the audio signal input / output to the device, based on a predetermined criterion, and sets each of the extracted values ​​as a search keyword; an information set search unit that searches for an information set stored in the storage unit using the search keyword and the storage keyword, and extracts an information set in which the search keyword and the storage keyword match a predetermined criterion; an adjustment control unit that acquires information about parameters of sound adjustment included in the information set extracted by the information set search unit, and causes the sound signal adjustment unit to perform sound adjustment based on the acquired parameters; having The adjustment control unit is A signal output from the audio signal adjustment unit after the audio adjustment process based on the acquired parameters is input, and at least one of a signal level of the input signal, a gain reduction value of a compressor, a balance between direct sound and indirect sound, and a mixing balance of a plurality of audio signals is detected; an audio adjustment console that corrects the parameters used for the audio adjustment process when the detection result deviates from a preset value, and causes the audio signal adjustment section to perform the audio adjustment based on the corrected parameters.

2. The information set search unit extracts a plurality of information sets in which the search keyword and the storage keyword match a predetermined criterion; The audio adjustment console according to claim 1, wherein the adjustment control unit performs calculation processing on a plurality of audio adjustment parameters contained in the plurality of extracted information sets, and causes the audio signal adjustment unit to perform audio adjustment based on the parameters obtained by the calculation processing.

3. The information input unit includes: a progress table input unit for receiving a progress table of a program for which the audio signal adjustment unit is to perform audio adjustment; a program progress status extraction unit that extracts information on the device connected to the audio control console, information on the audio signal input / output to the device, and a time-dependent change in program progress from the information described in the progress table, and links the information to the device, the information set search unit extracts different information sets in response to a change over time in the program progress input from the progress table input unit; The audio adjustment desk according to claim 1 or claim 2, wherein the adjustment control unit performs different audio adjustments in accordance with changes over time in the progress of a program based on audio adjustment parameters contained in different information sets extracted by the information set search unit.

4. An audio adjustment console as described in any one of claims 1 to 3, further comprising an output level detection unit that performs adjustment processing on the input audio signal based on the acquired parameters in response to instructions from the adjustment control unit, and detects whether the signal level after the adjustment processing is lower than a certain level.

5. 5. The audio mixing console according to claim 4, wherein the output level detection section has a function of notifying an abnormality in the input of the audio signal to the audio signal input section when the signal level after the adjustment process is lower than a preset threshold value.

6. When the signal level after the adjustment process is lower than a preset threshold value, the output level detection unit searching for a plurality of information sets in which information on the audio signal input to the device having a search keyword common to the audio signal on which an adjustment process has been performed based on the acquired parameters and information on an output level of the audio signal on which an adjustment process has been performed are linked, from information on the audio signals input to the device and input to the device; The adjustment control unit performs a calculation process on information regarding the output level of the audio signal included in the extracted information sets, and adjusts the output level to the output level obtained as a result of the calculation.

5. The audio adjustment console according to claim 4, further comprising: a step of correcting the parameters on which the adjustment process has been performed; and causing the audio signal adjustment section to carry out audio adjustment based on the corrected parameters.

7. a gain reduction value detection unit that detects a gain reduction value of a compressor for the audio signal after the adjustment process; When the gain reduction value after the adjustment process is out of a preset threshold, the gain reduction value detection unit searching for a plurality of information sets in which information on the audio signal input to the device having a search keyword common to the audio signal on which an adjustment process has been performed based on the acquired parameters and information on a gain reduction value for the audio signal on which an adjustment process has been performed are linked from information on the audio signals input to the device and input to the device; The adjustment control unit performs a calculation process on information regarding the gain reduction value of the audio signal on which the adjustment process has been performed, which is contained in the extracted multiple information sets, and causes the audio signal adjustment unit to perform audio adjustment based on parameters that correct the gain reduction value that deviates from the threshold value so as to obtain the gain reduction value obtained as the calculation result.

8. a balance comparison unit that compares a direct sound and an indirect sound of the audio signal after the adjustment process, When the balance between the direct sound and the indirect sound after the adjustment process deviates from a preset threshold, the balance comparison unit searching for a plurality of information sets linking information on an audio signal input to the device having a search keyword common to an audio signal that has been subjected to an adjustment process based on the acquired parameters with information on the balance between direct sound and indirect sound for the audio signal that has been subjected to the adjustment process, from information on audio signals input to and output from the device; The adjustment control unit performs a calculation process on information regarding the balance between direct sound and indirect sound of the audio signal for which the adjustment process has been performed, which is included in the extracted multiple information sets, corrects the parameters on which the adjustment process has been performed so as to achieve the balance obtained as a result of the calculation, and causes the audio signal adjustment unit to perform audio adjustment based on the corrected parameters.

9. the audio signal mixer includes a mix balance comparator that compares mix balances of the plurality of audio signals after the adjustment process, the mixing balance comparison unit searches for a plurality of information sets in which information on the audio signals input to and output from the device, the information on the audio signals having a search keyword common to the audio signals on which adjustment processing has been performed based on the acquired parameters, and information on the mixing balance when the audio signal mixing unit mixes the plurality of audio signals on which adjustment processing has been performed, are linked together; The adjustment control unit performs a calculation process on information regarding the mixing balance by the audio signal mixing unit contained in the extracted multiple information sets, corrects the parameters on which the adjustment process was performed so as to achieve the mixing balance obtained as a result of the calculation, and causes the audio signal adjustment unit to perform audio adjustment based on the corrected parameters.

10. an EQ / FIL detection unit for detecting an equalizing effect and / or a filtering effect on the audio signal after the adjustment processing; The EQ / FIL detection unit detects whether the equalizing effect and / or the filtering effect after the adjustment process deviates from a preset threshold value, and when the equalizing effect and / or the filtering effect deviates from the threshold value, selects, from among information about audio signals input / output to a plurality of devices, information about an audio signal input to a device having a search keyword common to the audio signal that has been subjected to the adjustment process; Retrieving a plurality of sets of information associated with information regarding the equalization effect and / or filtering effect of the adjusted audio signal; The adjustment control unit performs a calculation process on information regarding equalizing effects and / or filtering effects contained in the extracted information sets, corrects parameters used for the adjustment process so as to obtain the equalizing effect or filtering effect obtained as a result of the calculation, and causes the audio signal adjustment unit to perform audio adjustment based on the corrected parameters.

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