JP2022125636A - Sound signal processing device and control method thereof - Google Patents

Abstract

To output binaural-processed sound only to an appropriate output destination when the binaural processing is set to be valid.SOLUTION: A control method of a sound signal processing device is provided. A switching unit 35 selects the output destination of a sound signal from a mix bus 34 at least from a headphone 31 and a speaker 32, and a processing unit A performs A processing including at least binaural processing on a sound signal Sc to generate a sound signal Sg, and outputs the sound signal Sg to the mix bus 34. Valid/invalid of the binaural processing in the A processing is set according to the user operation. When the speaker 32 is selected as the output destination, a CPU 11 substantially makes invalid the application of at least the binaural processing of the A processing to the sound signal Sc even when the binaural processing is set to be valid.SELECTED DRAWING: Figure 6

Description

The present invention relates to a sound signal processing device and its control method.

2. Description of the Related Art Conventionally, there has been known a technique for reproducing a sense of realism as if one were there when listening through headphones by subjecting sound signals to binaural processing. However, when listening to the sound that has undergone binaural processing through a speaker, there is a sense of discomfort. In view of this, a technique has also been disclosed for switching the sounding timbre according to the connected device (Patent Document 1). For example, in Japanese Unexamined Patent Application Publication No. 2002-100000, when a specific tone color is output from headphones, a binaural tone color suitable for headphones is output.

JP 2018-10214 A

However, users do not always want to apply the binauralization process. Even when listening with headphones, there are cases where application of binaural processing is not desired.

An object of the present invention is to provide a sound signal processing apparatus and a control method thereof that can output sound that has undergone binaural processing only to an appropriate output destination when binaural processing is enabled. It is to be.

According to one aspect of the present invention, the output destination of the sound signal from the mix bus is selected from at least a first output destination and a second output destination, and the first sound signal includes at least binauralization processing. performing a first process to generate a second sound signal, outputting the second sound signal to the mix bus, setting enable/disable of the binaural conversion process in the first process, and determining whether the second output destination is When selected, even if the binauralization process is enabled, at least the binauralization process among the first processes is substantially disabled from being applied to the first sound signal. A method for controlling signal processing is provided.

According to one aspect of the present invention, when binaural processing is set to be valid, it is possible to output sound that has undergone binaural processing only to an appropriate output destination.

1 is a block diagram of a sound signal processing device; FIG. It is a block diagram which shows the structure regarding signal processing. 4 is a detailed block diagram of a processing unit; FIG. FIG. 4 is a diagram showing the flow of signals in a binauralization unit; FIG. 4 is a diagram showing a detailed configuration of DeEsser; 4 is a flowchart showing signal processing;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a sound signal processing device according to one embodiment of the present invention. This sound signal processing device 100 is configured as a mixer device as an example. The sound signal processing device 100 has a CPU 11 , and the CPU 11 exchanges information with a plurality of components via the bus 10 . The sound signal processing device 100 has a ROM 12 , a RAM 13 , a storage section 14 , a display section 15 and a setting operation section 16 . The sound signal processing apparatus 100 also has various interfaces for connecting external devices, and signals are input/output between the connected external devices and the CPU 11 via the various interfaces. Various interfaces include a communication unit 17, a first microphone input terminal 18, a second microphone input terminal 19, an AUX terminal 20, a USB terminal 21, an HDMI (registered trademark) input terminal 22, an HDMI output terminal 23, a headphone output terminal 24 and a speaker output terminal 25 are included.

A timer (not shown) is connected to the CPU 11 . The CPU 11 controls the entire device. The ROM 12 stores control programs executed by the CPU 11, various table data, and the like. The RAM 13 stores various data. The storage unit 14 stores various application programs including the control program and various data. The setting operation unit 16 receives input of various information from the user. The display unit 15 displays various information. The communication unit 17 may include a LAN interface and MIDI (Musical Instrument Digital Interface).

An external microphone can be connected to the first microphone input terminal 18 and the second microphone input terminal 19 . For example, a first microphone 26 is connected to the first microphone input terminal 18 and a second microphone 27 combined with a headphone 31 is connected to the second microphone input terminal 19 . A communication terminal device 28 such as a smart phone is connected to the AUX terminal 20 . A USB device such as a personal computer PC 29 is connected to the USB terminal 21 . An HDMI device can be connected to the HDMI input terminal 22 and the HDMI output terminal 23 . For example, the HDMI input terminal 22 is connected to the game device 30 , and the HDMI output terminal 23 is connected to the display monitor 42 . A headphone 31 is connected to the headphone output terminal 24 . A speaker 32 is connected to the speaker output terminal 25 . The speaker 32 is not limited to a 2-channel speaker, but may be a surround speaker, and the number of sounding channels is, for example, 8 channels (7.1ch).

FIG. 2 is a block diagram showing a configuration related to signal processing in the sound signal processing device 100. As shown in FIG. The sound signal processing device 100 includes processing units A, B, and C, a mix bus 34, switching units 33 and 35, and the like. The functions of the processing units A, B, and C are realized mainly by cooperation of the CPU 11, ROM 12, and RAM 13 in addition to necessary hardware. The operations of the mix bus 34 and the switching units 33 and 35 are controlled by the CPU 11 .

A signal Sd generated by the game device 30 and input from the HDMI input terminal 22 is output to the HDMI output terminal 23 and supplied to the display monitor 42 . The signal Sd includes an image signal, and an image based on the signal Sd is displayed on the display monitor 42 . The signal Sd may include a sound signal, and when an audio device is connected to the HDMI output terminal 23, sound based on the signal Sd is generated from the audio device.

A sound signal generated by the game device 30 and input from the HDMI input terminal 22 or a sound signal generated by the PC 29 and input from the USB terminal 21 is input to the processing unit A as the sound signal Sc. The sound signal Sc is a sound signal having three or more channels, and is assumed to be a signal of eight channels in this embodiment. The processing unit A generates a sound signal Sg by performing A processing (described later) on the sound signal Sc, and outputs the sound signal Sg to the mix bus 34 .

A sound signal generated by the communication terminal device 28 and input from the AUX terminal 20 or a sound signal generated by the PC 29 and input from the USB terminal 21 is input to the processing unit B as the sound signal Sb. As the sound signal Sb, for example, a voice chat sound signal is assumed. The sound signal Sb is generated by application software executed by the communication terminal device 28 or the PC 29, for example. The processing unit B performs B processing on the sound signal Sb to generate the sound signal Sf and outputs the generated sound signal Sf to the mix bus 34 .

The switching unit 33 switches between a sound signal collected by the first microphone 26 and input from the first microphone input terminal 18 and a sound collected by the second microphone 27 and input from the second microphone input terminal 19. signal and are selected exclusively. For example, when a microphone input terminal to which a microphone is connected is selected and microphones are connected to both microphone input terminals, the second microphone input terminal 19 is preferentially selected. Then, the switching unit 33 outputs the sound signal from the selected microphone input terminal to the processing unit C as the sound signal Sa.

The processing unit C performs C processing on the sound signal Sa to generate the sound signal Se and outputs the sound signal Se to the mix bus 34 . C processing includes, for example, effects and level adjustment. Further, the processing unit C outputs the generated sound signal Se to the AUX terminal 20 and the USB terminal 21 . At that time, processing such as D/A conversion and conversion to two channels may intervene. Accordingly, the sound signal Se is output to the communication terminal device 28 and PC 29 connected to the AUX terminal 20 and USB terminal 21, respectively. Depending on the settings in the communication terminal device 28 and the PC 29, a sound corresponding to the sound signal Se is generated.

Note that the A process, the B process, and the C process are different processes. Also, although the sound signal Sa is input from the microphone, it may be a signal input from a system different from the input system of the sound signal Sc. The output destination of the sound signal Se (connected to the AUX terminal 20 or the USB terminal 21) that is output without going through the mix bus 34 is the output destination of the sound signal Sh (the headphone output terminal 24 or the speaker output terminal 25). connected to ).

The mix bus 34 mixes at least the sound signal Sg and the sound signal Sf to generate the sound signal Sh. In this embodiment, the sound signal Sh is generated by mixing the sound signal Se in addition to the sound signal Sg and the sound signal Sf. The mix bus 34 outputs the sound signal Sh to the headphone output terminal 24 or the speaker output terminal 25 via the switching section 35 . Here, the sound signal Sh includes the headphone signal Sh-1 and the speaker signal Sh-2. The switching unit 35 exclusively selects the output destination of the sound signal Sh (described later).

FIG. 3 is a detailed block diagram of the processing unit A. As shown in FIG. The processing section A consists of a pre-processing section A-1 and a post-processing section A-2. The A processing consists of binaural conversion processing by the pre-processing unit A-1 and ambient sound enhancement processing by the post-processing unit A-2. The pre-processing unit A- 1 includes a binauralization unit 36 . The post-processing unit A-2 includes an MS conversion unit 37, DeEsser 38, 44, PEQs 43, 39, LR conversion unit 40, PEQ41. PEQs 43, 39, and 41 are all 4-band parametric equalizers, for example. However, the PEQs 43, 39, and 41 need not be 4-band, and may not be PEQs, and may be graphic equalizers (GEQs), for example.

FIG. 4 is a diagram showing the signal flow in the binauralization unit 36. As shown in FIG. The sound signal Sc is, for example, 7.1ch (C: center, L: front L, R: front R, SL: surround L, SR: surround R, BL: surround back L, BR: surround back R, LFE: subwoofer).

A head-related transfer function (HRTF) is an impulse response that expresses the difference in loudness, arrival time, and frequency characteristics of sound reaching the left and right ears from a virtual speaker installed at a certain position. HRTF and reverb corresponding to each signal are applied to signals other than LFE. Reverb is applied to reproduce the sense of distance from the sound source. However, since LFE is difficult to perceive localization, HRTF and reverb are not applied. The 8-channel sound signal Sc undergoes binaural conversion processing by the binaural conversion unit 36 and is converted into stereo signals, that is, into two-channel L and R stereo signals. This stereo signal is input to the MS conversion section 37 in the post-processing section A-2 as the sound signal Si.

In the post-processing section A-2 (FIG. 3), the MS conversion section 37 generates a sum signal Sj and a difference signal Sk from the sound signal Si. If the left signal of the sound signal Si is represented by L and the right signal by R, the sum signal Sj is calculated by Sj=(L of Si)/2+(R of Si)/2. The difference signal Sk is calculated by Sk=(L of Si)/2-(R of Si)/2.

FIG. 5 is a diagram showing the detailed configuration of the DeEsser 38. As shown in FIG. Since the DeEsser 44, 38 have common configurations and operations, the DeEsser 38 will be described as a representative. The DeEsser 38 includes an HPF (high-pass filter), LPF (low-pass filter), COMP (compressor), etc., and generates a sum signal Sp by performing a process of reducing sound pressure in the middle range of the sum signal Sj. The DeEsser 44 generates a difference signal Sq by processing the difference signal Sk to reduce the sound pressure in the midrange.

The PEQ 43 generates a processed sum signal Sl by performing a process of increasing the sound pressure of a predetermined band on the sum signal Sp. The PEQ 39 generates a processed difference signal Sm by processing the difference signal Sq to increase the sound pressure in a predetermined band.

For example, when playing a shooting game, the DeEsser 38 reduces the sound of gunshots caused by the game user's operations to reduce noise. In addition, PEQ39 emphasizes the sound of the side, making it easier to understand the footsteps of the shooting enemy. Therefore, although the predetermined band is not limited, it is desirable that it is a frequency band that mainly includes the surrounding sounds and is easy to sense directionality in order to make it easier to hear the surrounding sounds. By providing DeEsser and PEQ in both the system of the sum signal Sj and the system of the difference signal Sk, it becomes easy to match the phases of the processed sum signal Sl and the processed difference signal Sm. However, DeEsser 44 and PEQ 43 may be omitted if the effect of phase matching is not required.

The LR conversion unit 40 converts the post-processing sum signal Sl and the post-processing difference signal Sm into a stereo signal to generate a sound signal Sn. When the left signal of the sound signal Sn is represented by L and the right signal by R, the L signal of the sound signal Sn is calculated by Sl+Sm. The R signal of the sound signal Sn is calculated by Sl-Sm. The PEQ 41 increases or decreases the sound pressure of each band with respect to the sound signal Sn according to settings. As a result, the processing unit A outputs the sound signal Sg whose overall sound quality has been adjusted. In addition, it is not essential to provide PEQ41.

The B processing performed by the processing unit B (FIG. 2) on the sound signal Sb includes, for example, binauralization processing for voice chat. For example, at least one of HRTF and reverb is applied to the sound signal Sb to generate the sound signal Sf, which is a stereo signal. Note that the CPU 11 may switch between HRTF and reverb according to a switching instruction from the user. Also, there may be a case where neither HRTF nor reverb is applied according to a switching instruction from the user.

A detailed operation of the switching unit 35 (FIG. 2) will be described. The headphone output terminal 24 is a terminal (stereo pin jack, USB terminal, or the like) into which a plug (not shown) extending from the stereo headphone 31 is inserted. When the plug is inserted into the headphone output terminal 24 , a corresponding detection signal is sent to the CPU 11 . Upon receiving the detection signal, the CPU 11 determines whether the headphone 31 is connected to the headphone output terminal 24 or not. Note that the output destination may be specified by the user operating the setting operation unit 16 . In that case, it is not necessary to transmit a detection signal due to plug insertion, and the CPU 11 selects the output destination based on the designation by the user.

As described above, the switching unit 35 exclusively selects the output destination of the sound signal Sh under the control of the CPU 11 . For example, when the headphone 31 is connected to the headphone output terminal 24, the headphone output terminal 24 is selected as the output destination, and when the headphone 31 is not connected to the headphone output terminal 24, the speaker output terminal 25 is selected as the output destination. is selected as When the headphone output terminal 24 is selected, the headphone signal Sh- 1 is output to the headphone 31 . When the speaker output terminal 25 is selected, the speaker signal Sh- 2 is output to the speaker 32 . In addition, when the switching unit 35 outputs the sound signal Sh, level adjustment and D/A conversion may be performed. In particular, when the headphone signal Sh-1 is output, the output characteristics may be adjusted in accordance with the headphone.

Also, the user uses the setting operation unit 16 as a setting unit to input a setting instruction for enabling or disabling the binaural processing. The CPU 11 sets enable/disable of the binaural conversion processing by the binaural conversion unit 36 (FIG. 3) according to an instruction from the user via the setting operation unit 16 . The valid/invalid setting state of the binaural processing is stored in the RAM 13 . The condition for actually applying the binaural processing by the binaural processing unit 36 is that the binaural processing is set to “effective”. If the binauralization process is set to "disabled", the binauralization process is not applied.

The CPU 11 controls whether application of the binaural processing by the binaural processing unit 36 is enabled/substantially disabled. The CPU 11 enables or substantially disables the application of the binaural conversion process based on the setting state of the binaural conversion process and the determination state of whether or not the headphone 31 is connected to the headphone output terminal 24. do. For example, when disabling application of the binauralization process, the CPU 11 inputs the sound signal Si to the MS conversion section 37 through a down-mixing section (not shown) instead of the binauralization section 36 . In a downmixing section (not shown), the 8ch sound signal Si is simply downmixed into L/R 2ch signals.

Alternatively, to disable or substantially disable (substantially not apply) the application of binaural processing, the following method may be employed. First, in the normal binauralization processing by the binauralization unit 36, filter coefficients of multiple taps in the equation are respectively set when the HRTF is realized. Therefore, the degree of application of the binaural processing may be weakened by adjusting the filter coefficients of multiple taps. That is, the CPU 11 makes the parameters in the binaural processing different when substantially disabling the application of the binaural processing compared to when the application of the binaural processing is enabled. Note that setting the filter coefficients of all the taps other than one of the multiple taps to 0 is equivalent to disabling (stopping) the application of the binaural processing. From this point of view, the concept of “substantially invalid” may include not only stopping the application of binaural processing, but also weakening the degree of application of binaural processing.

FIG. 6 is a flow chart showing signal processing. This process is realized by the CPU 11 developing the program stored in the ROM 12 in the RAM 13 and executing the program. This process is started when the power of the sound signal processing device 100 is turned on or when the signal output mode is changed.

First, in step S101, the CPU 11 determines whether or not the output destination of the sound signal Sh is the headphone output terminal 24 (the headphone 31). For example, as described above, when the headphone 31 is connected to the headphone output terminal 24, the headphone output terminal 24 is determined as the output destination. As described above, when the output destination is specified by user operation, the output destination is determined based on the specification. When the output destination of the sound signal Sh is the headphone output terminal 24, the CPU 11 advances the process to step S102. On the other hand, when the output destination of the sound signal Sh is not the headphone output terminal 24, the output destination is the speaker output terminal 25 (speaker 32), so the CPU 11 advances the process to step S107.

In step S102, the CPU 11 refers to the binaural processing valid/invalid setting state stored in the RAM 13, and determines whether or not the binaural processing is set to "valid". Then, if the setting of the binaural processing is not "valid", the CPU 11 advances the process to step S107. When the setting of the binaural processing is "valid", the CPU 11 advances the process to step S103.

In step S103, as described above, in the A process, the binaural processing by the binaural processing unit 36 (FIG. 3) is applied as usual. On the other hand, in step S107, the CPU 11 substantially disables (including stopping) the application of the binaural processing by the binaural processing unit 36 in the A processing. After steps S103 and S107, the CPU 11 advances the process to step S104.

In step S104, the CPU 11 determines whether or not the output destination of the sound signal Sh is the headphone output terminal 24 (the headphone 31). Then, when the output destination of the sound signal Sh is the headphone output terminal 24, in step S105, the CPU 11 switches the output destination of the signal in the switching unit 35 to the headphone output terminal 24, and outputs the headphone signal Sh-1 to the headphone output terminal 24. Output from the headphone output terminal 24 to the headphone 31 . The headphone signal Sh-1 is a sound signal obtained by mixing the sound signal Sg and the sound signal Sf that have undergone binaural processing. Therefore, the user can listen to realistic sounds through the headphones 31 . After step S105, the CPU 11 advances the process to step S106.

As a result of determination in step S104, if the output destination of the sound signal Sh is not the headphone output terminal 24, the output destination is the speaker output terminal 25 (speaker 32), so the CPU 11 advances the process to step S108. In step S 108 , the CPU 11 switches the signal output destination of the switching unit 35 to the speaker output terminal 25 and outputs the speaker signal Sh- 2 from the speaker output terminal 25 to the speaker 32 . The speaker signal Sh-2 is a sound signal obtained by mixing the sound signal Sg and the sound signal Sf, which have not been substantially binauralized. Therefore, the user can listen to the sound without discomfort from the speaker 32 . After step S108, the CPU 11 advances the process to step S106.

In step S106, the CPU 11 executes other processing and returns the processing to step S101. In the other processes, for example, various instructions such as instructions for enabling/disabling the binaural conversion process from the user are received, and processes corresponding to the various instructions are executed. Further, the CPU 11 terminates the processing shown in FIG. 6 when the device power is turned off or when an instruction to terminate the signal output mode is received.

According to the present embodiment, the switching unit 35 as the selecting unit selects the output destination of the sound signal from the mix bus 34 from at least the headphones 31 (first output destination) and the speaker 32 (second output destination). select. A processing unit A (first processing unit) performs A processing (first processing) including at least binaural processing on the sound signal Sc (first sound signal) to generate a sound signal Sg (second sound signal). While generating, the sound signal Sg is output to the mix bus 34 . Validity/invalidity of the binaural conversion process in the A process is set according to a user operation. When the binaural conversion process is enabled and the headphone 31 is selected as the output destination, the CPU 11 as a control unit normally applies the binaural conversion process to the sound signal Sc in the A process. When the speaker 32 is selected as the output destination, the CPU 11 substantially disables the application of at least the binaural conversion process of the A process to the sound signal Sc even if the binaural conversion process is set to be valid. do. Therefore, when the binaural processing is enabled, the sound subjected to the binaural processing can be output only to the headphones 31, which are appropriate output destinations.

For example, the CPU 11 stops applying the binaural processing to the sound signal Sc. Alternatively, when the application of the binaural conversion process is substantially disabled compared to when the application of the binaural conversion process is enabled, the CPU 11 changes the parameters of the binaural conversion process to make the application of the binaural conversion process different. weaken the intensity. By these processes, it is possible to output to the speaker 32 a sound signal that is not substantially binauralized, and to output a sound that does not cause discomfort.

Further, the processing unit B (second processing unit) performs B processing (second processing) on the sound signal Sb (third sound signal) having a different number of channels from the sound signal Sc (first sound signal). It generates a sound signal Sf (fourth sound signal) and outputs the sound signal Sf to the mix bus 34 . Since the sound signal Sf is mixed with the sound signal Sg and output to the selected output destination, another sound signal with a different number of channels, such as voice chat voice, can be output together. Note that the B processing does not necessarily include the binaural processing.

Moreover, since the first output destination and the second output destination are exclusively selected, it is possible to clearly distinguish whether or not to actually apply the binaural processing according to the output destination.

Although the first output destination is the headphone 31, the headphone 31 is an example of an ear-mounted sound output device, so the first output destination may be an earphone. Therefore, the headphone signal Sh-1 that has undergone normal binaural processing can be output only to the ear-mounted sound output device.

Note that the provision of the processing unit C is not essential. Therefore, the sound signal Sh may be a signal obtained by mixing the sound signal Sg and the sound signal Sf without including the sound signal Se. In the case where the binaural conversion process is set to be effective, the effect of outputting the sound subjected to the binaural conversion process only to an appropriate output destination can be obtained by the post-processing section A- 2 is not essential. Note that the acquisition source of the sound signal Sa is not limited to the microphone.

Although the present invention has been described in detail based on its preferred embodiments, the present invention is not limited to these specific embodiments, and various forms without departing from the gist of the present invention can be applied to the present invention. included.

It should be noted that the same effect as the present invention may be obtained by reading out to the sound signal processing device 100 a storage medium storing a control program represented by software for achieving the present invention. In that case, the program code itself read from the storage medium implements the novel functions of the present invention, and the non-transitory computer-readable recording medium storing the program code constitutes the present invention. will do. Alternatively, the program code may be supplied via a transmission medium or the like, in which case the program code itself constitutes the present invention. In addition to ROM, floppy disks, hard disks, optical disks, magneto-optical disks, CD-ROMs, CD-Rs, magnetic tapes, non-volatile memory cards, etc. can be used as storage media in these cases. As non-transitory computer-readable recording media, volatile memory (e.g., DRAM (Dynamic Random Access Memory)), which holds a program for a certain period of time.

A, B, C processing unit Sc, Sg sound signal 11 CPU 31 headphone 32 speaker 34 mix bus 35 switching unit

Claims (16)

selecting the output destination of the sound signal from the mix bus from at least the first output destination and the second output destination;
performing first processing including at least binauralization processing on the first sound signal to generate a second sound signal, and outputting the second sound signal to the mix bus;
setting enable/disable of binaural processing in the first processing;
When the second output destination is selected, even if the binaural conversion process is set to be valid, at least the binaural conversion process among the first processes is not substantially applied to the first sound signal. A method of controlling a sound signal processing device that disables it. 2. Control of the sound signal processing device according to claim 1, wherein when said second output destination is selected and said binaural processing is enabled, at least said binaural processing among said first processing is stopped. Method. In contrast to the case where the first output destination is selected and the binaural conversion process is enabled, when the second output destination is selected and the binaural conversion process is enabled, the first 2. The method of controlling a sound signal processing device according to claim 1, wherein parameters in at least said binauralization processing among the processing are varied. Further, performing second processing on a third sound signal having a different number of channels from that of the first sound signal to generate a fourth sound signal, and outputting the fourth sound signal to the mix bus. 4. The control method for the sound signal processing device according to any one of 1 to 3. 5. The method of controlling a sound signal processing device according to claim 4, wherein said mix bus mixes said second sound signal and said fourth sound signal and outputs the mixture to a selected output destination. the first output destination is headphones or earphones,
6. The method of controlling a sound signal processing device according to claim 1, wherein said second output destination is a speaker. 7. The method of controlling a sound signal processing device according to claim 1, wherein said first output destination and said second output destination are exclusively selected. 8. The method of controlling a sound signal processing device according to claim 1, wherein enabling/disabling of said binaural processing in said first processing is set according to a user's operation. mixed bus and
a selection unit that selects an output destination of the sound signal from the mix bus from at least a first output destination and a second output destination;
a first processing unit that performs first processing including at least binaural processing on a first sound signal to generate a second sound signal and outputs the second sound signal to the mix bus;
a setting unit for setting enable/disable of binaural processing in the first processing;
When the second output destination is selected by the selection unit, even if the binaural conversion processing is set to be valid by the setting unit, at least the binaural conversion processing in the first processing is performed in the first processing. and a control that substantially disables application to one sound signal. 10. The sound according to claim 9, wherein when the second output destination is selected and the binaural processing is enabled, the control unit stops at least the binaural processing among the first processing. Signal processor. When the second output destination is selected and the binaural conversion process is enabled, the control unit controls the case where the first output destination is selected and the binaural conversion process is enabled. 10. The sound signal processing device according to claim 9, wherein parameters in at least said binaural processing among said first processing are made different. a second processing unit that performs second processing on a third sound signal having a different number of channels from that of the first sound signal to generate a fourth sound signal, and outputs the fourth sound signal to the mix bus; 12. The sound signal processing device according to any one of claims 9 to 11, further comprising: 13. The sound signal processing device according to claim 12, wherein said mix bus mixes said second sound signal and said fourth sound signal and outputs the mixed sound signal to a selected output destination. the first output destination is headphones or earphones,
14. The sound signal processing device according to any one of claims 9 to 13, wherein said second output destination is a speaker. 15. The sound signal processing device according to claim 9, wherein said first output destination and said second output destination are exclusively selected. 16. The sound signal processing device according to any one of claims 9 to 15, wherein enabling/disabling of said binaural processing in said first processing is set according to a user's operation.

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