JP2020205564A - Signal processing device, signal processing method, and program - Google Patents

Abstract

To make it easy to set a frequency in signal processing and improve convenience.SOLUTION: A signal processing device includes a sound signal input unit, an indicating unit that instructs setting of a set frequency of an effector that adds a predetermined sound effect to a sound signal, and a setting processing unit that specifies a frequency of the sound signal input from the sound signal input unit based on the instruction from the instruction unit and sets a frequency of the specified sound signal to a set frequency of the effector.SELECTED DRAWING: Figure 1

Description

The present invention relates to signal processing devices, signal processing methods, and programs.

A signal processing device using an effector such as a Parametric Equalizer (PEQ) whose parameters can be changed is known (see, for example, Patent Document 1).

U.S. Patent Application Publication No. 2005/0190930

However, in the conventional signal processing device as described above, for example, when setting a frequency to which an effector such as PEQ adds an acoustic effect, the user manually operates a controller such as a setting knob to produce sound. It was necessary to confirm the frequency and determine the target frequency. Therefore, in the conventional signal processing device, the frequency setting work is complicated.

The present invention has been made to solve the above problems, and an object of the present invention is a signal processing device, a signal processing method, and a signal processing method capable of easily setting a frequency in signal processing and improving convenience. To provide a program.

In order to solve the above problem, one aspect of the present invention includes a sound signal input unit, an instruction unit for instructing the setting of a set frequency of an effector that adds a predetermined sound effect to the sound signal, and an instruction from the instruction unit. Based on the above, the signal processing device includes a setting processing unit that specifies the frequency of the sound signal input from the sound signal input unit and sets the frequency of the specified sound signal to the setting frequency of the effector.

Further, in one aspect of the present invention, the instruction unit instructs the setting of the set frequency of the effector that adds a predetermined sound effect to the sound signal, and the setting processing unit instructs the sound signal based on the instruction from the instruction unit. This is a signal processing method in which the frequency of the sound signal input from the input unit is specified, and the frequency of the specified sound signal is set to the set frequency of the effector.

Further, one aspect of the present invention is to a computer of a signal processing device including a sound signal input unit and an instruction unit for instructing setting of a set frequency of an effector that adds a predetermined acoustic effect to the sound signal from the instruction unit. A frequency specifying step for specifying the frequency of the sound signal input from the sound signal input unit and a frequency for setting the frequency of the sound signal specified by the frequency specifying step as the set frequency of the effector based on the instruction of. It is a program for executing the setting steps.

According to the present invention, the frequency in signal processing can be easily set, and the convenience can be improved.

It is a block diagram which shows an example of the signal processing apparatus by this Embodiment. It is a flowchart which shows an example of the frequency setting process of PEQ in this embodiment. It is a flowchart which shows an example of the adjustment processing of a PEQ parameter in this embodiment. It is a flowchart which shows an example of PEQ setting processing of the signal processing apparatus in this embodiment. It is a figure which shows an example of the PEQ setting process of the signal processing apparatus in this embodiment. It is a flowchart which shows an example of the operation of PEQ in this embodiment.

Hereinafter, a signal processing apparatus and a signal processing method according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an example of the signal processing device 1 according to the present embodiment.
As shown in FIG. 1, the signal processing device 1 includes a sound signal input unit 11, a PEQ 12, a sound signal output unit 13, a frequency designation switch 14, an adjustment switch 15, and a setting processing unit 16.

The sound signal input unit 11 is an input terminal, an input connector, or the like, receives an input sound signal (input sound signal), and outputs the input sound signal to the PEQ 12 and the setting processing unit 16.

The PEQ (Parametric Equalizer) 12 (an example of an effector) adds a predetermined sound effect to the input sound signal received by the sound signal input unit 11. The PEQ12 is provided with, for example, a DSP (Digital Signal Processor), and realizes the function of a parametric equalizer by digital signal processing by the DSP. The PEQ12 executes acoustic processing that amplifies or reduces a signal level in a predetermined range centered on the set frequency, for example, based on the set frequency (set frequency) and parameters.

Here, the set frequency is, for example, the center frequency for executing the process of adding the acoustic effect by PEQ12. The PEQ 12 outputs a sound signal to which a predetermined sound effect is added to the input sound signal to the sound signal output unit 13. The parameters of PEQ12 include a gain that amplifies or reduces the signal level, a Q value that determines the bandwidth for which the gain is set, and the like.

The sound signal output unit 13 is, for example, an output terminal, an output connector, or the like, and outputs a sound signal (output sound signal) to which a predetermined acoustic effect is added by PEQ12 to the outside. The sound signal output unit 13 may include, for example, a DAC (Digital to Analog Converter) and an output amplifier.

The frequency designation switch 14 (an example of the indicator unit) instructs the setting of the set frequency of the PEQ 12 described above. The frequency designation switch 14 is, for example, a button switch or a foot switch, and when pressed by a user, a setting frequency setting instruction is output to the setting processing unit 16.

The adjustment switch 15 is, for example, an adjustment key, an adjustment knob, an adjustment knob, a slider, etc. for adjusting various parameters of the PEQ 12, receives adjustment information for adjusting various parameters from the user, and outputs the adjustment information to the setting processing unit 16.

The setting processing unit 16 specifies the frequency of the sound signal (input sound signal) input from the sound signal input unit 11 based on the instruction from the frequency designation switch 14, and sets the frequency of the specified sound signal as the set frequency of PEQ12. Set to. That is, the setting processing unit 16 outputs the frequency of the input sound signal (for example, the frequency of the fundamental tone) to PEQ12 as the set frequency, and executes the setting change of the set frequency of PEQ12. Further, the setting processing unit 16 does not change the setting of the set frequency when the frequency of the sound signal cannot be specified.

The setting processing unit 16 executes the setting change of the parameter of PEQ12 based on the adjustment information from the adjustment switch 15. The setting processing unit 16 adjusts the setting of the parameters (for example, gain and Q value) of the PEQ 12 by adjusting the adjustment switch 15.
The setting processing unit 16 includes a frequency extraction unit 161, a frequency setting unit 162, and a parameter adjustment unit 163.

The frequency extraction unit 161 extracts the frequency included in the input sound signal. The frequency extraction unit 161 acquires an input sound signal from the sound signal input unit 11 in response to an instruction from the frequency designation switch 14, and extracts the acquired input sound signal, for example, from FFT (Fast Fourier Transform) or an existing pitch. The frequency included in the input sound signal (for example, the frequency of the basic sound) is extracted by using a technique or the like. The frequency extraction unit 161 extracts the peak of the frequency of the input sound and extracts the frequency of the lowest peak corresponding to the fundamental tone.
The frequency extraction unit 161 may, for example, extract the frequency of the input sound signal first input after the instruction that the frequency designation switch 14 is pressed, or is input during the period when the frequency designation switch 14 is pressed. The frequency of the input sound signal may be extracted.

The frequency setting unit 162 specifies the set frequency based on the frequency extracted by the frequency extraction unit 161. The frequency setting unit 162 specifies, for example, the frequency of the fundamental tone extracted by the frequency extraction unit 161 as a set frequency. Specifically, in the frequency setting unit 162, for example, when the frequency extracted by the frequency extraction unit 161 constitutes a harmonic series (for example, a frequency series of base sounds, second harmonics, third harmonics, etc.), the frequency of the base sound. Is specified as the set frequency. Further, the frequency setting unit 162 can normally identify the set frequency when, for example, the frequency extracted by the frequency extraction unit 161 is not a single frequency (sine wave) and the extracted frequency does not form a harmonic series. Judge that it did not exist.

The frequency setting unit 162 sets the frequency of the input sound signal (for example, the frequency of the fundamental tone) specified as the set frequency in PEQ12. When the set frequency cannot be normally specified by the frequency setting unit 162 (when the frequency extracted by the frequency extraction unit 161 is not a single frequency (sine wave) and the extracted frequency does not form a harmonic series. ), Do not change (set) the set frequency. That is, when a single sound signal is input to the input sound signal, the frequency setting unit 162 sets the frequency of the single sound (frequency of the basic sound) in PEQ12 as a set frequency, and sets the input sound signal to a sound signal other than a single sound. Is not executed to change the setting frequency when is input.

The parameter adjustment unit 163 acquires adjustment information from the adjustment switch 15, and changes (adjusts) the parameters of PEQ 12 based on the adjustment information. For example, when the adjustment information for adjusting the gain and the Q value is acquired from the adjustment switch 15, the parameter adjustment unit 163 sets the gain and the Q value according to the adjustment information in PEQ12. The parameter adjusting unit 163 may adjust the set frequency set by the frequency setting unit 162 based on the adjustment information acquired from the adjustment switch 15.

The operation of the signal processing device 1 according to the present embodiment will be described with reference to the drawings.
First, the frequency setting process of PEQ12 in the present embodiment will be described with reference to FIG.
FIG. 2 is a flowchart showing an example of the frequency setting process of PEQ12 in the present embodiment.

As shown in FIG. 2, the setting processing unit 16 of the signal processing device 1 first determines whether or not there is an instruction from the frequency designation switch 14 (step S101). For example, the setting processing unit 16 determines whether or not the frequency designation switch 14 is pressed and the setting instruction of the set frequency of the PEQ 12 is given from the frequency designation switch 14. When there is a setting instruction from the frequency designation switch 14 (step S101: YES), the setting processing unit 16 advances the processing to step S102. Further, the setting processing unit 16 returns the processing to step S101 when there is no setting instruction from the frequency designation switch 14 (step S101: NO).

In step S102, the frequency extraction unit 161 of the setting processing unit 16 extracts the frequency from the sound signal. That is, the frequency extraction unit 161 acquires an input sound signal from the sound signal input unit 11 in response to a setting instruction from the frequency designation switch 14, and extracts the frequency included in the acquired input sound signal.

The frequency setting unit 162 of the setting processing unit 16 specifies the set frequency based on the frequency extraction result (step S103). The frequency setting unit 162 specifies, for example, the frequency of the fundamental tone extracted by the frequency extraction unit 161 as a set frequency.

The frequency setting unit 162 determines whether or not the set frequency can be normally specified (step S104). That is, whether or not the frequency setting unit 162 can normally specify the set frequency depending on whether or not the frequency extracted by the frequency extraction unit 161 is a single frequency (sine wave) or constitutes a harmonic series, for example. Is determined. When the set frequency can be normally specified (for example, the frequency of the fundamental tone can be specified) (step S104: YES), the frequency setting unit 162 proceeds to step S105. Further, when the set frequency cannot be normally specified (for example, the frequency of the fundamental tone cannot be specified) (step S104: NO), the frequency setting unit 162 returns the process to step S101 and sets PEQ12. Do not change the frequency.

In step S105, the frequency setting unit 162 sets the set frequency to PEQ12. That is, the frequency setting unit 162 outputs the specified set frequency (for example, the frequency of the fundamental tone) to PEQ12 and causes the set frequency to be set. After the processing of step S105, the frequency setting unit 162 returns the processing to step S101 and repeats the processing of steps S101 to S105.

As described above, in the frequency setting process in the present embodiment, the setting processing unit 16 specifies and specifies the frequency of the input sound signal input from the sound signal input unit 11 based on the instruction from the frequency designation switch 14. The frequency of the input sound signal (for example, the frequency of the base sound) is set to the set frequency of PEQ12.

In the process shown in FIG. 2 described above, the processes of steps S102 and S103 correspond to the frequency specifying step of specifying the frequency of the sound signal input from the sound signal input unit 11 based on the instruction from the frequency designation switch 14. To do. Further, the processes of steps S104 and S103 correspond to the frequency setting step of setting the frequency of the specified sound signal to the set frequency of PEQ12.

The parameter adjustment process of PEQ12 in the present embodiment will be described with reference to FIG.
FIG. 3 is a flowchart showing an example of the parameter adjustment process of PEQ12 in the present embodiment.

As shown in FIG. 3, the setting processing unit 16 of the signal processing device 1 first determines whether or not there is an adjustment instruction from the adjustment switch 15 (step S201). The setting processing unit 16 determines, for example, whether or not the adjustment switch 15 is adjusted and an adjustment instruction for adjusting the parameters of the PEQ 12 is given from the adjustment switch 15. The setting processing unit 16 advances the processing to step S202 when there is an adjustment instruction from the adjustment switch 15 (step S201: YES). Further, the setting processing unit 16 returns the processing to step S201 when there is no adjustment instruction from the adjustment switch 15 (step S201: NO).

In step S202, the parameter adjusting unit 163 of the setting processing unit 16 sets the parameter to PEQ12 based on the adjustment instruction. That is, the parameter adjustment unit 163 sets the parameter in PEQ12 based on the adjustment information included in the adjustment instruction from the adjustment switch 15. The parameter adjustment unit 163 outputs, for example, the gain and Q value of PEQ12 as parameters to PEQ12, and changes the parameters of PEQ12. After the processing of step S202, the parameter adjusting unit 163 returns the processing to step S201.

As described above, in the parameter adjustment process in the present embodiment, the parameter adjustment unit 163 adjusts the parameters of the PEQ 12 based on the adjustment instruction from the adjustment switch 15.

An example of the procedure of the setting process of PEQ12 in the present embodiment will be described with reference to FIGS. 4 and 5.
FIG. 4 is a flowchart showing an example of the setting process of PEQ12 of the signal processing device 1 in the present embodiment. FIG. 5 is a diagram showing an example of setting processing of PEQ12 of the signal processing device 1 in the present embodiment. In the graph shown in FIG. 5, the vertical axis represents the signal level (or gain) and the horizontal axis represents the frequency.

As shown in FIG. 4, when performing the setting process of PEQ12 in the signal processing device 1 of the present embodiment, the user first adjusts the adjustment switch 15 to set the parameter to PEQ12 (step S301). That is, the parameter adjusting unit 163 of the signal processing device 1 sets the parameter to PEQ12 by the parameter adjusting process of PEQ12 shown in FIG. 3 described above.

As a result, for example, the parameters shown in the equalizer characteristic Ec1 of FIG. 5A are set in PEQ12.
In the gain characteristic of PEQ12 shown in FIG. 5A, the equalizer characteristic Ec1 adjusts the parameter at the set frequency before the setting change (the frequency remains the previously set frequency) by the parameter adjustment process in step S301 described above. It shows the state of.

The user presses the frequency designation switch 14 and inputs a sound signal to set the set frequency to PEQ (step S302). The setting processing unit 16 of the signal processing device 1 sets the set frequency to PEQ12 by the frequency setting process of PEQ12 shown in FIG. 2 described above.

Here, the sound signal is a single sound signal, and the setting processing unit 16 transmits a single sound signal (input sound signal) via the sound signal input unit 11 in response to an instruction from the frequency designation switch 14. get. Further, the frequency extraction unit 161 of the setting processing unit 16 extracts the frequency included in the acquired input sound signal, and the frequency setting unit 162 of the setting processing unit 16 sets the frequency based on the frequency extracted by the frequency extraction unit 161. Identify the frequency. The frequency setting unit 162 sets the specified set frequency in PEQ12.

As a result, the set frequency and parameters as shown in the equalizer characteristic Ec2 of FIG. 5B are set in PEQ12.
In the gain characteristic of PEQ12 shown in FIG. 5B, the equalizer characteristic Ec2 shows a state in which the set frequency is set by the frequency setting process in step S302 described above. Further, the frequencies F1 to F3 indicate the frequencies extracted by the frequency extraction unit 161 from the input sound signal.

Since the input sound signal is a single sound, the frequency extraction unit 161 extracts, for example, the frequency F1 of the fundamental tone, the frequency F2 of the second harmonic overtone, and the frequency F3 of the third harmonic overtone.
As shown in FIG. 5B, the frequency setting unit 162 specifies the frequency F1 of the fundamental tone having the lowest frequency from the frequencies F1 to F3 as a set frequency, and sets the set frequency to PEQ12. As a result, as shown in the equalizer characteristic Ec2, the frequency F1 of PEQ12 is set as the set frequency. After the process of step S302, the setting processing unit 16 ends the setting process of PEQ12.

In the example shown in FIG. 4 described above, an example in which the set frequency is set to PEQ12 after the parameter is set to PEQ12 has been described, but the parameter may be set to PEQ12 after the set frequency is set to PEQ12. .. That is, the setting processing unit 16 of the signal processing device 1 reverses the order of the processing of step S301 and the processing of step S302 shown in FIG. 4 described above, and the setting processing unit 16 of the signal processing device 1 sets the frequency of PEQ12. After executing the setting process, the parameter adjustment process of PEQ12 may be executed.

The operation of PEQ12 in this embodiment will be described with reference to FIG.
FIG. 6 is a flowchart showing an example of the operation of PEQ12 in the present embodiment.
As shown in FIG. 6, PEQ12 first acquires an input sound signal (step S401). The PEQ 12 acquires an input sound signal via the sound signal input unit 11.

The PEQ 12 adds an acoustic effect to the input sound signal acquired by operating the PEQ according to the set frequency and parameters (step S402). The PEQ 12 adds a predetermined sound effect, for example, based on the set frequency and parameters set by the setting processing unit 16.

The PEQ 12 outputs a sound signal to which an acoustic effect is added from the sound signal output unit 13 (step S403). That is, the PEQ 12 outputs a sound signal to which a sound effect is added to the sound signal output unit 13, and the sound signal output unit 13 outputs the sound signal to the outside. After the processing of step S403, PEQ12 returns the processing to step S401 and repeats the processing of steps S401 to S403.

As described above, the signal processing device 1 according to the present embodiment includes a sound signal input unit 11, a frequency designation switch 14 (indicator unit), and a setting processing unit 16. The sound signal input unit 11 receives the input sound signal (input sound signal). The frequency designation switch 14 instructs the setting of the set frequency of the PEQ 12 (effector) that adds a predetermined acoustic effect to the sound signal. The setting processing unit 16 specifies the frequency of the sound signal input from the sound signal input unit 11 based on the instruction from the frequency designation switch 14, and sets the frequency of the specified sound signal to the set frequency of PEQ12.

As a result, the signal processing device 1 according to the present embodiment can intuitively and easily set a range (set frequency) to which a sound effect is to be added by inputting a single sound having a specific pitch such as a musical instrument sound as an input sound signal. Can be specified. Therefore, the signal processing device 1 according to the present embodiment can easily set the frequency and can improve the convenience.
The most intuitive means for a musical instrument player to express a pitch (frequency) is to produce (play) the sound of that pitch with the musical instrument. In the signal processing device 1 according to the present embodiment, the PEQ 12 can be set intuitively and easily by the user by playing the target sound with the musical instrument while pressing the frequency designation switch 14.

Further, the signal processing device 1 according to the present embodiment sets the set frequency of the PEQ 12 using the sound signal input from the sound signal input unit 11, and also uses the PEQ 12 to set the sound signal input from the sound signal input unit 11. Add sound effects. That is, in the signal processing device 1 according to the present embodiment, the set frequency setting process and the sound effect addition process can be performed on the sound signal input to one sound signal input unit 11. Therefore, in the signal processing device 1 according to the present embodiment, the cable connection of the sound signal is the same as that of the conventional PEQ, and no additional signal cable connection or a dedicated musical instrument is required. That is, since the signal processing device 1 according to the present embodiment has the same input / output interface for sound signals as the signal processing device provided with the conventional PEQ, it can be replaced as it is instead of the conventional signal processing device.

Further, the signal processing device 1 according to the present embodiment includes a PEQ 12 and a sound signal output unit 13. The PEQ 12 adds a predetermined sound effect to the sound signal input from the sound signal input unit 11 based on the set frequency set by the setting processing unit 16. The sound signal output unit 13 outputs a sound signal (output sound signal) to which a predetermined acoustic effect is added by PEQ12.
As a result, the signal processing device 1 according to the present embodiment uses the sound signal input from the sound signal input unit 11 as the input of the PEQ12 in addition to the frequency setting, and outputs the sound signal by adding the acoustic effect by the PEQ12. Can be done.

Further, in the present embodiment, the effector may include at least one of a parametric equalizer (PEQ12), a high-pass filter, and a low-pass filter.
Thereby, the signal processing device 1 according to the present embodiment can intuitively and easily set the PEQ12 in the frequency setting of the parametric equalizer (PEQ12).

Further, in the present embodiment, the setting processing unit 16 extracts the peak of the frequency of the input sound and specifies the frequency of the sound signal in the frequency specifying process of the sound signal for specifying the frequency of the lowest peak corresponding to the basic sound. If this is not possible, do not change the set frequency. That is, the setting processing unit 16 does not update the setting of the set frequency when the frequency of the sound signal cannot be specified.
As a result, the signal processing device 1 according to the present embodiment can surely set the set frequency of PEQ12 to the frequency intended by the user, for example, when a single sound is clearly input.

Further, in the signal processing method according to the present embodiment, the frequency designation switch 14 instructs the setting frequency of PEQ12 to add a predetermined acoustic effect to the sound signal received by the sound signal input unit 11 that receives the input sound signal. Then, the setting processing unit 16 specifies the frequency of the sound signal input from the sound signal input unit 11 based on the instruction from the frequency designation switch 14, and sets the frequency of the specified sound signal to the set frequency of PEQ12. ..
As a result, the signal processing method according to the present embodiment has the same effect as that of the signal processing device 1 described above, the frequency of PEQ12 can be easily set, and the convenience can be improved.

The present invention is not limited to the above embodiment, and can be modified without departing from the spirit of the present invention.
For example, in the above embodiment, an example of a parametric equalizer (PEQ12) has been described as an example of the effector, but the effector is not limited to this, and the effector includes a high-pass filter, a low-pass filter, a notch filter, and a band-pass filter. It may be applied to other effectors that require frequency setting such as.

Further, in the above embodiment, the PEQ 12 is an example in which a predetermined acoustic effect is added to a sound signal input from the same sound signal input unit 11 as the sound signal used by the setting processing unit 16 for setting the set frequency. As described above, a predetermined acoustic effect may be added to the sound signals input from different sound signal input units. For example, the signal processing device 1 includes a plurality of sound signal input units, sets a set frequency with a sound signal input to one of the plurality of sound signal input units, and inputs from the other sound signal input units. A predetermined acoustic effect may be added to the sound signal.

Further, in the above embodiment, the example in which the signal processing device 1 includes the PEQ 12 and the sound signal output unit 13 has been described, but the present invention is not limited to this, and the PEQ 12 is provided outside the signal processing device 1. A sound signal output unit 13 may be provided, and the signal processing device 1 may function as a setting device. In this case, the signal processing device 1 can be used for setting an effector such as an external PEQ, and the degree of freedom of the acoustic effect that can be easily set can be increased.

Further, in the above embodiment, the setting processing unit 16 has described an example in which one frequency such as the fundamental frequency is set in PEQ12 as a setting frequency, but the present invention is not limited to this. For example, a harmonic series such as a fundamental tone and a harmonic overtone, and a plurality of set frequencies may be set in PEQ12. In this case, the harmonic series may include low-order harmonics, even harmonics, odd harmonics, and arbitrary n harmonics.

In this way, the setting processing unit 16 may specify the frequency of the harmonic series including the fundamental tone and the harmonics of the input sound signal, and set the frequency of the specified harmonic series to the set frequency of PEQ12. As a result, the signal processing device 1 can set a plurality of frequencies at one time, and the convenience can be further improved.
Further, in the above embodiment, when a chord is input to the input sound signal instead of a single sound, the setting processing unit 16 may set the frequency for each pitch constituting the chord in the same manner.

Further, in the above embodiment, the setting processing unit 16 has described an example in which the frequency and the parameter of the PEQ 12 are set individually, but the present invention is not limited to this, and the parameter is changed in conjunction with the frequency. You may try to do so. For example, when the setting processing unit 16 sets a plurality of frequencies of the harmonic series, the gain of the harmonics may be changed (set) in conjunction with each other. In this case, the setting processing unit 16 may perform, for example, making all the gains the same by interlocking, or reducing the gain as the frequency becomes higher.

Further, in the above embodiment, the setting processing unit 16 may relatively fine-tune the set frequency by the adjustment switch 15. In addition to setting the set frequency from the input sound signal, the setting processing unit 16 may set parameters such as the gain of PEQ12 from the signal level of the input sound signal, for example. In this case, for example, the setting processing unit 16 may increase the gain when the signal level of the input sound signal is high, and decrease the gain (for example, a negative value) when the signal level is low.

Further, in the above embodiment, an example in which the setting frequency is not changed when the setting processing unit 16 cannot specify the frequency of the sound signal has been described, but further, an alarm indicating that the frequency specification has failed (for example,). , Lighting of the light emitting element indicating failure, etc.) may be notified.

Further, in the above embodiment, the signal processing device 1 may be an electronic device such as a smartphone, a tablet terminal device, or a PC (personal computer) in addition to the audio device.

Each configuration included in the signal processing device 1 described above has a computer system inside. Then, a program for realizing the functions of each configuration included in the above-mentioned signal processing device 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. Therefore, the processing in each configuration included in the signal processing device 1 described above may be performed. Here, "loading a computer system a program recorded on a recording medium and executing it" includes installing the program in the computer system. The term "computer system" as used herein includes hardware such as an OS and peripheral devices.
Further, the "computer system" may include a plurality of computer devices connected via a network including a communication line such as the Internet, WAN, LAN, and a dedicated line. Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, or a storage device such as a hard disk built in a computer system. As described above, the recording medium in which the program is stored may be a non-transient recording medium such as a CD-ROM.

The recording medium also includes a recording medium provided inside or outside that can be accessed from the distribution server for distributing the program. It should be noted that the program may be divided into a plurality of parts, downloaded at different timings, and then combined with each configuration provided in the signal processing device 1, or the distribution server for distributing each of the divided programs may be different. Furthermore, a "computer-readable recording medium" holds a program for a certain period of time, such as a volatile memory (RAM) inside a computer system that serves as a server or client when the program is transmitted via a network. It shall include things. Further, the above program may be for realizing a part of the above-mentioned functions. Further, a so-called difference file (difference program) may be used, which can realize the above-mentioned functions in combination with a program already recorded in the computer system.

Further, a part or all of the above-mentioned functions may be realized as an integrated circuit such as LSI (Large Scale Integration). Each of the above-mentioned functions may be made into a processor individually, or a part or all of them may be integrated into a processor. Further, the method of making an integrated circuit is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. Further, when an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology, an integrated circuit based on this technology may be used.

1 ... Signal processing device, 11 ... Sound signal input unit, 12 ... PEQ, 13 ... Sound signal output unit, 14 ... Frequency designation switch, 15 ... Adjustment switch, 16 ... Setting processing unit, 161 ... Frequency extraction unit, 162 ... Frequency Setting unit, 163 ... Parameter adjustment unit

Claims (8)

Sound signal input section and
An indicator that instructs the setting frequency of the effector that adds a predetermined sound effect to the sound signal, and
A signal including a setting processing unit that specifies the frequency of the sound signal input from the sound signal input unit based on the instruction from the instruction unit and sets the frequency of the specified sound signal to the set frequency of the effector. Processing equipment. The effector that adds the predetermined sound effect based on the set frequency set by the setting processing unit, and the effector.
The signal processing device according to claim 1, further comprising a sound signal output unit that outputs an output sound signal to which the predetermined sound effect is added by the effector. The signal processing device according to claim 2, wherein the effector adds an acoustic effect to a sound signal input from the sound signal input unit. The signal processing device according to any one of claims 1 to 3, wherein the effector includes at least one of a parametric equalizer, a high-pass filter, and a low-pass filter. The signal processing device according to any one of claims 1 to 4, wherein the setting processing unit does not update the setting of the set frequency when the frequency of the sound signal cannot be specified. The setting processing unit specifies the frequency of the harmonic series including the fundamental tone and the harmonics of the sound signal, and sets the frequency of the specified harmonic series to the set frequency of the effector. Any one of claims 1 to 5. The signal processing device according to the section. The indicator indicates the setting of the set frequency of the effector that adds a predetermined sound effect to the sound signal.
A signal processing method in which the setting processing unit specifies the frequency of the sound signal input from the sound signal input unit based on the instruction from the instruction unit, and sets the frequency of the specified sound signal to the set frequency of the effector. .. A computer of a signal processing device including a sound signal input unit and an instruction unit for instructing the setting frequency of an effector that adds a predetermined sound effect to the sound signal.
A frequency specifying step for specifying the frequency of the sound signal input from the sound signal input unit based on the instruction from the indicating unit, and
A program for executing a frequency setting step of setting the frequency of the sound signal specified by the frequency specifying step to the set frequency of the effector.

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