JP2020160102A - Sound effect device and electronic musical instrument - Google Patents

Abstract

To provide a sound effect device and an electronic musical instrument which can simply realize a desired sound effect, when adding a plurality of kinds of effects (sound effect) to musical sound.SOLUTION: A sound effect device comprises: an effect module 50 in which a plurality of effectors (a first built-in effector 57, a second built-in effector 58, and an external effector 3) are connected in series functionally; a plurality of multipliers 591-594 disposed at least in an input side or an output side of each effector constituting the effect module 50; a RATIO operating unit 104 as a first operating unit which orders change of a first characteristic in the effect module 50; and a calculation unit 51 of a DSP 5 which collectively and simultaneously varies amplification factors of the plurality of multipliers 591-594, so that the first characteristic in the effect module 50 becomes an ordered characteristic, in response to operation of the RATIO operating unit 104.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sound effect device and an electronic musical instrument.

Conventionally, there is known a technique of applying various acoustic effects to a musical tone signal by using a plurality of acoustic effect devices.
For example, Patent Document 1 includes a sound effect device and is configured to be connectable to an external sound effect device. Either of the built-in sound effect device and the external sound effect device connected by one operation unit. A sound effect device capable of selecting the above and controlling the level of the output musical tone signal to set the depth of the acoustic effect applied to the musical tone is disclosed.

Japanese Unexamined Patent Publication No. 6-250656

However, when various acoustic effects are added to a musical sound signal by using a plurality of acoustic effect devices, the setting and the like tend to be complicated, and it is difficult to easily set the acoustic effect required by the user.
In particular, it can be obtained by connecting a plurality of effectors (pre-post relationship of connected effectors), for example, when a distortion type (distortion type) effector is included in a plurality of sound effect devices that can be switched and selected. When the sound effect changes, it becomes necessary to set and adjust each of the plurality of effectors, and it takes time and effort to obtain the desired effect.

The present invention has been made in view of the above circumstances, and is an acoustic effect device and an electronic musical instrument that can easily realize a desired acoustic effect when a plurality of types of effects (sound effects) are applied to a musical sound. The purpose is to provide musical instruments.

In order to solve the above problems, the sound effect device according to the present invention
An effect module in which multiple effectors are functionally connected in series,
At least a plurality of multipliers arranged on the input side or the output side of each effector constituting the effect module, and
A first operation unit that instructs a change of the first characteristic in the effect module, and
A control unit that simultaneously and simultaneously changes the amplification factors of the plurality of multipliers so that the first characteristic in the effect module becomes the indicated characteristic in response to the operation of the first operation unit. When,
It is characterized by having.

According to the present invention, when a plurality of types of effects (sound effects) are applied to a musical sound, it is possible to easily realize a desired acoustic effect.

It is a system configuration diagram which shows the main part configuration of the sound effect device and the peripheral device connected to this in this embodiment. It is a block diagram of a main part which shows the schematic control structure of the sound effect apparatus shown in FIG. It is a main block diagram which shows the outline of the processing in DSP in the sound effect apparatus shown in FIG. (A) and (b) are graphs showing an example of imparting a distortion effect by clipping processing. (A) is a graph showing an example of a nonlinear curve for imparting a distortion effect, and (b) is a graph showing an example of an input / output signal waveform when the nonlinear curve shown in (a) is applied to a musical tone signal. Is. (A) is a diagram showing an example of an input side table, and (b) is a diagram showing an example of an output side table. (A) is an explanatory diagram exemplifying by applying a specific numerical value to the input side table shown in FIG. 6 (a), and (b) is a specific numerical value applied to the output side table shown in FIG. 6 (b). Is an explanatory diagram illustrated by applying. It is explanatory drawing which illustrated the image at the time of having a plurality of sets of input / output tables as one modification of this embodiment. It is a top view which showed the appearance of an example of the electronic musical instrument to which the sound effect apparatus of this embodiment was applied. It is a main part block diagram which shows the functional structure of the electronic musical instrument shown in FIG.

An embodiment of the sound effect device according to the present invention will be described with reference to FIGS. 1 to 7 (a) and 7 (b). Although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

[Appearance configuration of sound effect device]
FIG. 1 is a diagram showing a schematic configuration example in a usage state in which various devices are connected to the sound effect device according to the present embodiment.
The sound effect device 1 in the present embodiment is a compact type effect device that imparts various effects (sound effects) to an input musical sound signal (hereinafter, also referred to as “input signal”).

As shown in FIG. 1, the sound effect device 1 of the present embodiment includes an external device input terminal 11 (“Input” terminal in FIG. 1) and an external device output terminal 12 (“Auto” terminal in FIG. 1). ..
The external device input terminal 11 is a terminal portion to which various electronic musical instruments and the like are connected from the outside. FIG. 1 illustrates an example in which an electric guitar 21 (hereinafter, simply referred to as a guitar) is connected as an electronic musical instrument, but the electronic musical instrument connected to the external device input terminal 11 is not limited to the guitar.
The external device output terminal 12 is for outputting a processed musical sound signal to various electronic devices by adding various effects (acoustic effects) to the musical sound signal input from an electronic musical instrument or the like connected to the external device input terminal 11. It is a terminal part. FIG. 1 illustrates an example in which a guitar amplifier 22 (hereinafter simply referred to as an amplifier) is connected as an electronic device, but the electronic device connected to the external device output terminal 12 is not limited to the amplifier.

Further, the sound effect device 1 is configured so that an external effector can be connected in addition to the built-in effector built in the device, and the sound effect device 1 is externally provided as a terminal portion for connecting the external effector 3. An effector input terminal 13 (“Send” terminal in FIG. 1) and an external effector output terminal 14 (“Return” terminal in FIG. 1) are provided.
The external effector input terminal 13 is a terminal unit that receives an input from the external effector 3, and the external effector output terminal 14 is a terminal unit that outputs to the external effector 3.
In the present embodiment, an example is shown in which a wah pedal that produces a wah effect according to a stepping motion by the user is connected as an external effector 3. The wah pedal includes a kind of bandpass filter, and is an effector of a filter system that changes the frequency band emphasized by human hearing, and is not a non-linear conversion type effector.
The external effector 3 connected to the sound effect device 1 is not limited to the wah pedal. It can be widely applied to any effect device that changes the signal level and frequency characteristics with respect to the original sound.

Further, the sound effect device 1 is provided with a bypass (BYPASS) switch 15.
The bypass switch 15 is a switch that gives an instruction to select whether to add an effect to the input signal and output it, or to bypass and output the input signal as it is without applying the effect. Is.
Further, the sound effect device 1 is provided with an indicator 16.
The indicator 16 is provided with, for example, an LED or the like, and causes the user to visually recognize whether or not the effect is applied by lighting, blinking, or the like when the effect is applied to the input signal in the sound effect device 1. It is a thing.
In the present embodiment, the content of the selection instruction input from the bypass switch 15 is reflected in the lighting / extinguishing operation of the indicator 16.

Further, the sound effect device 1 of the present embodiment has four knobs, that is, a DRIVE operation unit 10 (101), a LEVE operation unit 10 (102), a TONE operation unit 10 (103), and a RATIO operation unit 10 (104). The operation unit 10 of the above is provided. In addition, when it is simply referred to as "operation unit 10", it is assumed that four of the DRIVE operation unit 101, the LEVE operation unit 102, the TONE operation unit 103, and the RATIO operation unit 104 are included.
In the present embodiment, the sound effect device 1 incorporates a non-linear conversion type effector (first built-in effector 57 and second built-in effector 58 described later, see FIG. 3) that non-linearly converts a musical tone signal (input signal). There is. As a result, the sound effect device 1 is a distortion-type effect device capable of imparting a non-linear effect to the input signal and imparting a distortion effect as an effect.

Each of the above-mentioned operation units 10 provided in the sound effect device 1 sets parameters related to the effect (distortion effect in this embodiment), and the degree to which the knob-shaped operation unit 10 is rotated (rotation amount). The value of each parameter is set according to the operation position.
Specifically, the DRIVE operation unit 101 is a second operation for setting the value of a parameter (second parameter) that determines the amount of distortion given to the musical sound signal by the entire effect module 50 (see FIG. 3) described later. It is a department. In the present embodiment, the DRIVE operation unit 101 distorts the musical tone signal by the non-linear conversion type effector included in the effect module 50 (that is, the first built-in effector 57 and the second built-in effector 58, see FIG. 3). As a second parameter that determines the amount, the input gain of distortion is controlled.
The value of the second parameter set by the DRIVE operation unit 101 changes from 0 to 100%, and the larger the value, the larger the amount of distortion applied to the musical tone signal.
Further, the LEVEL operation unit 102 controls the output level of distortion, and the TONE operation unit 103 controls the sound quality of distortion.

Further, the RATIO operation unit 104 is a first operation unit that instructs a change of the first characteristic in the effect module 50 (see FIG. 3) described later. Here, the "first characteristic in the effect module 50" is the ratio of the amount of distortion added to the musical tone signal shared by the plurality of effectors included in the effect module 50.
In the present embodiment, the RATIO operation unit 104 sets the value of the first parameter (described later) that determines the amplification factor of one multiplier 591 to 594 (see FIG. 3, described later).

In the present embodiment, the sound effect device 1 includes an effect module 50 (see FIG. 3, which will be described later) in which a plurality of effectors are functionally connected in series. Specifically, the sound effect device 1 contains a non-linear conversion type effector that imparts a distortion effect (that is, a first built-in effector 57 and a second built-in effector 58, see FIG. 3). An external effector 3 (in this embodiment, a wah pedal) connected to the sound effect device 1 is virtually connected in series to form the effect module 50.
By operating the RATIO operation unit 104, a virtual front-back of the built-in non-linear conversion type effector (first built-in effector 57 and second built-in effector 58) and the external effector 3 (non-linear conversion type effector) The position can be controlled.
The action and effect of operating the RATIO operation unit 104 in this embodiment will be described later.

[Hardware configuration of sound effect device]
FIG. 2 is a main block diagram showing an outline of a hardware configuration example of the sound effect device according to the present embodiment.
The sound effect device 1 includes a CPU (Central Processing Unit) 4 and a DSP (Digital Signal Processor) 5.
The CPU 4 and the DSP 5 are connected via the bus 6.
The CPU 4 is a main processor that performs overall control processing of the sound effect device 1. A work RAM 41 (“CPU work RAM” in FIG. 2), which is a work area, is connected to the CPU 4.

The DSP 5 is a digital signal processing processor that realizes an effect (in this embodiment, a distortion effect, etc.).
The DSP 5 includes a calculation unit 51 and a program memory 52.
In the present embodiment, the calculation unit 51 has a plurality of multipliers 591 to 591 so that the first characteristic in the effect module becomes the indicated characteristic in response to the operation of the RATIO operation unit 104 as the first operation unit. This is a control unit that simultaneously changes the amplification factor of 594 (see FIG. 3) at once. The specific contents of the processing by DSP5 will be described later.
The program memory 52 stores various programs, data, and the like necessary for the arithmetic unit 51 to perform various processes in the DSP 5.
Further, the DSP 5 is connected to a work RAM 53 (“DSP work RAM” in FIG. 2), which is a work area, and an input / output unit for a musical tone signal.

Specifically, the input signal input from the external device input terminal 11 is input to the DSP 5 via the amplifier (analog amplifier) 81 and the A / D converter 82. Further, the signal (musical tone signal) subjected to the predetermined processing in the DSP 5 is output from the external device output terminal 12 via the D / A converters 83 and 87 and the amplifier (analog amplifier) 84.
Further, the input signal input from the external effector input terminal 13 is input to the DSP 5 via the amplifier (analog amplifier) 85 and the A / D converter 86. Further, the signal (musical tone signal) subjected to the predetermined processing in the DSP 5 is output from the external effector output terminal 14 via the D / A converter 87 and the amplifier (analog amplifier) 88.

Further, a device that cannot directly communicate with the CPU 4 using the bus 6 is connected to the bus 6 via the I / O controller 7.
In the present embodiment, the bypass switch 15 and the indicator 16 described above are connected to the I / O controller 7.
Further, the four operation units 10 of the DRIVE operation unit 101, the LEVE operation unit 102, the TONE operation unit 103, and the RATIO operation unit 104 are connected to the I / O controller 7 via the multiplexer 71 and the A / D converter 72. There is.
The four operation units 10 (that is, the DRIVE operation unit 101, the LEVE operation unit 102, the TONE operation unit 103, and the RATIO operation unit 104) output signals according to the rotation operation (rotation amount).
The multiplexer 71 is a device that selects which of the four operation units 10 is read by the A / D converter 72.
Further, the A / D converter 72 A / D-converts the output signal of the operation unit 10 selected by the multiplexer 71 from the four operation units 10. The data after A / D conversion is transmitted to the CPU 4 via the I / O controller 7 and the like, and the CPU 4 detects the rotation amount (operation position) of the operation unit 10 based on the data. As a result, the setting level of each operation unit 10 (that is, the DRIVE operation unit 101, the LEVE operation unit 102, the TONE operation unit 103, and the RATIO operation unit 104) can be grasped on the device side.

[Outline of processing in DSP]
FIG. 3 is a functional main block diagram showing an outline of processing in the DSP of the present embodiment.

As shown in FIG. 3, in the DSP 5 of the present embodiment, a plurality of effectors are virtually functionally connected in series in series to form the effect module 50.
An HPF (High-pass filter) 54 is arranged on the input side of the DSP 5 in front of a plurality of effectors (effect module 50 which is an effector group). The DC component carried on the input signal is removed or gradually reduced by passing through the HPF54.
Further, an LPF (Low-pass filter) 55 and a level adjusting unit 56 are arranged on the output side of the DSP 5 after the plurality of effectors (effect module 50 which is an effector group).
By passing the effect-processed musical tone signal in the DSP5 through the LPF55, high-frequency components are removed or gradually reduced, and the sound quality is controlled to be constant. Finally, by passing through the level adjustment unit 56, the output level of the musical tone signal is controlled and then output from the DSP 5.

Here, a plurality of effectors (effect module 50, which is an effector group) arranged in the DSP 5 will be specifically described.
The plurality of effectors constituting the effect module 50 include a built-in effector and an external effector 3. Further, the effect module 50 includes a non-linear conversion type effector and a non-linear conversion type effector.
In the present embodiment, the non-linear conversion type effector includes a first built-in effector 57 (hereinafter, also simply referred to as “effector 57”) and a second built-in effector 58 (hereinafter, simply “effector 58”), which are built-in effectors. Also called.). The effector that is not a non-linear conversion type is a wah pedal that is an external effector 3.

Specifically, in DSP5, after HPF54, the first built-in effector 57 (distortion 1 in FIG. 3 and the like) and the first built-in effector 57 (distortion 1 in FIG. 3 and the like) as the first effector which is a nonlinear conversion type effector in order from the input side of the DSP5. A second built-in effector 58 (distortion 2 in FIG. 3 and the like) as the second effector is arranged, and the first effector (first built-in effector 57) and the second effector (second built-in effector 58) are arranged. As a third effector, an external effector 3 which is a non-nonlinear conversion type effector is arranged between the two.
In this way, the external effector 3 is sandwiched between the first effector (first built-in effector 57) and the second effector (second built-in effector 58), so that the effect module 50 is a non-linear conversion type. The effectors and the non-linear transformation type effectors are arranged alternately.

Multiply before and after the effect module 50, that is, before the first effector (first built-in effector 57) (input side) and after the second effector (second built-in effector 58) (output side), respectively. A device 591 (first multiplier) and a multiplier 594 (second multiplier) are connected.
Further, in the present embodiment, a multiplier is also arranged between the first effector (first built-in effector 57) and the second effector (second built-in effector 58).
Specifically, on the input side of the second effector (second built-in effector 58) (that is, between the external effector 3 (third effector) and the second effector (second built-in effector 58)). Is connected to a multiplier 593 (fourth multiplier).
The first multiplier 591 is an input-side multiplier that adjusts the amount of distortion applied to the input signal in the first effector (first built-in effector 57), which is a non-linear conversion type effector (distortion system effector). is there.
The fourth multiplier 593 is an input-side multiplier that adjusts the amount of distortion applied to the input signal in the second effector (second built-in effector 58), which is also a non-linear conversion type effector (distortion system effector). It is a vessel.

Further, a multiplier is placed on the output side of the first effector (first built-in effector 57) (that is, between the first effector (first built-in effector 57) and the external effector 3 (third effector)). 592 (third multiplier) is connected.
The third multiplier 592 is an output-side multiplier for reverse-correcting a change on the input side in the first effector (first built-in effector 57) on the output side.
Further, the second multiplier 594 is also an output-side multiplier for reverse-correcting the input-side change in the second effector (second built-in effector 58) on the output side.
By the third multiplier 592 and the second multiplier 594, the send level of the first effector (first built-in effector 57) to the external effector 3 (third effector) and the second effector (second effector). The output level of the built-in effector 58) to the LPF55 is controlled to be an appropriate value.

Here, a process for imparting a distortion effect performed by the first effector (first built-in effector 57) and the second effector (second built-in effector 58) will be described.
As a method for imparting the distortion effect (method for realizing the distortion effect), various known methods such as a method using a clip process and a method using a non-linear curve can be used.

For example, FIGS. 4A and 4B are graphs illustrating input / output characteristics when clip processing is used as a method for imparting a distortion effect.
When a distortion effect is applied by clipping processing, the input signal is linearly amplified, the signal waveform is clipped at a predetermined level, and the amplitude of the waveform is limited.
FIGS. 4 (a) and 4 (b) show input / output characteristics when an input signal having an absolute value level of 0.5 or more is clipped to 0.5.
As shown in the examples shown in FIGS. 4A and 4B, the amplitude of the output signal is ± 0.5 by performing the clipping process for clipping the input signal whose absolute value level is 0.5 or more. It will be restricted at. For this reason, waveform distortion occurs, and overtones that are not present in the original sound are added.
FIG. 4B shows the input / output characteristics when the gain is increased and the input signal is doubled as compared with FIG. 4A. When the gain is increased as shown in FIG. 4B, the slope of the graph becomes steep, but since the clip position is the same as that shown in FIG. 4A, the amplitude of the output signal is ± 0. Limited at 5. Therefore, in this case as well, waveform distortion occurs, and overtones that are not present in the original sound are added. As the gain is increased, the clipped portion increases accordingly, so that the amount of distortion as a whole increases.

When the non-linear conversion type effector (that is, in the present embodiment, the first built-in effector 57 (distortion 1) and the second built-in effector 58 (distortion 2)) causes a distortion effect by clipping processing, the input value is If it exceeds a predetermined value, waveform distortion occurs. That is, when the input value exceeds the clipping level (in the example shown in FIGS. 4A and 4B, the absolute value level is 0.5), the distortion effect occurs.
When the clip processing is adopted to give the distortion effect, the parameter (the first) that determines the amount of distortion given to the musical sound signal by the "non-linear conversion type effector" set by the DRIVE operation unit 101, which is the second operation unit. The “value of 2 parameter)” is the value of the gain referred to here.

Further, for example, FIGS. 5 (a) and 5 (b) are graphs illustrating an example in which a nonlinear table is used as a method for imparting a distortion effect.
FIG. 5A shows an example of a nonlinear table, and FIG. 5B is a graph showing input / output characteristics when the nonlinear table shown in FIG. 5A is applied to a musical tone signal. ..
In FIG. 5 (b), the waveform of the input signal (“input” in FIG. 5 (b)) is shown by a dashed line, and the waveform of the output signal (“output” in FIG. 5 (b)) is shown by a solid line. There is.
When a table showing a non-linear curve as shown in FIG. 5 (a) is applied to a musical tone signal, an input signal that is a sine wave as shown by an alternate long and short dash line passes through the non-linear curve and has a waveform as shown by a solid line. Is output as a signal.
In this case as well, waveform distortion occurs as in the case of the clip processing shown in FIGS. 4 (a) and 4 (b), and overtones not found in the original sound are added.
The method for imparting the distortion effect is not limited to the one illustrated here, and various methods can be used.

Next, the operation of the sound effect device 1 in the present embodiment will be described.
For example, when the sound effect device 1 is used in the performance of an electronic musical instrument such as a guitar 21, the terminal for connecting the guitar 21 or the like to an external device is connected to the external device input terminal 11 of the sound effect device 1. Further, an external device such as an amplifier 22 is connected to the external device output terminal 12.
Further, when an external effector 3 such as a wah pedal is used together, the external effector input terminal 13 and the input side of the external effector 3 are connected, and the output side of the external effector 3 and the external effector output terminal 14 are connected. To do.
As a result, in the DSP5, the first built-in effector 57 (distortion 1) which is the first effector, the external effector 3 which is the third effector, and the second built-in effector 58 which is the second effector are virtually generated. An effect module 50 is configured in which (distortion 2) is functionally connected in series (see FIG. 3).

When the user plays the musical instrument (guitar 21 in the present embodiment), the original signal of the musical sound output from the musical instrument is input to the sound effect device 1 from the external device input terminal 11. The DC component of the input signal is removed or gradually reduced by passing through the HPF54.
By operating the operation unit 10 (that is, the DRIVE operation unit 101, the LEVE operation unit 102, the TONE operation unit 103, and the RATIO operation unit 104), the user can appropriately apply a desired effect (sound effect) in advance or during a performance. Set.
When the setting status of each operation unit 10 (that is, the operation position and rotation amount of the four operation units 10) is output as a signal, the output signal is A / D converted by the A / D converter 72, and the I / O controller 7 and the like Is taken into the CPU 4 via. The signal indicating the setting status of each operation unit 10 taken into the CPU 4 is used as the value of various parameters related to the effect.

For example, in the present embodiment, in particular, how much waveform distortion is generated in the sound effect device 1 as a whole with respect to the input musical sound signal by the user operating the DRIVE operation unit 101 (that is, the musical sound signal). The total amount of distortion given to is set (setting of the value of the second parameter).
Further, the user operates the RATIO operation unit 104 to set the amplification factor of one multiplier 591 to 594 (setting of the value of the first parameter). As a result, the change of the first characteristic in the effect module 50 (see FIG. 3) is instructed.
When an instruction is input by the RATIO operation unit 104, the calculation unit 51 of the DSP5, which is the control unit, keeps the amplification factor of the entire effect module 50 within a predetermined range and "first characteristic in the effect module 50". Is a part of the plurality of multipliers 591 to 594 (the first multiplier in the present embodiment) according to the operation of the RATIO operation unit 104, which is the first operation unit, so that The amplification factors of the multipliers 591 and the fourth multiplier 593) are increased, and the amplification factors of the other multipliers (the third multiplier 592 and the second multiplier 594 in the present embodiment) are decreased. Control to go.

This implementation includes two non-linear conversion type effectors (that is, a first built-in effector 57 (distortion 1) and a second built-in effector 58 (distortion 2)) virtually and functionally in the effect module 50. In the embodiment, the amount of distortion to be realized by the sound effect device 1 as a whole is set by the operation of the DRIVE operation unit 101 as described above.
In the RATIO operation unit 104, how the set distortion amount is shared by the two non-linear conversion type effectors (that is, the first built-in effector 57 (distortion 1) and the second built-in effector 58 (distortion 2)). (That is, "the first characteristic in the effect module 50") is set. That is, the first parameter set in the RATIO operation unit 104 is the amount of distortion given to the musical tone signal by the first effector 57 by changing the amplification factor of the multipliers 591 to 594, and the musical tone by the second effector 58. Determine the percentage of distortion applied to the signal. Therefore, the amount of distortion to be realized by the first built-in effector 57 (distortion 1) and the amount of distortion to be realized by the second built-in effector 58 (distortion 2) are combined and set by the operation of the DRIVE operation unit 101. The amount of distortion is 100%.

Further, when the first built-in effector 57 (distortion 1) and the second built-in effector 58 (distortion 2) are individually viewed, when a large value (gain) is applied to the multipliers 591 and 593 on the input side, The output musical sound signal is felt to be loud as a human auditory sense of volume. Therefore, in the multipliers 592 and 594 on the output side, it is necessary to perform reverse correction in order to reduce the feeling of volume.
Therefore, in order to make the output level of the signal that has passed through the first built-in effector 57 (distortion 1) and the second built-in effector 58 (distortion 2) appropriate, the first built-in effector 57 and the second A table for associating the input / output levels of signals before and after the built-in effector 58 of the above is prepared, and the calculation unit 51 of the DSP 5 appropriately refers to the table and refers to the first built-in effector 57 and the second built-in effector 58. The amplification factors of the input side multipliers 591 and 593 and the output side multipliers 592 and 594 arranged before and after the above are calculated and applied.

6 (a) and 6 (b) show an example of an input / output table prepared for each multiplier. The table shape (line inclination, etc.) and each value in the illustrated example are examples, and the input / output table is not limited to these.
FIG. 6A is a diagram showing an example of an input table showing the operation of the multipliers 591 and 593 on the input side, and FIG. 6B is an output table showing the operation of the multipliers 592 and 594 on the output side. It is a figure which shows an example. In FIGS. 6 (a) and 6 (b), the X-axis corresponds to the ratio of the operating range of the multipliers 591 to 594, and the value increases or decreases when the user operates the operation unit 10 (DRIVE operation unit 101 or the like). Is. That is, as the input gain is increased by operating the DRIVE operation unit 101 or the like, the value gradually approaches 100% from 0% shown in FIGS. 6A and 6B. Further, the Y-axis shows a value corresponding to a magnification (amplification factor) corresponding to the input gain.
Note that, in FIGS. 6 (a) and 6 (b), the absolute value level of the input signal as a reference is obtained in the case of performing the clip process illustrated in FIG. 4 (a) as the process of applying the distortion effect to the signal. Is expressed as an example when 0.25 is set.

In the examples shown in FIGS. 6A and 6B, the region in which the signal change width is 0 to 6 dB for both input and output corresponds to a linear region in which the signal changes linearly.
In this linear region, the input multipliers 591 and 593 operate 1 to 2 times (0 dB to 6 dB). Further, the multipliers 592 and 594 on the output side operate 1 to 0.5 times (0 dB to -6 dB).
Within this range, the signal is not distorted, and the operation is a value for applying reverse correction corresponding to the input level input to the multipliers 591, 593 on the input side (that is, when the input level is large). A value corresponding to this is small, and when the input level is small, a value corresponding to this is large) is given to the multipliers 592 and 594 on the output side. As a result, it is possible to reverse-correct the change in the signal on the input side on the output side and output a signal having an appropriate volume or the like.

On the other hand, regions other than the above correspond to non-linear regions that change non-linearly.
In this non-linear region, the input multipliers 591 and 593 operate 2 to 4 times (6 dB to 12 dB). Distortion occurs in the signal due to clipping processing. Further, the multipliers 592 and 594 on the output side operate 0.5 times to 0.35 times (−6 dB to −9 dB).
In the non-linear region, the upper limit of the amplitude of the signal waveform is determined by the distortion level, so even if the gain on the input side is increased, the level change gradually becomes smaller. Therefore, in the non-linear region, the value of the correction applied to the multipliers 592 and 594 on the output side gradually becomes smaller and has a gentle slope.
As a result, in both the linear region and the non-linear region, the change in the signal on the input side can be reversely corrected on the output side, and a signal having an appropriate volume or the like can be output.

Further, in the present embodiment, as described above, the input-side multipliers 591 and 593 and the output-side multipliers 592 and 592 of the first built-in effector 57 (distortion 1) and the second built-in effector 58 (distortion 2) are respectively. Each of the 594s has a correlation that needs to be coordinated with each other.
That is, in addition to adjusting the input / output levels of the effectors 57 and 58 shown in FIGS. 6A and 6B, the amount of distortion to be realized by the two effectors 57 and 58 to which the distortion effect is applied is shared. It is necessary to adjust the two effectors 57 and 58 so that the set strain amount is 100%.
Therefore, from the above relationship, when the calculation unit 51 of the DSP 5 sets the value of the first parameter that determines the amplification factor of one multiplier 591 to 594 by the operation of the RATIO operation unit 104, the other The amplification factors of the multipliers 591 to 594 of the above are also interlocked with this, and are collectively changed at the same time.

The input table in the multipliers 591 and 593 on the input side of the effectors 57 and 58 and the output table in the multipliers 592 and 594 on the output side have, for example, the following configurations. In the following, the value of the first parameter set by the operation of the RATIO operation unit 104 is defined as the R value, and the value of the second parameter set by the operation of the DRIVE operation unit 101 is defined as the D value.
Input table in the multiplier 591 on the input side of the first built-in effector 57 (distortion 1): D value × (100-R value) / 100
Output table in multiplier 592 on the output side of the first built-in effector 57 (distortion 1): D value × (100-R value) / 100
Input table in the multiplier 593 on the input side of the second built-in effector 58 (distortion 2): D value × R value / 100
Output table in multiplier 594 on the output side of the second built-in effector 58 (distortion 2): D value x R value / 100

The value (R value) of the first parameter set by the operation of the RATIO operation unit 104 can be changed from 0 to 100% by the operation of the user, and the set R value and the first built-in The relationship between the strain amount shared by the effector 57 (distortion 1) and the second built-in effector 58 (distortion 2) is as follows.
That is, for example, when the R value is 100%, the first built-in effector 57 (distortion 1) in the previous stage does not work, the second built-in effector 58 (distortion 2) is selected, and the DRIVE operation unit 101 Responsible for 100% of the distortion amount set by the operation.
In this case, the virtual position of the external effector 3 in the effect module 50 as the effector group can be regarded as the position before the distortion. That is, the musical tone signal passing through the effect module 50 is first subjected to the wah effect by the external effector 3, and then the distortion effect by the second built-in effector 58 (distortion 2) is applied.

Further, when the R value is 0%, the second built-in effector 58 (distortion 2) in the subsequent stage does not work, the first built-in effector 57 (distortion 1) is selected, and the DRIVE operation unit 101 is operated. Responsible for 100% of the set distortion amount.
In this case, the virtual position of the external effector 3 in the effect module 50 as the effector group can be regarded as the position after the distortion. That is, the musical tone signal passing through the effect module 50 is first given a distortion effect by the first built-in effector 57 (distortion 1), and then a wah effect by the external effector 3 is applied.

When the R value is 50%, the share of the amount of distortion by the first built-in effector 57 (distortion 1) and the second built-in effector 58 (distortion 2) is 50% each, and the external effect module 50 is external. The virtual position of the effector 3 can be regarded as an intermediate between the first built-in effector 57 and the second built-in effector 58.
That is, in this case, the musical tone signal passing through the effect module 50 is first given a distortion effect of 50% of the distortion amount set by the operation of the DRIVE operation unit 101 by the first built-in effector 57 (distortion 1). After that, the wah effect by the external effector 3 is applied, and the distortion effect of the remaining 50% is further imparted by the second built-in effector 58 (distortion 2).
As described above, in the present embodiment, the effect module 50 is selected by operating the RATIO operation unit 104 to select the share ratio of the first built-in effector 57 (distortion 1) and the second built-in effector 58 (distortion 2). The virtual position of the external effector 3 inside can be freely set.

7 (a) and 7 (b) show the R value set by the operation of the RATIO operation unit 104 in the input / output tables shown in FIGS. 6 (a) and 6 (b), and the DRIVE operation unit 101. It is explanatory drawing which specifically applied the D value set by an operation.

First, in FIGS. 7A and 7B, the characteristics and output of the multiplier 591 on the input side of the first built-in effector 57 (distortion 1) when the D value = 100% and the R value = 20%. The characteristics of the multiplier 592 on the side are shown by an alternate long and short dash line (thick line).
In this case, the value on the X-axis is 20%, the value on the Y-axis is about 3.9 dB in the multiplier 591 on the input side (FIG. 7 (a)), and -3 in the multiplier 592 on the output side. It is about 0.8 dB (FIG. 7 (b)).
Similarly, when the D value = 100% and the R value = 20%, the characteristics of the multiplier 593 on the input side and the characteristics of the multiplier 594 on the output side of the second built-in effector 58 (distortion 2) are shown as a chain line (thin line). ).
In this case, the value on the X-axis is 80%, the value on the Y-axis is about 10.1 dB in the multiplier 592 on the input side (FIG. 7 (a)), and -8 dB in the multiplier 594 on the output side. Degree (FIG. 7 (b)).

Further, the characteristics of the multiplier 591 on the input side and the characteristics of the multiplier 592 on the output side of the first built-in effector 57 (distortion 1) when the D value = 80% and the R value = 60% are shown by a two-dot chain line (thick line). ).
In this case, the value on the X-axis is 60 × 80 = 48%, the value on the Y-axis is about 7.7 dB in the multiplier 591 on the input side (FIG. 7 (a)), and the multiplier on the output side. In 592, it is about −6.8 dB (FIG. 7 (b)).
Similarly, when the D value = 80% and the R value = 60%, the characteristics of the multiplier 593 on the input side and the characteristics of the multiplier 594 on the output side of the second built-in effector 58 (distortion 2) are shown by a chain double-dashed line (dashed line). (Thin line).
In this case, the value on the X-axis is 40 × 80 = 32%, the value on the Y-axis is about 5.2 dB in the multiplier 592 on the input side (FIG. 7 (a)), and the multiplier on the output side. In 594, it is about −5.9 dB (FIG. 7 (b)).

Further, the characteristics of the multiplier 591 on the input side and the characteristics of the multiplier 592 on the output side of the first built-in effector 57 (distortion 1) when the D value = 60% and the R value = 40% are shown by broken lines (thick lines). Shown.
In this case, the value on the X-axis is 40 × 60 = 24%, the value on the Y-axis is about 4.2 dB in the multiplier 591 on the input side (FIG. 7 (a)), and the multiplier on the output side. In 592, it is about -4.3 dB (FIG. 7 (b)).
Similarly, when the D value = 60% and the R value = 40%, the characteristics of the multiplier 593 on the input side and the characteristics of the multiplier 594 on the output side of the second built-in effector 58 (distortion 2) are shown by broken lines (thin lines). Indicated by.
In this case, the value on the X-axis is 60 × 60 = 36%, the value on the Y-axis is about 6.1 dB in the multiplier 592 on the input side (FIG. 7 (a)), and the multiplier on the output side. In 594, it is about −6.1 dB (FIG. 7 (b)).

As described above, since the set value of the amplification factor in each multiplier 591 to 594 is uniquely determined by referring to the tables as shown in FIGS. 7 (a) and 7 (b), the calculation unit 51 of the DSP 5 is used. , The amplification factor in each multiplier 591-594 can be appropriately set by referring to the table.

The musical sound signal to which the effect (acoustic effect) is added in the DSP 5 is output after being appropriately D / A converted.
In general, when a discrete value is set in the multiplier, it is preferable to give the value continuously by controlling the envelope so that noise does not appear in the output signal.
Although description will be omitted in this embodiment as well, it is preferable to continuously give values by envelope control when setting values in the multipliers 591 to 594.

[About the effect of the sound effect device]
As described above, according to the present embodiment, the sound effect device 1 is functionally connected in series with a plurality of effectors (first built-in effector 57, second built-in effector 58, external effector 3, etc.). The effect module 50, at least the multipliers 591 and 594 arranged on the input side and the output side of the effect module 50, and the "first characteristic in the effect module 50" (the first that determines the amplification factor of one multiplier). Control to change the amplification factor of each multiplier 591 to 594 at the same time according to the operation of the RATIO operation unit 104 as the first operation unit for setting the value of the parameter) and the RATIO operation unit 104. The calculation unit 51 of the DSP 5 as a unit is provided.
As a result, the sound effect device collectively controls the operations of the plurality of effectors (first built-in effector 57, second built-in effector 58, external effector 3, etc.) constituting the effect module 50 by the operation of the RATIO operation unit 104. can do.
As a result, even when a plurality of effectors (first built-in effector 57, second built-in effector 58, external effector 3, etc.) are provided, the user does not need to individually set a plurality of parameters, and a desired sound can be easily obtained. The effect can be obtained.

Further, in the present embodiment, the multiplier is also arranged between a plurality of effectors (first built-in effector 57, second built-in effector 58, external effector 3, etc.).
This makes it possible to adjust the input / output for each effector.

Further, in the present embodiment, the plurality of effectors (first built-in effector 57, second built-in effector 58, external effector 3, etc.) include a non-linear conversion type effector that non-linearly converts a music signal, and the effect module 50. In the above, non-linear conversion type effectors (first built-in effector 57 and second built-in effector 58) and non-non-linear conversion type effectors (wow pedal which is an external effector 3) are alternately arranged.
The non-linear conversion type effector that non-linearly converts the musical tone signal (the first built-in effector 57 and the second built-in effector 58 that impart a distortion effect in the present embodiment) is used when performing various effect processing on the musical tone signal. The signal characteristics after processing differ greatly depending on whether it is performed before or after other effect processing.
For this reason, there is a great demand for adjusting the order and degree of action on musical tones depending on what kind of sound (sound quality, etc.) is desired.
In this respect, according to the present embodiment, it is possible to adjust how to utilize the effect effect of the non-linear conversion type effector and the non-linear conversion type effector only by operating the RATIO operation unit 104.

Further, in the present embodiment, the effect module 50 is a first effector and a second effector which are non-linear conversion type effectors (in the present embodiment, the first built-in effector 57 and the second built-in effector 58 which impart a distortion effect). ) And a third effector which is a non-non-linear conversion type effector (in this embodiment, an external effector 3 which is a wow pedal), and the third effector is a first effector and a second effector. It is placed between and.
As described above, in the case of the sound effect device 1 including a plurality of effectors, the effect effect obtained by arranging the nonlinear conversion type effector (the effector that imparts the distortion effect in the present embodiment) before or after the other effector can be obtained. to differ greatly.
In this regard, by sandwiching the first effector, which is a non-linear conversion type effector, and the third effector, which is a non-linear conversion type effector, between the second effector, the RATIO operation unit 104 that sets the value of the first parameter is operated. By simply doing so, the virtual position of the third effector, which is a non-linear conversion type effector sandwiched between them, can be easily adjusted.

Further, in the present embodiment, the first parameter is the amount of distortion given to the musical tone signal by the first effector (first built-in effector 57) by changing the amplification factor of the multipliers 591 to 594, and the second. The ratio of the amount of distortion applied to the musical tone signal by the effector (second built-in effector 58) is determined.
As a result, when the first effector which is a non-linear conversion type effector and the third effector which is a non-non-linear conversion type effector are sandwiched between the first effector and the second effector, the RATIO operation unit 104 for setting the value of the first parameter is formed. Virtual position of external effector 3 which is a third effector which is a non-non-linear conversion type effector sandwiched between a first built-in effector 57 and a second built-in effector 58 which give a distortion effect only by operation. Can be easily adjusted.

Further, in the present embodiment, the non-linear conversion type effector is an effector that causes waveform distortion when the input value exceeds a predetermined value, for example, imparts a distortion effect by clipping processing.
Therefore, it is possible to easily set from what input level the distortion effect should be applied simply by adjusting the clip position.

Further, in the present embodiment, the DRIVE operation unit 101 as a second operation unit for setting the value of the second parameter that determines the amount of distortion applied to the musical sound signal by the non-linear conversion type effector is provided, and the control unit is used. The calculation unit 51 of the DSP 5 changes the amplification factor of the multipliers 591 to 594 in consideration of the operation of the DRIVE operation unit 101.
As a result, the user can set the amount of distortion to be realized in the sound effect device 1 as a whole.

Further, in the present embodiment, in addition to the built-in effector built in the device (the first built-in effector 57 and the second built-in effector 58 that impart a distortion effect in the present embodiment), the external effector 3 (in the present embodiment). The plurality of effectors that are configured to be connectable to a wah pedal and constitute the effect module 50 include a built-in effector and an external effector.
In this way, the external effector 3 can be connected to the sound effect device 1, and the external effector 3 can be included in the virtual effector group inside the sound effect device 1, thereby producing various effect effects. It is possible to easily realize the original system to make it.

<< Modification example >>
Although the embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to such embodiments and can be variously modified without departing from the gist thereof.

For example, in the above embodiment, the case where the non-linear conversion type effector is a distortion type effector that generates waveform distortion by clip processing or non-linear processing is illustrated, but the non-linear conversion type effector is the one illustrated in this embodiment. Not limited.
As a distortion type effector, overdrive, fuzz, or the like may be applied in addition to distortion. Further, as the non-linear conversion type effector, a so-called dynamics type effector such as a compressor, a limiter, or an exciter may be applied.
Further, as an effector that is not a non-linear conversion type, an equalizer or the like may be applied in addition to the wah (wah pedal) exemplified in this embodiment.

Further, in the above embodiment, as the configuration of the effect module 50, a first effector which is a non-linear conversion type effector and a third effector (a wah pedal which is an external effector 3) which is a second effector and is not a non-linear conversion type effector. ) Is illustrated, but the configuration of the effect module 50 is not limited to this.
The effect module 50 may be a module in which a plurality of effectors are functionally connected in series. For example, a non-linear conversion type effector and a non-linear conversion type effector are connected in series one by one. There may be. Further, for example, four or more non-linear conversion type effectors and non-linear conversion type effectors may be alternately connected.

Further, the plurality of effectors constituting the effect module 50 do not have to include one that imparts a distortion effect as an acoustic effect. That is, the plurality of effectors may be only non-linear conversion type effectors, or may be only non-linear conversion type effectors.
Further, as in the present embodiment, the first type of effector (in the present embodiment, the first built-in effector 57 which is the first effector and the first built-in effector 58 which is the second effector) and this. It may be a third effector (external effector 3 in this embodiment), which is a second type of effector different from the first type.
When the effect module 50 includes a plurality of types of effectors, the arithmetic unit 51 of the DSP5 as a control unit may and the effector of the first type in the effect module 50 according to the operation of the RATIO operation unit 104 as the first operation unit. The virtual connection position with the second type effector is changed.

Further, in the above embodiment, the calculation unit 51 of the DSP 5 applies the first parameter value (value corresponding to the first characteristic in the effect module 50) set in the RATIO operation unit 104 to one table, and all of them are applied. Although the case of calculating the amplification factor of the multipliers 591 to 594 is illustrated, the setting of the amplification factor of the multipliers 591 to 594 by the calculation unit 51 of the DSP 5 is not limited to the case of the method of the present embodiment.
For example, as shown in FIG. 8, a plurality of patterns that can be set in the RATIO operation unit 104 may be prepared in advance as a table.

In FIG. 8, the input-side multiplier 591 and the output-side multiplier 592 of the first built-in effector 57 (distortion 1), the input-side multiplier 593 and the output-side multiplier of the second built-in effector 58 (distortion 2) An example in which a table 61 (61a, 61b, 61c, 61d) is provided for each of the multipliers 594, and 10 sets of table sets 60 including these four tables 61 (61a, 61b, 61c, 61d) as one set are prepared. Shown.
That is, as shown in FIG. 8, the tables “input side Table 1-1” to “input side Table 1-10” for setting the value of the multiplier 591 on the input side of the first built-in effector 57 (distortion 1), Tables for setting the value of the multiplier 592 on the output side of the first built-in effector 57 (distortion 1) "output side Table 1-1" to "output side Table 1-10", the second built-in effector 58 (distortion 2). ), The table for setting the value of the multiplier 593 on the input side "input side Table 2-1" to "input side Table 2-10", the multiplier 594 on the output side of the second built-in effector 58 (distortion 2). Tables "output side Table 2-1" to "output side Table 2-10" for setting values are prepared, and 10 sets of 4 sets are stored in each set. The number of table sets 60 to be prepared is not limited to 10, and may be at least more than this.

In this case, the user sets 10 sets of the input side table and the output side table of the first built-in effector 57 (distortion 1) and the second built-in effector 58 (distortion 2) by the operation of the RATIO operation unit 104. Select one of the 60 table sets (10 levels).
Each table 61a to 61d has 100 elements corresponding to the values 0 to 99 set by the operation of the DRIVE operation unit 101, for example.
When any of the table sets 60 is selected, the calculation unit 51 of the DSP 5 refers to each of the tables 61a to 61d according to the value set by the operation of the DRIVE operation unit 101 in each of the multipliers 591 to 594. The value of the amplification factor is obtained, and the effect processing corresponding to the setting by the operation of the RATIO operation unit 104 is performed.

As described above, a plurality of table groups (table set 60) in which the amplification factors of the multipliers 591 to 594 are defined corresponding to the values of the first parameter are prepared, and the RATIO operation which is the first operation unit is prepared. One table set 60 is selected according to the operation of the unit 104, and the calculation unit 51 of the DSP5, which is a control unit, refers to the selected one table set 60 and amplifies each multiplier 591 to 594. If the rates are changed all at once, the user cannot set the numerical value linearly by operating the RATIO operation unit 104. However, the effect (sound effect) by the sound effect device 1 can be easily realized only by selecting one of the prepared table sets 60.
In the non-linear conversion type effector, how to apply the effect to the signal is complicated, and the input side multiplier 591, the output side multiplier 592, and the second built-in effector 58 of the first built-in effector 57 (distortion 1) ( It is difficult for the arithmetic unit 51 of the DSP 5 to uniquely determine the amplification factors of the multiplier 593 on the input side and the multiplier 594 on the output side of the distortion 2). In this regard, by deciding the combination in advance and creating a table, it is possible to optimize the processing with high accuracy while simplifying the processing by the calculation unit 51 of the DSP5.
Further, depending on how the table is set, it is possible to assign more complicated operations to the effectors 57 and 58 by operating the RATIO operation unit 104.

In this case, in order to reduce the number of tables 61a to 61d, the tables may be interpolated and used.
Moreover, the way of holding the table is not limited to the one illustrated here.
For example, a plurality of patterns that can be set in the DRIVE operation unit 101 may be prepared as a table in advance. In this case, each table has 100 elements corresponding to the values 0 to 99 set by, for example, the operation of the RATIO operation unit 104. When any table set is selected by the operation of the DRIVE operation unit 101, the calculation unit 51 of the DSP 5 refers to each table according to the value set by the operation of the RATIO operation unit 104, and appropriately performs effect processing. Do.

Further, in the present embodiment, the case where the sound effect device 1 is a single effect device is illustrated, but the sound effect device may be incorporated inside various electronic musical instruments as one functional unit.
When the sound effect device 1 as shown in the present embodiment is incorporated as a functional part in an electronic musical instrument provided with sound source data and playing means, various effect effects can be easily and freely given to musical sounds. It is possible to easily realize a variety of performances.
For example, an example in which a sound effect device similar to that of the present embodiment is incorporated in an electronic keyboard instrument (electronic piano, keyboard, etc.) as an electronic musical instrument will be described below.

FIG. 9 is an external view showing an appearance of an example of an electronic keyboard instrument, and FIG. 10 is a block diagram of a main part showing a configuration example of hardware of the electronic keyboard instrument shown in FIG.

In FIGS. 9 and 10, the electronic keyboard instrument 9 includes a keyboard 91 on one side of the musical instrument housing 90. The keyboard 91 is arranged in the longitudinal direction of the musical instrument housing 90, and has a plurality of keys as a performance operator that generates a signal corresponding to a performance input (press / release key operation). The signal generated by the keyboard 91 (individual keys constituting the keyboard 91) is detected by the key scanner 911 that scans the keys, and is further taken into the CPU 96 via the I / O controller 912.
Further, a portion of the musical instrument housing 90 other than the keyboard 91 is an operation panel surface, and the operation panel surface includes a switch panel 92 having a group of buttons for performing various inputs and settings. An LCD (Liquid Crystal Display) 93 or the like is provided as a display unit for displaying various setting information and the like.
The event of each operation switch generated by the switch panel 92 is detected by the key scanner 911 and further captured by the CPU 96 via the I / O controller 912.
The LCD 93 displays, for example, the setting state and the operating state of each part of the musical instrument on the screen by supplying the display control signal generated by the CPU 96 to the LCD controller 931 via the I / O controller 912.
A bender / modulation wheel 94 for adding various modulations (performance effects) such as pitch bend, tremolo, and vibrato is provided on the side portion (left portion in FIG. 9) of the operation panel surface of the musical instrument housing 90.
The bender output and the modulation output generated in response to the wheel rotation operation of the bender / modulation wheel 94 are A / D converted by the A / D converter 941 and then taken into the CPU 96 via the I / O controller 912.

Further, to the electronic keyboard instrument 9, an external device (not shown) conforming to the MIDI standard, such as a device for generating performance data represented by a MIDI-format note-on / note-off event, is connected to a MIDI terminal (not shown). It is possible to do. When such an external device is connected to the electronic keyboard instrument 9, the data generated by the external device is taken into the CPU 96 via the MIDI interface (MIDII / F in FIG. 10) 95.

Further, the electronic keyboard instrument 9 includes a CPU 96 and a sound source LSI 97 connected to the bus 99.
The CPU 96 sends and receives various data via various functional units connected to the I / O controller 912 and MIDII / F95. The data (performance data, etc.) received by the CPU 96 is appropriately supplied to the sound source LSI 97.
The CPU 96 controls the entire electronic keyboard instrument 9 based on various control programs stored in the CPU ROM 961 and various control data associated therewith. A CPU work RAM 962 constituting a work area is connected to the CPU 96.

The sound source LSI 97 is a dedicated IC that executes a musical sound generation process. The sound source LSI 97 has a waveform generator 971 and a DSP 973.
The waveform generator 971 is an oscillator (oscillator) that generates a waveform of a predetermined timbre corresponding to a performance operation.
The waveform generator 971 reads waveform data from the sound source ROM 972, which is a waveform memory, at a speed corresponding to the pitch of the key instructed in the performance operation, and has a velocity instructed in the performance operation with respect to the read waveform data. An amplitude envelope is added, and the resulting waveform data is output as sound source data corresponding to the performance operation.

DSP973 is a signal processing circuit that adds an effect (acoustic effect) to an audio signal.
In this modification, the DSP 973 functions as a sound effect device incorporated in the electronic keyboard instrument 9.
That is, the DSP 973 adds an envelope corresponding to the musical tone parameter supplied from the CPU 96 to the musical tone type data (musical tone signal) output from the waveform generator 971, and inputs the musical tone data (musical tone signal) by the user on the switch panel 92 or the like. Adds effect processing based on the set effect instructions and outputs as output musical tone data.

In the case of this modification, an effect module 50 in which a plurality of effectors are virtually and functionally connected in series is configured inside the DSP 973, similar to the DSP 5 shown in FIG.
Then, the calculation unit (not shown) in the DSP 973 is combined with the calculation unit 51 of the DSP 5 according to the value of the first parameter (that is, the parameter that determines the amplification factor of one multiplier) set in the switch panel 92 or the like. Similarly, a process of simultaneously changing the amplification factors of each multiplier (processes as illustrated in FIGS. 7A and 7B) is performed.
As a result, a desired effect can be easily added to the musical tone signal by the user simply inputting and setting the value of the first parameter on the switch panel 92 or the like.

A predetermined effect is given by the DSP 973 of the sound source LSI 97, and the output waveform data is D / A converted into an analog signal format music signal by the D / A converter 975, and the signal is amplified to a predetermined level by the amplifier 976. After that, the sound is emitted from the speaker 98 as a music sound. The output of the musical tone signal is not limited to the sound emitted from the speaker 98, and may be output from headphones or the like via an output terminal (not shown).

Although some embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and the equivalent scope thereof. ..
The inventions described in the claims originally attached to the application of this application are added below. The item number of the claim described in the appendix is the scope of the claims originally attached to the application of this application.
[Additional Notes]
<Claim 1>
An effect module in which multiple effectors are functionally connected in series,
At least a plurality of multipliers arranged on the input side or the output side of each effector constituting the effect module, and
A first operation unit that instructs a change of the first characteristic in the effect module, and
A control unit that simultaneously and simultaneously changes the amplification factors of the plurality of multipliers so that the first characteristic in the effect module becomes the indicated characteristic in response to the operation of the first operation unit. When,
Sound effect device equipped with.
<Claim 2>
The control unit operates the first operation unit so that the first characteristic of the effect module becomes the indicated characteristic while maintaining the amplification factor of the entire effect module within a predetermined range. The acoustic according to claim 1, wherein the amplification factor of some of the plurality of multipliers is increased and the amplification factor of the other multiplier is decreased accordingly. Effect device.
<Claim 3>
In the effect module, at least the first effector is functionally connected to the input side of the effect module, and the second effector is functionally connected to the output side of the effect module.
The plurality of multipliers include a first multiplier arranged on the input side of the first effector, a second multiplier arranged on the output side of the second effector, and the first effector. Includes a third multiplier located between the second effector and the second effector.
In response to the operation of the first operation unit, the control unit has the first multiplier, the second multiplier, and the like so that the first characteristic in the effect module has the indicated characteristic. The sound effect device according to claim 1 or 2, wherein the amplification factors of the third multiplier are changed at the same time.
<Claim 4>
In the effect module, a third effector is functionally connected between the first effector and the second effector.
The third multiplier is arranged between the first effector and the third effector.
Further comprising a fourth multiplier disposed between the second effector and the third effector.
The control unit increases the amplification factors of the first multiplier and the fourth multiplier in response to the operation of the first operation unit, and increases the amplification factor of the first multiplier. The amplification factor of the third multiplier is decreased by the amount corresponding to the increased amount, and the amplification factor of the second multiplier is reduced by the amount corresponding to the increase of the amplification factor of the fourth multiplier. The acoustic effect device according to claim 3, wherein the sound effect device is controlled so as to decrease.
<Claim 5>
The sound effect device according to claim 4, wherein at least the first effector and the second effector are non-linear conversion type effectors that non-linearly convert a musical tone signal.
<Claim 6>
The sound effect device according to claim 5, wherein the third effector is an effector that is not a non-linear conversion type.
<Claim 7>
The first effector and the second effector are the first kind of effectors.
The third type of effector is a second type of effector different from the first type.
5. The control unit changes a virtual connection position between the first type effector and the second type effector in the effect module in response to the operation of the first operation unit. Or the sound effect device according to claim 6.
<Claim 8>
The plurality of effectors include a non-linear conversion type effector that non-linearly converts a musical tone signal.
The sound effect device according to any one of claims 1 to 6, wherein in the effect module, the non-linear conversion type effector and the non-linear conversion type effector are alternately arranged.
<Claim 9>
Based on the first characteristic of the effect module, the control unit changes the amplification factor of each multiplier to obtain a distortion amount applied to the musical tone signal by the first effector and the second effector. The sound effect device according to claim 5 or 6, which determines the ratio of the amount of distortion applied to the musical tone signal.
<Claim 10>
The sound effect device according to any one of claims 5 to 9, wherein the non-linear conversion type effector is an effector that causes waveform distortion when an input value exceeds a predetermined value.
<Claim 11>
The entire effect module has a second operation unit for setting the value of a parameter that determines the amount of distortion applied to the musical tone signal.
The sound effect device according to claim 9 or 10, wherein the control unit changes the amplification factor of each multiplier in consideration of the operation of the second operation unit.
<Claim 12>
In addition to the built-in effector built into the device, an external effector can be connected.
The sound effect device according to any one of claims 1 to 11, wherein the plurality of effectors include a built-in effector and an external effector.
<Claim 13>
A plurality of table groups in which the amplification factors of the respective multipliers are defined corresponding to the first characteristic in the effect module are prepared.
One table group is selected according to the operation of the first operation unit, and the table group is selected.
The sound effect device according to any one of claims 1 to 12, wherein the control unit collectively and simultaneously changes the amplification factor of each multiplier with reference to the selected table group. ..
<Claim 14>
The sound effect device according to any one of claims 1 to 13.
Sound source data and
Means of performance and
Electronic musical instrument equipped with.

1 Sound effect device 3 External effector (third effector)
4 CPU
5 DSP
9 Electronic keyboard instrument 10 Operation unit 50 Effect module 51 Calculation unit 57 First built-in effector (first effector, distortion 1)
58 Second built-in effector (second effector, distortion 2)
60 Table set 61 Table 101 DRIVE operation unit 102 LEVE operation unit 103 TONE operation unit 104 RATIO operation unit 591 First multiplier 592 Second multiplier 593 Third multiplier 594 Fourth multiplier

Claims (14)

An effect module in which multiple effectors are functionally connected in series,
At least a plurality of multipliers arranged on the input side or the output side of each effector constituting the effect module, and
A first operation unit that instructs a change of the first characteristic in the effect module, and
A control unit that simultaneously and simultaneously changes the amplification factors of the plurality of multipliers so that the first characteristic in the effect module becomes the indicated characteristic in response to the operation of the first operation unit. When,
Sound effect device equipped with. The control unit operates the first operation unit so that the first characteristic of the effect module becomes the indicated characteristic while maintaining the amplification factor of the entire effect module within a predetermined range. The acoustic according to claim 1, wherein the amplification factor of some of the plurality of multipliers is increased and the amplification factor of the other multiplier is decreased accordingly. Effect device. In the effect module, at least the first effector is functionally connected to the input side of the effect module, and the second effector is functionally connected to the output side of the effect module.
The plurality of multipliers include a first multiplier arranged on the input side of the first effector, a second multiplier arranged on the output side of the second effector, and the first effector. Includes a third multiplier located between the second effector and the second effector.
In response to the operation of the first operation unit, the control unit has the first multiplier, the second multiplier, and the like so that the first characteristic in the effect module has the indicated characteristic. The sound effect device according to claim 1 or 2, wherein the amplification factors of the third multiplier are changed at the same time. In the effect module, a third effector is functionally connected between the first effector and the second effector.
The third multiplier is arranged between the first effector and the third effector.
Further comprising a fourth multiplier disposed between the second effector and the third effector.
The control unit increases the amplification factors of the first multiplier and the fourth multiplier in response to the operation of the first operation unit, and increases the amplification factor of the first multiplier. The amplification factor of the third multiplier is decreased by the amount corresponding to the increased amount, and the amplification factor of the second multiplier is reduced by the amount corresponding to the increase of the amplification factor of the fourth multiplier. The acoustic effect device according to claim 3, wherein the sound effect device is controlled so as to decrease. The sound effect device according to claim 4, wherein at least the first effector and the second effector are non-linear conversion type effectors that non-linearly convert a musical tone signal. The sound effect device according to claim 5, wherein the third effector is an effector that is not a non-linear conversion type. The first effector and the second effector are the first kind of effectors.
The third type of effector is a second type of effector different from the first type.
5. The control unit changes a virtual connection position between the first type effector and the second type effector in the effect module in response to the operation of the first operation unit. Alternatively, the sound effect device according to claim 6. The plurality of effectors include a non-linear conversion type effector that non-linearly converts a musical tone signal.
The sound effect device according to any one of claims 1 to 6, wherein in the effect module, the non-linear conversion type effector and the non-linear conversion type effector are alternately arranged. Based on the first characteristic of the effect module, the control unit changes the amplification factor of each multiplier to obtain a distortion amount applied to the musical tone signal by the first effector and the second effector. The sound effect device according to claim 5 or 6, which determines the ratio of the amount of distortion applied to the musical tone signal. The sound effect device according to any one of claims 5 to 9, wherein the non-linear conversion type effector is an effector that causes waveform distortion when an input value exceeds a predetermined value. The entire effect module has a second operation unit for setting the value of a parameter that determines the amount of distortion applied to the musical tone signal.
The sound effect device according to claim 9 or 10, wherein the control unit changes the amplification factor of each multiplier in consideration of the operation of the second operation unit. In addition to the built-in effector built into the device, an external effector can be connected.
The sound effect device according to any one of claims 1 to 11, wherein the plurality of effectors include a built-in effector and an external effector. A plurality of table groups in which the amplification factors of the respective multipliers are defined corresponding to the first characteristic in the effect module are prepared.
One table group is selected according to the operation of the first operation unit, and the table group is selected.
The sound effect device according to any one of claims 1 to 12, wherein the control unit collectively and simultaneously changes the amplification factor of each multiplier with reference to the selected table group. .. The sound effect device according to any one of claims 1 to 13.
Sound source data and
Means of performance and
Electronic musical instrument equipped with.

Images