JP2016173389A - Effector, method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of changing an effect imparted to a tone signal without being affected by intensity of a fundamental tone.SOLUTION: An effector has a constitution including: break point acquisition means for acquiring a break point of music in a tone signal; sound effect signal generation means, which outputs a sound effect signal imparting an effect onto the tone signal, for generating the sound effect signal at an arbitrary pont of time with reference to an output sound in the past from the point of time; and sound effect nullification means for nullifying reference of the output sound in the past on the break point.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an effector, a method, and a program.

  2. Description of the Related Art Conventionally, effectors that output various effects on sound signals are known. For example, Patent Document 1 discloses a technique for changing a filter cutoff frequency, a Q value of a state variable filter, and an output volume level in accordance with an attack level of a musical sound signal. With this configuration, in Patent Document 1, an effect similar to a spring reverb can be imparted to sound.

JP 2004-53635 A

In the prior art, the effect obtained by the effector is uniform. In the technique disclosed in Patent Document 1, the cutoff frequency, the Q value of the state variable filter, and the output volume level are changed in accordance with the attack level of the tone signal. Therefore, in the prior art, the effect cannot be changed in music with a small attack (for example, a long tone by violin).
The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of changing the effect given to the output sound without being affected by the strength of the original sound.

  In order to achieve the above-described object, the effector includes an acoustic effect signal generation unit that generates an acoustic effect signal by referring to the past output sound, and invalidates the reference of the past output sound at the break of music. In other words, the sound indicated by the sound effect signal has an effect based on the past output sound, but the influence is cut off when reaching the break of music. Therefore, the effect given to the output sound at the break of music greatly changes. As a result, it is possible to change the effect given to the output sound without being affected by the strength of the original sound.

(1A) is a block diagram of an effector according to an embodiment of the present invention, and (1B) is a timing chart showing changes in time-series signals. (2A) is a block diagram of an effector according to an embodiment of the present invention, and (2B) is a timing chart showing changes in time-series signals. (3A) is a block diagram illustrating a configuration example of a GATE signal generation unit, and (3B) is a timing chart illustrating changes in time-series signals. (4A) is a block diagram of an effector according to an embodiment of the present invention, and (4B) is a timing chart showing changes in time-series signals. It is a block diagram of an effector concerning one embodiment of the present invention. It is a timing chart which shows the change of a time series signal. (7A) is a block diagram illustrating a configuration example of a GATE signal generation unit, and (7B) is a block diagram illustrating a configuration example that allows a user to specify parameters.

Here, embodiments of the present invention will be described in the following order.
(1) Effector configuration:
(2) Example of operation:
(3) Second embodiment:
(3-1) Operation example:
(3-2) Configuration example of GATE signal generation unit:
(4) Third embodiment:
(4-1) Operation example:
(5) Fourth embodiment:
(5-1) Example of operation:
(6) Other embodiments:

(1) Effector configuration:
FIG. 1A is a block diagram showing a configuration of an effector 10 according to an embodiment of the present invention. The effector 10 may be configured by hardware or software. Here, an example in which the effector 10 is configured by a DSP (Digital Signal Processor) will be described.

  A sound signal is input to the effector 10 from another device. The effector gives a sound effect to the sound indicated by the sound signal and outputs it as a sound effect signal.

  In the present embodiment, the sound signal is a digital signal indicating a sound wave. Various devices can be assumed as the signal source of such a signal. For example, a tone generator that generates and outputs a sound signal based on a MIDI signal, a device that performs analog-digital conversion on a sound wave detected by a microphone, and the like can be used as a signal source.

  The sound effect signal is a digital signal indicating a sound wave of a sound to which the sound effect is given. Various configurations can be adopted as the configuration for outputting the sound. For example, a configuration using a device that converts an acoustic effect signal into an analog signal, a sound system that amplifies the analog signal, and a speaker that outputs sound by the amplified signal can be used.

  In the present embodiment, the effector 10 includes a break acquisition unit 20, an acoustic effect signal generation unit 21, an acoustic effect invalidation unit 22, and an amplifier 23. The break acquisition unit 20 acquires a music break in the sound signal. The break is a timing that can be set on the time axis so that music (contents of music, etc.) can be distinguished before and after the break. In the present embodiment, the break is a bar line timing. That is, in this embodiment, the sound indicated by the sound signal is a music composed of the sound indicated by the note (or rest) for each measure. Therefore, in the present embodiment, the break acquisition unit 20 acquires the timing at which measures are switched (start timing of the first beat of each measure) as a break.

  In the present embodiment, the break acquisition unit 20 acquires a music break based on a clock signal (a signal for controlling the output timing of the sound signal) output by a device external to the effector 10. Specifically, the delimiter acquisition unit 20 includes a counter that measures the number of clock signals, and outputs a signal indicating the count number. In the present embodiment, clock signals are output at a predetermined cycle, and the number of clock signals corresponding to a time length of one measure is determined in advance. Therefore, in the configuration in which the sound signal and the clock signal are provided to the effector 10 and the output timing of the sound signal is controlled by the clock signal, the delimiter acquisition unit 20 performs the clock signal after the sound output start timing by the sound signal. It is possible to obtain a break by measuring the number of.

  For example, when the number of clock signals is 960 and corresponds to one measure, the delimiter acquisition unit 20 measures 1 to 960 clock signals, clears the measurement when 960 are measured, and measures again from the first. Do. With this configuration, when 960 pieces are measured, one measure is completed, and it is acquired that the next one is the start timing of the next one measure. Therefore, in order to complete a process that requires a period of 10 clock signals in accordance with a break, the process should be started at the timing of the 950th clock signal, and the count number in the break acquisition unit 20 is as described above. It can be used to perform processing according to the separator. Therefore, it can be said that the signal indicating the number of counts output from the break acquisition unit 20 indicates a break. In FIG. 1B, a signal output from the delimiter acquisition unit 20 is schematically shown. That is, in the timing chart indicated as the count number, it is shown that the count number increases from 0 to the maximum value, then the count number becomes 0 again, and the count number further increases.

  The sound effect signal generation unit 21 outputs a sound effect signal that gives an effect to the sound signal. In addition, when generating the sound effect signal, the sound effect signal generation unit 21 generates a sound effect signal at an arbitrary time point with reference to output sounds past from the time point. That is, the sound effect signal generation unit 21 sequentially inputs time-series sound signals, records sound signals over a sample period, and sequentially deletes them in a FIFO (First In First Out) format, and the memory (not shown). A processing unit (not shown) that performs predetermined processing based on the recorded sound signal. The predetermined process is a process of giving a predetermined acoustic effect to the sound indicated by the sound signal based on the sound signal recorded in the memory.

  As described above, the sound effect signal generation unit 21 in the present embodiment sequentially inputs time-series sound signals to the memory, and generates sound effect signals to which sound effects are given based on the sound signals recorded in the memory. When attention is paid to the sound signal recorded in the memory at a certain time, a sound signal indicating the sound before the sound at the certain time is recorded. Therefore, when generating the sound effect signal, the sound effect signal generation unit 21 generates a sound effect signal at an arbitrary time with reference to output sounds past from the time.

  In the present embodiment, the sound effect signal generation unit 21 can collectively erase the sound signals recorded in the memory. That is, when the sound effect invalidation unit 22 outputs a memory control signal (described later), the sound effect signal generation unit 21 starts erasing the memory according to the memory control signal. As a result, the sound signal recorded in the memory over a slight predetermined period is deleted, and the reference of the past output sound is invalidated. The acoustic effect may be any effect, and examples thereof include any type of effect such as reverb, delay, chorus, flanger, phaser, tremolo, wah, compressor, distortion, and the like. In addition, in an arbitrary acoustic effect, parameters indicating the intensity of the effect, the degree of sound modulation, and the like may be variable. Furthermore, the type of effect and its parameters may be selectable by the user.

  When the sound effect signal generation unit 21 generates a sound effect signal, the sound effect signal is input to the amplifier 23. The amplifier 23 can adjust the gain between 0% and 100%. When the gain is adjusted, the acoustic effect signal after gain adjustment is output to the outside of the effector 10. In the present embodiment, the gain in the amplifier 23 is adjusted by a signal input from the outside. That is, in the amplifier 23, the gain is adjusted by the signal output from the acoustic effect invalidating unit 22.

  The acoustic effect invalidation unit 22 invalidates the reference of the past output sound at the music break in the sound signal. Specifically, the sound effect signal generation unit 21 generates and outputs an invalidation signal for invalidating the sound effect in accordance with a music break based on the signal output from the break obtaining unit 20. In this embodiment, the invalidation signal is composed of a gain control signal and a memory control signal.

  The gain control signal is a signal for controlling the gain in the amplifier 23. In the present embodiment, the acoustic effect invalidation unit 22 is based on the output signal of the break acquisition unit 20, and is from the start timing to the end timing of the measure. After the gain increases gradually from 0% and maintains 100%, a signal is generated that gradually decreases to 0%. Specifically, the gain control signal is a signal as shown in FIG. 1B. Such a gain control signal, for example, increases the gain from 0% to 100% while the output signal of the break acquisition unit 20 changes from 0 count to 10 count, and the output signal of the break acquisition unit 20 starts from 11 count. The gain is maintained at 100% while changing to 940 counts, and the gain is decreased from 100% to 0% while the output signal of the break acquisition unit 20 is changed from 941 counts to 950 counts, and the output signal of the break acquisition unit 20 This is realized by generating a signal by the acoustic effect invalidating unit 22 so that the gain is maintained at 0% while the value changes from 951 counts to 960 counts.

  The memory control signal is a signal for collectively erasing sound signals recorded in the memory included in the sound effect signal generation unit 21. In this embodiment, the sound effect invalidation unit 22 outputs the output signal of the delimiter acquisition unit 20. Based on this, a memory control signal is generated so that erasure of information recorded in the memory at the end is completed. Specifically, the memory control signal is a signal as shown in FIG. 1B. Such a memory control signal increases, for example, from 0 to the maximum value (“1” shown in FIG. 1B) during the period in which the output signal of the break acquisition unit 20 changes from 950 counts to 960 counts, and immediately becomes 0. The sound effect invalidating unit 22 is realized by generating a pulse signal so as to change. Since the memory control signal is a signal on a pulse, the reference of the past output sound is validated after the batch erase of the memory is completed.

(2) Example of operation:
Next, an operation example of the effector 10 will be described based on FIG. 1B. FIG. 1B is a diagram schematically illustrating a time-series count number (output signal of the delimiter acquisition unit 20), a gain control signal, and a memory control signal (an invalidation signal output from the acoustic effect invalidation unit 22). The delimiter acquisition unit 20 counts the number based on the clock signal and outputs it as a signal indicating the count number. When the count reaches the maximum value indicating the last timing of the measure, it is cleared and becomes 0. Therefore, as shown in FIG. 1B, the times T ₁ , T ₂ , T ₃ , and T _{4 at} which the count number becomes 0 are separated ( Measure start timing).

  On the other hand, the sound effect signal generation unit 21 sequentially acquires time-series sound signals in synchronization with the clock signal, and sequentially records the acquired sound signals in the memory. In a state where the sound signal is recorded in the memory, the sound effect signal generation unit 21 generates and outputs a sound effect signal indicating a sound to which the sound effect is given based on the sound signal recorded in the memory. Therefore, if the memory is not cleared, the sound effect signal generation unit 21 sequentially outputs sound effect signals to which the sound effect is given.

The sound effect signal output from the sound effect signal generation unit 21 is subjected to gain adjustment by the amplifier 23 and sequentially output from the effector 10. In the amplifier 23, since the gain is adjusted by the gain control signal shown in FIG. 1B, the initial stage of the measure (for example, the period after time T ₁ , T ₂ , T ₃ , T ₄ and 10 clock signals). , The output level of the sound effect signal output from the effector 10 gradually increases. Thereafter, the output level of the sound effect signal is maintained at the maximum value, and is output from the effector 10 at the end of the bar (for example, a period of 20 clock signals before the times T ₁ , T ₂ , T ₃ , T ₄ ). The output level of the sound effect signal gradually decreases.

  In the present embodiment, the memory control signal is output to the sound effect signal generation unit 21 after the output level of the sound effect signal becomes 0%. Therefore, the sound effect signal generation unit 21 erases the memory after the output level of the sound effect signal becomes 0%, and invalidates the reference of the past output sound. That is, since the acoustic effect signal generation unit 21 generates an acoustic effect signal with reference to the past output sound, when the reference of the past output sound is invalidated, the previous effect is canceled. Therefore, in this embodiment, the reference of the past output sound is invalidated at the break, and the effect given to the output sound before the break is lost. As a result, the effect can be greatly changed in the separation. For example, even if an acoustic effect such as reverb is given to the sound signal before invalidation, the effect is canceled. Therefore, when the output level of the sound effect signal rises again after the start timing of the measure, the sound indicated by the sound effect signal is not affected by the past sound effect.

  For this reason, in this embodiment, every time a music is separated, the past acoustic effect is canceled and a new acoustic effect is given. Therefore, the effect given to the output sound at the break of music greatly changes. As a result, even if the intensity of the original sound is poor, such as an attack, it is possible to change the effect given to the output sound at the break timing without being affected by the intensity of the original sound. In the present embodiment, as shown in FIG. 1B, the gain of the amplifier 23 is adjusted to 0% at the timing when the memory is erased. Therefore, even if the memory effect is erased and the sound effect is canceled, there is no impression that the sound effect is suddenly cut off. Further, in the present embodiment, since the sound signal recorded in the memory is deleted at the break, the past sound signal reference can be invalidated by a simple process.

(3) Second embodiment:
The sound indicated by the sound effect signal may be a sound in which an arbitrary effect is given to the sound signal, or a sound in which an arbitrary effect is given and another sound (for example, a sound indicated by the sound signal) are mixed. It may be a sound that has been played. That is, the sound indicated by the sound effect signal may be a so-called wet sound or a sound in which a wet sound and a dry sound are mixed. FIG. 2A is a block diagram illustrating a configuration example of the effector 100 that outputs an acoustic effect signal indicating a sound obtained by mixing a wet sound and a dry sound. Here, although a delay is assumed as the acoustic effect, it is needless to say that another acoustic effect may be provided.

  In the embodiment shown in FIG. 2A, the effector 100 includes a delimiter acquisition unit 200, an acoustic effect signal generation unit 210, and an acoustic effect invalidation unit 220. The break acquisition unit 200 and the sound effect invalidation unit 220 can be realized by substantially the same configuration as the break acquisition unit 20 and the sound effect invalidation unit 22 shown in FIG. However, in the acoustic effect invalidation unit 220 illustrated in FIG. 2A, the output invalidation signal does not include the gain control signal, and outputs only the signal corresponding to the memory control signal. Therefore, in the present embodiment, the signal is referred to as an invalidation signal. FIG. 2B schematically shows the invalidation signal. As shown in FIG. 2B, in the present embodiment, the invalidation signal is formed by a pulse signal in which a falling edge exists at the start timing of a measure and a rising edge immediately before that.

  The acoustic effect signal generation unit 210 includes a GATE signal generation unit 210a, a gate unit 210b, mixers 210c and 210i, a delay signal generation unit 210d, amplifiers 210e, 210g, and 210h, and an LPF (low-pass filter) 210f. The mixers 210c and 210i are circuits that generate mixed signals for simultaneously generating sounds represented by a plurality of types of signals. That is, the mixer 210c generates and outputs a mixed signal obtained by mixing the output signal of the gate unit 210b and the output signal of the amplifier 210g. The mixer 210i generates a mixed signal obtained by mixing the output signals of the amplifiers 210e and 210h, and outputs the mixed signal as an acoustic effect signal to the outside of the effector 100.

  The LPF 210f attenuates and outputs the high frequency component of the input signal in order to simulate the attenuation of the high frequency component of the sound when the sound is reflected in the actual acoustic space. The amplifier 210g adjusts the gain of the output signal of the LPF 210f and outputs it. That is, in the present embodiment, the high frequency component of the output signal of the delay signal generation unit 210d is attenuated, the gain is adjusted, and a feedback loop is formed that is input again to the delay signal generation unit 210d via the mixer 210c. ing.

  The amplifier 210h adjusts the gain of the sound signal and outputs it. The amplifier 210e adjusts the gain of the output signal of the delay signal generation unit 210d and outputs the adjusted signal. Therefore, in this embodiment, the dry sound output from the amplifier 210h and the wet sound output from the amplifier 210e are mixed by the mixer 210i and output as an acoustic effect signal.

  The delay signal generation unit 210d gives a delay effect to the output signal of the mixer 210c and outputs it. In the present embodiment, the delay amount is set to a period of one beat. That is, the delay signal generation unit 210d sequentially inputs the output signal of the time-series mixer 210c, records the output signal over the sample period, and sequentially deletes it in the FIFO (First In First Out) format. And a processing unit (not shown) that performs delay processing based on the signal recorded in the memory. Then, the delay signal generation unit 210d outputs the information when a period of one beat has elapsed after arbitrary information included in the sound signal is recorded in the memory. As a result, a delayed signal to which a delay effect for one beat is given is output. In the present embodiment as well, when an invalidation signal is input to the delay signal generation unit 210d, the sound signals recorded in the memory are collectively erased.

  The GATE signal generation unit 210a and the gate unit 210b extract a part of the time-series sound signal as a processing target sound signal and supply the extracted signal to the delay signal generation unit 210d. The gate unit 210b has a function of outputting one of two types of signals input to two input units (indicated as 1, 0 in FIG. 2A, hereinafter referred to as input unit 1 and input unit 0). The output target is controlled by the GATE signal. That is, when the GATE signal is at a high level, the gate unit 210b outputs a signal input to the input unit 1, and when the GATE signal is at a low level, the gate unit 210b outputs a signal input to the input unit 0. To do.

  In the present embodiment, as shown in FIG. 2A, a sound signal is input to the input unit 1, and the input unit 0 is maintained at 0 level. Therefore, in this embodiment, when the GATE signal is at a high level, a sound signal is output from the gate unit 210b, and when the GATE signal is at a low level, no signal is output from the gate unit 210b (the level is 0 level). ). For this reason, the GATE signal generation unit 210a and the gate unit 210b extract a sound signal during a period in which the GATE signal is at a high level and supply the sound signal to the delay signal generation unit 210d.

  Note that the GATE signal generation unit 210a only needs to be able to generate a GATE signal indicating a period during which a signal supplied to the delay signal generation unit 210d is extracted from the sound signal, and various configurations can be employed. In the present embodiment, the GATE signal generation unit 210a includes a clock signal (CLK) for controlling the output timing of the sound signal, a reset signal (RESET) indicating a break between bars, and a GATETIME signal indicating the time length of the GATE signal. Is used as an input to generate a GATE signal. An example of the configuration will be described later. In addition, in the figure attached to this specification, when the straight line is attached | subjected on the character (for example, CLK) which shows a signal, it means the inverted signal.

(3-1) Operation example:
Next, an operation example of the effector 100 will be described based on FIG. 2B. In FIG. 2B, the GATE signal output from the GATE signal generation unit 210a, the invalidation signal output from the acoustic effect invalidation unit 220, the sound signal input to the effector 100, the processing target sound signal output from the gate unit 210b, The example of the timing chart of the delay signal which the delay signal generation part 210d outputs is shown.

  In the example shown in FIG. 2B, the sound indicated by the sound signal is an example in which one measure is a music of 4 beats, and the timing of the measure line (supplied with n or n + 1) or beat is shown above the timing chart. The timing is shown. In the example shown in FIG. 2B, the GATE signal is at a high level for a period length of one beat from the bar line timing (same as the delay amount by the delay signal generation unit 210d).

  Therefore, the sound signal input to the gate unit 210b within the period of one beat from the bar line timing is output from the gate unit 210b, and the sound signal input to the gate unit 210b during the other period is the gate unit. It is not output from 210b. For this reason, as shown in FIG. 2B, a sound signal within a period of one beat from the bar line timing is extracted as a processing target sound signal and output from the gate unit 210b.

  On the other hand, the invalidation signal in the example shown in FIG. 2B is a pulse signal in which a falling edge exists at the start timing of a measure and a rising edge immediately before that. Therefore, when the invalidation signal output from the acoustic effect invalidation unit 220 is input to the delay signal generation unit 210d, the memory is erased at the end of the measure. Therefore, in the example shown in FIG. 2B, the delay signal generation unit 210d performs a delay with reference to the recorded contents of the memory during the period from the start timing of the bar line to the end of the bar.

  On the other hand, when the memory is erased at the end of the measure, the reference to the signal recorded in the memory in the past (the output signal of the mixer 210c) is invalidated. Therefore, even if the output signal of the mixer 210c starts to be sequentially input to the delay signal generation unit 210d in the next bar line, the signal is not output from the delay signal generation unit 210d for the first one beat that is the delay amount.

  That is, in the example shown in FIG. 2B, no signal is input to the mixer 210c from the feedback line formed by the LPF 210f and the amplifier 210g in the period of one beat from the bar line timing. On the other hand, in the period of one beat from the bar line timing, a sound signal is input from the gate part 210b to the mixer 210c. Therefore, in the period of one beat from the bar line timing, only the sound signal is input to the mixer 210c, and only the sound signal is supplied to the delay signal generation unit 210d. Therefore, in the example shown in FIG. 2B, the sound signal in the period indicated by the GATE signal is extracted as the processing target sound signal and supplied to the delay signal generation unit 210d.

  When the processing target sound signal is input to the delay signal generation unit 210d, the delay signal generation unit 210d outputs a delay for a period of one beat, which is a delay amount. Therefore, in the period from the start timing of the second beat of the delay signal shown in FIG. 2B to the timing immediately before the third beat, the signal output from the delay signal generation unit 210d is the second beat from the start timing of the first beat. It is the same signal as the sound signal up to the timing immediately before.

  In the period from the start timing of the second beat to the timing immediately before the third beat, when a delay signal is output from the delay signal generation unit 210d, the delay signal is input to the amplifier 210e, but via the feedback line. And input to the mixer 210c. In the example shown in FIG. 2B, since the processing target sound signal is not input to the mixer 210c after the second beat (until the next bar line timing), the signal output from the mixer 210c after the second beat is Only the signal input from the feedback line.

  When a delay signal is input to the delay signal generation unit 210d from the start timing of the second beat to the timing immediately before the third beat, the delay signal generation unit 210d is also given a delay for a period of one beat. Is output from. Therefore, in the example shown in FIG. 2B, the signal from the start timing of the second beat to the timing immediately before the third beat, the signal from the start timing of the third beat to the timing immediately before the fourth beat, and the fourth beat The signal from the start timing to the timing immediately before the next bar line is similar (the high-frequency component content and gain are different: in FIG. 2B, the influence of the high-frequency component content and gain is ignored. Signal).

  As described above, since the delay signal shown in FIG. 2B is output from the delay signal generation unit 210d and input to the amplifier 210e, the amplifier 210e has a timing immediately before the bar line from the start timing of the second beat. A signal indicating a wet sound that can be generated during the period until is output. On the other hand, since a sound signal is input to the amplifier 210h, the amplifier 210h outputs a signal indicating dry sound. And these wet sound and dry sound are mixed by the mixer 210i, and are output as an acoustic effect signal.

  That is, in the example shown in FIG. 2B, a signal obtained by mixing a signal having a predetermined gain applied to a sound signal and a signal having a predetermined gain applied to a delayed signal is an acoustic effect signal. In the above configuration, since the reference to the past sound is invalidated at the bar line that is the music break, the sound indicated by the sound effect signal has the effect given to the output sound at the music break. It changes a lot. For example, the delay signals are greatly different before and after the bar line n + 1 shown in FIG. 2B. The gains in the amplifiers 210e, 210g, and 210h can be set based on various factors. For example, the gain may be a gain fixed in advance, or may be adjustable by a user through an interface (not shown).

(3-2) Configuration example of GATE signal generation unit:
3A is a block diagram illustrating a configuration example of the GATE signal generation unit 210a, and FIG. 3B is a timing chart illustrating signals input to the GATE signal generation unit 210a and output signals of components of the GATE signal generation unit 210a. is there. In this example, the clock signal (CLK) is a signal that toggles in a predetermined cycle (the cycle of the length of a 32nd note in FIG. 3B), and a rising edge of a certain clock signal is regarded as a bar line timing. Therefore, the inverted signal of the clock signal is a signal having a falling edge at the bar line timing or beat timing as shown in FIG. 3B.

  The reset signal (RESET) is a pulse signal having a rising edge at the bar line timing, and its inverted signal is a signal having a falling edge at the bar line timing. The GATETIME signal is a signal indicating the time length of the GATE signal (not shown), and is, for example, a signal indicating the length of the GATE signal by the number of clock signals. In FIG. 3B, an example in which the GATETIME signal indicates the length of one beat (indicating that the number of clocks is eight) is assumed.

  3A, the GATE signal generation unit 210a includes a counter 210a1, a comparator 210a2, a latch 210a3, and an inverter 210a4. The counter 210a1 has a function of measuring the number of falling edges. In the counter 210a1, the measurement value is cleared by an inverted signal of the reset signal or a pulse signal output from the comparator.

  The comparator 210a2 compares the output signal (a signal indicating the number of falling edges) of the counter 210a1 with the GATETIME signal. When the output signal of the counter 210a1 matches the GATETIME signal, the comparator 210a2 outputs a pulse signal to the counter 210a1 and the latch 210a3.

  The latch 210a3 operates in synchronization with the falling edge in the inverted signal of the clock signal. Further, when an inverted signal of the reset signal is input, the latch 210a3 is reset and the output level becomes a low level. Further, when the pulse signal output from the comparator 210a2 is input to the latch 210a3, the output level becomes a high level, and this state is maintained until the inverted signal of the reset signal is input again.

  According to the above configuration, the latch 210a3 changes from a high level to a low level in synchronization with the inverted signal of the reset signal, and changes from a low level to a high level in synchronization with the pulse signal output from the comparator 210a2. Is output. Therefore, as indicated by the latch output in FIG. 3B, the latch 210a3 outputs a signal whose output level is low for a period of one beat from the bar line start timing. For this reason, when the signal is output via the inverter 210a4, a GATE signal whose output level is high for only one beat period from the start timing of the bar line is output as shown in FIG. 2B. The

(4) Third embodiment:
When invalidating the reference of the past output sound, the memory may be erased as described above, or by stopping the input of the sound signal to the memory over the sampling period before the music separation, You may invalidate the reference of the past output sound. FIG. 4A is a block diagram illustrating a configuration example of the effector 101 having a configuration in which the reference of the past output sound is invalidated by stopping the input of the sound signal to the memory. Here, although a delay is assumed as the acoustic effect, it is needless to say that another acoustic effect may be provided.

  In the embodiment illustrated in FIG. 4A, the effector 101 includes a delimiter acquisition unit 201, an acoustic effect signal generation unit 211, and an acoustic effect invalidation unit 221. The break acquisition unit 201 and the sound effect invalidation unit 221 can be realized by substantially the same configuration as the break acquisition unit 20 and the sound effect invalidation unit 22 illustrated in FIG. 2A. However, in the acoustic effect invalidation unit 221 illustrated in FIG. 4A, the invalidation signal is generated so that the period during which the invalidation signal is at the high level matches the delay amount in the delay signal generation unit 211d.

  The acoustic effect signal generation unit 211 includes a GATE signal generation unit 211a, gate units 211b and 211j, mixers 211c and 211i, a delay signal generation unit 211d, amplifiers 211e, 211g, and 211h, and an LPF (low pass filter) 211f. .

  In this configuration, the configuration of the GATE signal generation unit 211a, the gate unit 211b, the mixers 211c and 211i, the delay signal generation unit 211d, the amplifiers 211e, 211g, and 211h and the LPF 211f includes the GATE signal generation unit 210a and the gate unit illustrated in FIG. The configuration is the same as 210b, mixers 210c and 210i, delay signal generator 210d, amplifiers 210e, 210g, and 210h, and LPF 210f.

  However, the delay amount in the delay signal generator 211d is different from the example shown in FIG. 2A, and is set to a period of 1/2 beat. Further, the delay signal generation unit 211d does not have to have a function of erasing the memory all at once according to an external control signal. However, the memory is constituted by a shift register that sequentially transmits the recording contents to the preceding recording element in synchronization with the clock signal. Therefore, the delay signal generation unit 211d transmits information to the previous recording element in synchronization with the clock signal regardless of the content of the information recorded in the memory, and the delay signal generation unit 211d extends over a period corresponding to the delay amount. If no signal is input to the memory (information 0 is input), the memory is cleared (stored information is all 0).

  Further, the gate portion 211j has the same configuration as the gate portion 211b. However, the invalidation signal output from the acoustic effect invalidation unit 220 is input to the gate unit 211j. Further, the input unit 1 is maintained at 0 level, and the output signal of the mixer 211c is input to the input unit 0. The output signal of the gate unit 211j is input to the delay signal generation unit 211d. Therefore, when the invalidation signal is at a high level, no signal is output from the gate unit 211j, and when the invalidation signal is at a low level, the output signal of the mixer 211c is output from the gate unit 211j.

(4-1) Operation example:
Next, an operation example of the effector 101 will be described based on FIG. 4B. 4B, the GATE signal output from the GATE signal generation unit 211a, the invalidation signal output from the acoustic effect invalidation unit 221, the sound signal input to the effector 101, the processing target sound signal output from the gate unit 211b, The example of the timing chart of the delay signal which the delay signal generation part 211d outputs is shown.

  Also, in the example shown in FIG. 4B, the sound indicated by the sound signal is an example in which one measure is a music of 4 beats, and the timing of the measure line (supplied with n or n + 1) or beat is shown above the timing chart. The timing is shown. Also in the example shown in FIG. 4B, the GATE signal is at a high level for a period of one beat from the bar line timing (twice the amount of delay by the delay signal generator 211d).

  Therefore, the sound signal input to the gate unit 211b within the period of one beat from the bar line timing is output from the gate unit 211b, and the sound signal input to the gate unit 211b during the other period is the gate unit. 211b is not output. Therefore, as shown in FIG. 4B, a sound signal within a period of one beat from the bar line timing is extracted as a processing target sound signal and output from the gate unit 211b. The processing target sound signal output from the gate unit 211b is input to the gate unit 211j via the mixer 211c.

  On the other hand, in the example shown in FIG. 4B, the invalidation signal is a pulse signal for the last 1/2 beat of the measure. Therefore, due to the invalidation signal input from the acoustic effect invalidation unit 221 to the gate unit 211j, the signal is not output from the gate unit 211j during the last half beat period of the measure. On the other hand, in the period immediately before the start timing of the (4 + 1/2) th beat from the start timing of the bar line, the output signal of the mixer 211c is output from the gate section 211j. In the present embodiment, since the processing target sound signal is a sound signal within a period of one beat from the bar line timing, the sound signal is input to the delay signal generation unit 211d via the gate unit 211j. Will be.

  When the processing target sound signal starts to be input to the delay signal generation unit 211d, a delay signal is output from the delay signal generation unit 211d after a delay of 1/2 beat is given to the processing target sound signal. . For example, in the first beat of the n-th bar, the processing target sound signal exists for the first half of the beat, and therefore, when the processing target sound signal is input, only 1/2 beat from the timing of the bar line. After the delay, a delay signal starts to be output. In the first beat of the (n + 1) th measure, the processing target sound signal does not exist for the first half of the beat and the processing target sound signal exists for the second half of the second half. When input, a delay signal starts to be output from the second beat.

  In any case, when the delay signal starts to be output, the delay signal is input to the mixer 211c through the feedback line constituted by the LPF 211f and the amplifier 211g. As a result, any one of the processing target sound signal, the delay signal, and the mixed signal of the processing target sound signal and the delay signal is output from the mixer 211c. In the present embodiment, unlike the configuration shown in FIG. 2A, the sound signal to be processed and the delay signal can be input simultaneously in the mixer 211c. Thus, more complicated effects can be obtained.

  As described above, when a period of ½ minutes which is a delay period elapses from the start timing of the bar line, the delay signal generation unit 211d sequentially outputs the delay signal. In this state, when the period of the last half of the bar is reached, an invalidation signal is output from the acoustic effect invalidation unit 221.

  When an invalidation signal is output from the acoustic effect invalidation unit 221, the invalidation signal is input to the gate unit 211j, and no signal is output from the gate unit 211j. Therefore, no new signal is supplied to the delay signal generation unit 211d during the period corresponding to 1/2 beat. On the other hand, in the memory of the delay signal generation unit 211d, information is transmitted to the previous recording element in synchronization with the clock signal regardless of the content of the input information. Therefore, when no signal is input to the delay signal generation unit 211d for a period of ½ beat, which is the same period as the delay period in the delay signal generation unit 211d, the recorded content of the memory is cleared. In this case, even if the reference of the past signal is invalidated and a signal that is not at the 0 level in the next bar line starts to be sequentially input to the delay signal generation unit 211d, the first 1/2 beat that is the delay amount is used. No signal is output from the delayed signal generator 211d.

  As a result, since the delay signal generator 211d outputs the delay signal shown in FIG. 4B and inputs it to the amplifier 211e, the amplifier 211e has a period of 1/2 beat from the start timing of the bar line. A signal indicating a wet sound that can be generated during the period from the timing to the timing immediately before the bar line is output. On the other hand, since a sound signal is input to the amplifier 211h, the amplifier 211h outputs a signal indicating dry sound. And these wet sound and dry sound are mixed by the mixer 211i, and are output as an acoustic effect signal.

  That is, in the example shown in FIG. 4B, a signal obtained by mixing a signal having a predetermined gain applied to a sound signal and a signal having a predetermined gain applied to a delayed signal is an acoustic effect signal. In the above configuration, the reference to the past sound is invalidated in synchronization with the bar line that is the music break, so that the effect given to the output sound at the music break greatly changes. For example, the delay signals are greatly different before and after the bar line n + 1 shown in FIG. 4B.

(5) Fourth embodiment:
When invalidating the reference of the past output sound in accordance with the break of music, the type and parameter of the sound effect may be changed. FIG. 5 is a block diagram illustrating a configuration example of the effector 102 having a configuration for changing the type and parameters of the sound effect in accordance with the break of music. Here, two types of delays having different delay amounts are assumed as acoustic effects, but it is of course possible to adopt a configuration in which other acoustic effects are given.

  In the embodiment shown in FIG. 5, the effector 102 includes a delimiter acquisition unit 202, an acoustic effect signal generation unit 212, and an acoustic effect invalidation unit 222. The break acquisition unit 202 acquires a reset signal (RESET) indicating a music break and passes it to the acoustic effect signal generation unit 212 and the acoustic effect invalidation unit 222. In this embodiment, the reset signal is a pulse signal having a rising edge at the bar line timing.

  The sound effect invalidating unit 222 is configured by a D latch, and changes the state in synchronization with the reset signal output from the delimiter acquisition unit 202. That is, the output signal is alternately switched between the high level and the low level in synchronization with the reset signal output by the delimiter acquisition unit 202. Accordingly, in the present embodiment, a signal that switches between a high level and a low level in synchronization with the reset signal is an invalidation signal. The invalidation signal output from the acoustic effect invalidation unit 222 is supplied to the gate units 212b3, 212j1, and 212j3 described later. Further, the inverted signal of the output signal of the acoustic effect invalidating unit 222 is supplied to the gate unit 212j2 described later.

  The sound effect signal generation unit 212 includes a GATE signal generation unit 212a, gate units 212b1, 212b2, 212b3, 212j1, 212j2, 212j3, mixers 212c1, 212c2, 212i, delay signal generation units 212d1, 212d2, amplifiers 212e, 212g1, and 212g2. , 212h, LPF (low-pass filter) 212f1, 212f2, and inverter 212k. Each of these components has the same function as the function although the input signal and the output signal may be different from the embodiment shown in FIG. 4A. However, the delay amount in the delay signal generation unit 212d1 is one beat, and the delay amount in the delay signal generation unit 212d2 is ½ beat.

  Furthermore, the GATE signal generation unit 212a shown in FIG. 5 can output two types of GATE signals (GATE signals A and B). Such a GATE signal generation unit 212a can be realized by a configuration including two systems similar to the GATE signal generation units 210a and 211a. FIG. 7A is a diagram illustrating a configuration example of the GATE signal generation unit 212a, and includes a GATE signal A generation unit 212a1 and a GATE signal B generation unit 212a2 that are the same components as the GATE signal generation units 210a and 211a. Accordingly, if the inverted signal of the clock signal and the inverted signal of the reset signal are input to the GATE signal A generation unit 212a1 and the GATE signal B generation unit 212a2, respectively, and different GATETIME signals (GATETIME A, GATETIME B) are input, the high level is obtained. Two GATE signals (GATE signal A and GATE signal B) having different levels can be generated.

  In the present embodiment, the processing target sound signals supplied to the delayed signal generation units 212d1 and 212d2 are selected by the gate units 212b1, 212b2, and 212b3. That is, a sound signal is input to the input unit 1 of the gate units 212b1 and 212b2, and the input unit 0 is maintained at 0 level. A GATE signal A is input to the gate portion 212b1, and a GATE signal B is input to the gate portion 212b1. Accordingly, the gate unit 212b1 extracts and outputs a sound signal during a period in which the GATE signal A is at a high level. The gate unit 212b2 extracts and outputs a sound signal during a period in which the GATE signal B is at a high level. Here, the former is called a processing target sound signal A, and the latter is called a processing target sound signal B.

  The output signal of the gate unit 212b1 is input to the input unit 1 of the gate unit 212b3, and the output signal of the gate unit 212b2 is input to the input unit 0 of the gate unit 212b3. Therefore, during a period in which the invalidation signal input to the gate unit 212b3 is at a high level, the output signal (processing target sound signal A) of the gate unit 212b1 is output from the gate unit 212b3. When the invalidation signal input to the gate unit 212b3 is at a low level, the output signal (processing target sound signal B) of the gate unit 212b2 is output from the gate unit 212b3.

  On the other hand, the configuration for generating a delay signal in the delay signal generation units 212d1 and 212d2, and for referring to the past sound and invalidating the reference is the same as the configuration shown in FIG. 4A. That is, the mixer 212c1, the gate unit 212j1, the delay signal generation unit 212d1, the LPF 212f1, and the amplifier 212g1 have the same configuration as the mixer 211c, gate unit 211j, delay signal generation unit 211d, LPF 211f, and amplifier 211g shown in FIG. 4A. . Further, the mixer 212c2, the gate unit 212j2, the delay signal generation unit 212d2, the LPF 212f2, and the amplifier 212g2 have the same configuration as the mixer 211c, the gate unit 211j, the delay signal generation unit 211d, the LPF 211f, and the amplifier 211g illustrated in FIG. 4A. .

  However, the invalidation signal is supplied from the acoustic effect invalidation unit 222 to the gate unit 212j1, and the inverted signal of the invalidation signal is supplied to the gate unit 212j2. Therefore, the timing at which the signals input to the mixers 212c1 and 212c2 pass through the gate portions 212j1 and 212j2 is different from each other, and the signal does not pass through the other gate portion during the period when the signal passes through one gate portion (input). It becomes 0 level input to part 0).

  Note that, during a period in which the signals input to the mixers 212c1 and 212c2 do not pass through the gate portions 212j1 and 212j2, the outputs of the gate portions 212j1 and 212j2 are 0 level. The memory is cleared sequentially. Therefore, in the present embodiment, the period in which the outputs of the gate units 212j1 and 212j2 are 0 level due to the invalidation signal is set to be longer than the delay period in the delay signal generation units 212d1 and 212d2. As a result, it is possible to invalidate the acoustic effect in the delay signal generation units 212d1 and 212d2 in accordance with the music break (bar line) by the invalidation signal.

  The output of the delay signal generation unit 212d1 is input to the input unit 1 of the gate unit 212j3, and the output of the delay signal generation unit 212d2 is input to the input unit 0 of the gate unit 212j3. Accordingly, the delay signal output from the delay signal generation unit 212d1 is output from the gate unit 212j3 when the invalidation signal is at a high level, and the delay signal generation unit 212d2 is output during the period when the invalidation signal is at a low level. A delayed signal is output from the gate portion 212j3.

  In any case, in this embodiment, the gains of the wet sound indicated by the signal output from the gate section 212j3 and the dry sound indicated by the sound signal are adjusted by the amplifiers 212h and 212e and the mixer 212i as described above. And mixed and output as an acoustic effect signal.

(5-1) Example of operation:
Next, an operation example of the effector 102 will be described with reference to FIG. In FIG. 6, the GATE signal A and the GATE signal B output from the GATE signal generation unit 212a, the invalidation signal output from the acoustic effect invalidation unit 222, the sound signal input to the effector 102, the reset signal, and the inversion of the clock signal The example of the timing chart of the signal, the process target sound signal A and the process target sound signal B output from the gate units 212b1 and 212b2, and the delay signal output from the gate unit 212j3 is shown.

  Also, in the example shown in FIG. 6, the sound indicated by the sound signal is an example in which one measure is a music of 4 beats, and the timing of the bar line (supplied with n or n + 1) or beat is shown above the timing chart. The timing is shown.

  In the example shown in FIG. 6, the GATE signal A is at a high level for a period length of one beat from the bar line timing (same as the delay amount by the delay signal generation unit 212d1). The GATE signal B is at a high level only for a period length of 1/2 beat from the bar line timing (same as the delay amount by the delay signal generation unit 212d2).

  Therefore, the sound signal input to the gate unit 212b1 within the period of one beat from the bar line timing is output from the gate unit 212b1, and the sound signal input to the gate unit 212b1 during the other period is the gate unit. It is not output from 212b1. For this reason, as shown in FIG. 6, the sound signal within a period of one beat from the bar line timing is extracted as the processing target sound signal A and output from the gate unit 212b1.

  On the other hand, the sound signal input to the gate unit 212b2 within the period of 1/2 beat from the bar line timing is output from the gate unit 212b2, and the sound signal input to the gate unit 212b2 during the other period is It is not output from the gate part 212b2. For this reason, as shown in FIG. 6, the sound signal within the period of 1/2 beat from the bar line timing is extracted as the processing target sound signal B and output from the gate unit 212b2.

  The processing target sound signal A and the processing target sound signal B are input to the gate unit 212b3. In the gate part 212b3, the output signal is selected in accordance with the level of the invalidation signal. As in the n-th bar shown in FIG. 6, the processing target sound signal A is output from the gate unit 212b3 during the period in which the invalidation signal is at the high level. Thus, during the period when the invalidation signal is at the high level, the gate unit 212j1 passes and outputs the input signal to the input unit 1, and the gate unit 212j2 passes the input signal to the input unit 0. Therefore, in this state, 0 level is input to the delay signal generator 212d2, and the memory is erased. On the other hand, the output signal of the mixer 212c1 is output from the gate section 212j1.

  Then, during the period when the GATE signal A is at the high level in the n-th bar, the processing target sound signal A is input to the delay signal generation unit 212d1 via the mixer 212c1 and the gate unit 212j1. In this example, since the delay signal generation unit 212d1 gives a delay of one beat, no delay signal is output from the delay signal generation unit 212d1 during the period in which the GATE signal A is at the high level in the n-th bar.

  When the GATE signal A becomes low level in the n-th bar, the output from the gate part 212b1 becomes 0 level. However, in this case, the delay signal to which a delay of one beat is given by the delay signal generation unit 212d1 is input to the delay signal generation unit 212d1 through the feedback line including the LPF 212f1 and the amplifier 212g1, the mixer 212c1, and the gate unit 212j1. It becomes. Therefore, in the period in which the GATE signal A is at the low level at the n-th bar, the delay signal is sequentially output from the delay signal generation unit 212d1.

  On the other hand, the processing target sound signal B is output from the gate unit 212b3 during the period in which the invalidation signal is at the low level as in the (n + 1) th bar illustrated in FIG. Thus, during the period when the invalidation signal is at the low level, the gate unit 212j2 passes and outputs the input signal to the input unit 1, and the gate unit 212j1 passes the input signal to the input unit 0. Therefore, in this state, 0 level is input to the delay signal generator 212d1, and the memory is erased. On the other hand, the output signal of the mixer 212c2 is input to the gate portion 212j2.

  Then, during the period when the GATE signal B is at the high level in the (n + 1) th bar, the processing target sound signal B is input to the delay signal generation unit 212d1 via the mixer 212c2 and the gate unit 212j2. In this example, since the delay signal generation unit 212d2 gives a delay of ½ beat, no delay signal is output from the delay signal generation unit 212d2 during the period when the GATE signal B is at the high level in the n + 1 bar.

  When the GATE signal B becomes low level at the (n + 1) th bar, the output from the gate part 212b2 becomes 0 level. However, in this case, the delay signal to which a delay of 1/2 beat is given by the delay signal generation unit 212d2 is input to the delay signal generation unit 212d2 via the feedback line including the LPF 212f1 and the amplifier 212g1, the mixer 212c2, and the gate unit 212j2. It becomes a state. Therefore, in the period in which the GATE signal B is at the low level at the n + 1 bar, the delay signal is sequentially output from the delay signal generation unit 212d2.

  Further, the invalidation signal is also input to the gate unit 212j3, the delay signal output from the delay signal generation unit 212d1 is supplied to the input unit 1 of the gate unit 212j3, and the delay signal output from the delay signal generation unit 212d2 is the gate unit 212j3. Are supplied to the input unit 0. Therefore, the delay signal output from the delay signal generation unit 212d1 passes through the gate unit 212j3 when the invalidation signal is at a high level, and the delay output from the delay signal generation unit 212d2 when the invalidation signal is at a low level. The signal passes through the gate portion 212j3.

  As a result, since the delay signal shown in FIG. 6 is output from the gate unit 212j3 and input to the amplifier 212e, the amplifier 212e has one beat or half beat from the start timing of the bar line. A signal indicating a wet sound that can be generated during a period from the timing when the period has elapsed to the timing immediately before the bar line is output. On the other hand, since a sound signal is input to the amplifier 212h, the amplifier 212h outputs a signal indicating dry sound. And these wet sound and dry sound are mixed by the mixer 212i, and are output as an acoustic effect signal.

  In the above configuration, the past sound reference is invalidated in synchronization with the bar line which is a break of music. Further, the parameter of the sound effect changes in synchronization with the bar line that is a break of music. For this reason, the effect given to the output sound at the break of music greatly changes. For example, the delay signals are largely different before and after the bar line n + 1 shown in FIG.

(6) Other embodiments:
The above embodiment is an example for carrying out the present invention, and various other embodiments can be adopted. For example, the break can be acquired by various methods in the break acquisition means, and may be acquired based on a sound signal, or may be acquired based on a signal other than the sound signal. The break may be any timing that can be set on the time axis so that the music can be distinguished (contents of the song, etc.) before and after the break. Even if the break is a break of units (measures, beats, etc.) constituting the song It is also possible to set the timing of 1 / integer of the unit as a delimiter, a delimiter according to the content of the music (phrase break, etc.), or a delimiter that appears periodically at a predetermined cycle It may be.

  In the above-described embodiment, the past output sound reference is validated immediately after invalidating the past output sound reference in the break, but the past output sound reference is made after a predetermined period of time has elapsed. May be activated. Furthermore, after invalidating the reference of the past output sound, a configuration in which invalidation is continued may be employed.

  Further, in the sound effect signal output means, parameters indicating the strength of the effect, the degree of sound modulation, and the like may be variable. Furthermore, the effect and its parameters may be selectable by the user.

  FIG. 7B is a block diagram illustrating an example of a configuration in which a reset signal, a clock signal, a GATETIME signal, and a signal for specifying a delay amount that are input to the effector 102 can be specified by the user. In FIG. 7B, a signal input to the effector 102 shown in FIG. 5 is created by the real-time control unit 300 and the parameter control unit 400. The real-time control unit 300 includes a circuit that generates a reset signal and a clock signal (inverted signal of the clock signal) that define timings for operating the components of each part of the effector 102.

  In addition, the user can input numerical values that define the tempo, music breaks, and clock accuracy to the real-time control unit 300 through an interface (not shown). The tempo is a value that specifies the speed of music performance, and is, for example, the number of quarter notes in one minute. The value indicating the break of music is a value that specifies the timing period of the rising edge of the reset signal, and is specified by the number of measures or beats. For example, when one bar is designated, the bar line of each bar is used as a music break. When two beats are specified, the beat start timing is set as a music break every two beats. The clock accuracy is a value that specifies the cycle of the clock signal. For example, the length of the clock cycle can be specified by the note length.

  The real-time controller 300 determines the pulse width and period on the time axis of the clock signal based on the tempo and clock accuracy, generates a clock signal, and outputs an inverted signal thereof. The real-time controller 300 measures the number of the clock signals, and generates and outputs a reset signal each time the number of clock signals corresponding to the bar or beat period specified by the music break is measured. Then, the reset signal generated by the real-time control unit 300 and the inverted signal of the clock signal are input to the effector 102, so that the effector 102 can output the sound indicated by the sound signal at a speed specified by the user. Become. In addition, it becomes possible to invalidate the reference of the past sound at the music segment designated by the user.

  Further, the parameter control unit 400 receives a signal (a GATETIME signal (A / B), a signal indicating a delay amount (A / B)) indicating a variable parameter that can be selected when operating the constituent elements of each unit of the effector 102. A circuit for generating is provided.

  In addition, the user can input numerical values defining the tempo, clock accuracy, sampling frequency, time signature, GATE length (A / B), and delay length (A / B) to the parameter control unit 400 through an interface (not shown). . The sampling frequency indicates the number of samples per second when the sound signal is converted into a digital signal, and is a numerical value such as 44100 Hz, for example. The time signature is defined by a numerical value indicating the number of beats of one measure and a note corresponding to one beat in the music indicated by the sound signal, and is a numerical value such as 4/4 time signature, for example.

  The GATE length (A / B) is a numerical value for designating a period during which the processing target sound signals A and B are extracted from the sound signal. This is a numerical value indicated by the length (quarter note) or the like. The delay length (A / B) is a numerical value for designating a delay amount in the delay signal generation units 212d1 and 212d2, and is, for example, a numerical value indicating a delay period by a note length (quarter note) or the like. is there.

  The parameter control unit 400 outputs a signal (delay amount (A / B)) indicating the delay amount by the number of samples based on the sampling frequency, tempo, delay length, and time signature. That is, the parameter control unit 400 calculates a value indicating the delay amount by the number of samples by (sampling frequency / tempo) × (delay length / one beat in time signature), and generates a signal indicating the value. For example, it is assumed that the sampling frequency is 44100 Hz, the tempo is 120 (120 quarter notes / minute), the delay length is quarter notes, and the time signature is 4/4 time. In this case, since there are 44100 × 60 samples per minute, 44100 × 60/120 is the number of samples per beat.

  On the other hand, assuming that a quarter note that is a delay length is 1/4 and a quarter note that is one beat in the time signature is 1/4, (delay length / one beat in the time signature) is 1 (= (1 / 4) / (1/4)). Therefore, the delay amount is calculated as 22050 (= 44100/2). Of course, this processing is executed for each of A and B. Then, the parameter control unit 400 outputs the number of samples indicating the delay amount to the effector 102.

  Furthermore, the parameter control unit 400 generates and outputs a GATETIME signal indicating the period of extracting the processing target sound signals A and B from the sound signal based on the number of clock signals based on the GATE length and the clock accuracy. That is, the parameter control unit 400 generates a GATETIME signal based on the GATE length / clock accuracy. For example, when the GATE length is a quarter note and the clock accuracy is a 32nd note, the value of the GATETIME signal is 8 (= (1/4) / (1/32)). Then, when the GATETIME signal (A / B) and the delay amount (A / B) generated by the parameter control unit 400 are input to the effector 102, the effector 102 processes the sound signal having a length designated by the user. It is possible to extract the target sound signals A and B and determine the delay amount in the delay signal generation units 212d1 and 212d2. Of course, in the configuration shown in FIG. 4A and the configuration shown in FIG. 1, the user may be able to specify the speed and parameters of the music by adopting the same configuration as in FIG. 7B.

DESCRIPTION OF SYMBOLS 10 ... Effector, 20 ... Separation acquisition part, 21 ... Sound effect signal generation part, 22 ... Sound effect invalidation part, 23 ... Amplifier

Claims (6)

Delimiter acquisition means for acquiring a delimiter of music in the sound signal;
A sound effect signal generating means for outputting a sound effect signal having an effect on the sound signal, wherein the sound effect signal generating means is configured to generate a sound effect signal at an arbitrary time point with reference to a past output sound from the time point; ,
Acoustic effect invalidating means for invalidating the reference of the past output sound in the segment;
An effector comprising: The sound effect signal generating means is
A memory capable of recording the sound signal indicating the sound of a predetermined sampling period is provided, and the sound signal is sequentially input to the memory, and the sound effect signal is obtained based on the sound signal recorded in the memory. Generate
The sound effect invalidating means is
Invalidating the reference of the past output sound by erasing the sound signal recorded in the memory at the break;
The effector according to claim 1. The sound effect invalidating means is
Invalidating the reference of the past output sound by collectively erasing the sound signals recorded in the memory at the break;
The effector according to claim 2. The sound effect invalidating means is
Invalidating reference to the past output sound by stopping input of the sound signal to the memory over the sampling period before the break;
The effector according to claim 2. Separator acquisition function for acquiring music separators in sound signals,
A sound effect signal generating function for outputting a sound effect signal having an effect on the sound signal, the sound effect signal generating function for generating a sound effect signal at an arbitrary time with reference to an output sound past the time; and ,
An acoustic effect invalidation function for invalidating the reference of the past output sound in the segment;
An effector program that enables a computer to realize A break acquisition step for acquiring a music break in the sound signal;
A sound effect signal generating step of outputting a sound effect signal that gives an effect to the sound signal, wherein the sound effect signal generating step of generating a sound effect signal at an arbitrary time point with reference to an output sound past from the time point; ,
An acoustic effect invalidation step of invalidating the reference of the past output sound in the segment;
An effect imparting method including:

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