JP2004347640A - Device and program to modulate musical sound - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a musical sound modulating device in which vocoder performance is always reproduced in a same manner and chorus sound is generated in real time. <P>SOLUTION: When a control signal CntSig is [1], a carrier signal CS, which is vocoder processed in accordance with modulated waveform formant components, is generated as a vocoder output OUT. On the other hand, when the control signal CntSig is [0], the vocoder output OUT which is obtained by adding dry route modulated waveforms and the carrier signal CS, that is vocoder processed in accordance with the fixed formant components at the time point where the control signal CntSig is transitioned from [1] to [0], is generated. Therefore, vocoder performance is always reproduced in a same manner by fixing the formant components for every specified timing. Moreover, real time chorus sound is generated when the formant components are fixed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tone modulation device and a tone modulation program capable of always reproducing a vocoder performance in the same manner and generating a chorus sound in real time.
[0002]
[Prior art]
2. Description of the Related Art There is known an apparatus which forms a musical tone by modulating a musical tone signal output from a sound source with an externally input audio signal. As this kind of technology, for example, in Patent Document 1, an envelope level is extracted for each frequency band of an audio signal input from the outside by using a plurality of band-pass filters having different pass frequency bands. In addition, there is disclosed an apparatus that performs a so-called vocoder process for controlling the frequency characteristics of automatically played musical sounds to generate musical sounds as if they were human voices.
[0003]
[Patent Document 1]
Japanese Patent No. 2880721
[0004]
[Problems to be solved by the invention]
By the way, some tone modulating devices of the type disclosed in Patent Document 1 fix a formant component in response to a switch operation. For example, when performing a vocoder process on a tone to be automatically played, There is a problem that the formant component cannot be fixed at each timing, and therefore, the performance reproducibility is lacking.
In addition, the conventional tone modulation device only performs vocoder processing on the tone generated by the sound source in accordance with the formant component of the audio signal input from the outside, so that there is also a problem that a chorus sound cannot be generated in real time. is there.
Therefore, the present invention has been made in view of such circumstances, and provides a tone modulation apparatus and a tone modulation program capable of always reproducing a vocoder performance in the same manner and generating a chorus sound in real time. The purpose is.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a state setting means for alternately setting a first state and a second state, and an input when a first state is set by the state setting means. A first vocoder processing means for modulating a tone generated in response to a performance input in accordance with a formant component of a voice to output a vocoder sound, and a second state set by the state setting means The formant component of the voice input at the time of transition from the first state to the second state is held and fixed, and is generated corresponding to the performance input in accordance with the fixed formant component. A second vocoder processing means for mixing and outputting a vocoder sound obtained by modulating a musical tone and an input voice is provided.
[0006]
According to the second aspect of the present invention, the state setting means for alternately setting the first state and the second state for each designated period, and when the first state is set by the state setting means, the input sound is A first vocoder processing means for modulating a tone generated in response to a performance input in accordance with a formant component and outputting a vocoder sound; and a first vocoder processing means, wherein a second state is set by the state setting means. The formant component of the voice input at the time of the transition from the state to the second state is retained and fixed, and the tone generated corresponding to the performance input is modulated according to the fixed formant component. Second vocoder processing means for mixing and outputting the vocoder sound obtained as described above and the input voice.
[0007]
According to the third aspect of the present invention, the state setting means for alternately setting the first and second states based on the time-series data, and when the first state is set by the state setting means, the input sound is A first vocoder processing means for modulating a tone generated in response to a performance input in accordance with a formant component and outputting a vocoder sound; and a first vocoder processing means, wherein a second state is set by the state setting means. The formant component of the voice input at the time of the transition from the state to the second state is retained and fixed, and the tone generated corresponding to the performance input is modulated according to the fixed formant component. Second vocoder processing means for mixing and outputting the vocoder sound obtained as described above and the input voice.
[0008]
According to the invention described in claim 4, a state setting step of alternately setting the first and second states and, if the first state is set in the state setting step, the formant component of the input voice is A first vocoder processing step of outputting a vocoder sound by modulating a tone generated in response to a performance input, and a first state when the second state is set in the state setting step. From the second state to the second state, hold and fix the formant component of the voice input, and modulate the tone generated corresponding to the performance input in accordance with the fixed formant component. And a second vocoder processing step of mixing and outputting the obtained vocoder sound and the input voice.
[0009]
According to the invention described in claim 5, a state setting step of alternately setting the first and second states for each specified period, and a sound input when the first state is set in the state setting step A first vocoder processing step of modulating a tone generated in response to a performance input and outputting a vocoder sound in accordance with the formant component of A formant component of a voice input at the time of transition from the first state to the second state is held and fixed, and a tone generated in response to a performance input in accordance with the fixed formant component And a second vocoder processing step of mixing and outputting the vocoder sound obtained by modulating the vocoder sound and the input voice.
[0010]
According to the invention described in claim 6, a state setting step of alternately setting the first and second states based on time-series data, and an input voice when the first state is set in the state setting step A first vocoder processing step of modulating a tone generated in response to a performance input and outputting a vocoder sound in accordance with the formant component of A formant component of a voice input at the time of transition from the first state to the second state is held and fixed, and a tone generated in response to a performance input in accordance with the fixed formant component And a second vocoder processing step of mixing and outputting the vocoder sound obtained by modulating the vocoder sound and the input voice.
[0011]
According to the present invention, when set to the first state, a tone generated in response to a performance input is modulated to output a vocoder sound according to the formant component of the input voice, and the vocoder sound is output to the second state. When set, the formant component of the voice input at the time of transition from the first state to the second state is held and fixed, and in response to a performance input, the formant component is fixed according to the fixed formant component. The vocoder sound obtained by modulating the tone generated by the above is mixed with the input voice and output.
Therefore, if the first and second states are set at predetermined timings, the formant component can be fixed at each timing, thereby making it possible to always reproduce the vocoder performance in the same manner. In the second state, the vocoder sound and the input sound are mixed, so that a chorus sound can be generated in real time.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an electronic musical instrument equipped with a tone modulation device according to an embodiment of the present invention will be described with reference to the drawings.
[0013]
A. Configuration of the embodiment
(1) Overall configuration
FIG. 1 is a block diagram showing the overall configuration of an electronic musical instrument according to the present invention. In this figure, reference numeral 1 denotes a keyboard for generating key-on / key-off events corresponding to key press / release operations (performance operations) and performance information including note numbers, velocities, and the like. Reference numeral 2 denotes a switch unit including various switches provided on the instrument panel, and generates a switch event corresponding to the operated switch. A ROM 3 stores various control programs. The various control programs include a main routine, a vocoder timer process, and a sequencer process described later.
[0014]
Reference numeral 4 denotes a RAM used as a work area of the CPU 5, for example, as shown in FIG. 2, temporarily storing various register / flag data such as registers ENV_PREV [1] to [n] in which envelope levels of formant components are stored. I do. Note that the intended purpose of the envelope level of each formant component stored in the registers ENV_PREV [1] to [n] will be described later.
The CPU 5 executes various control programs stored in the ROM 3, for example, generates musical tone parameters (note on / off events and the like) corresponding to the performance information generated by the keyboard 1 and sends them to the sound source 10. It controls various parts of the musical instrument, such as changing the operation state according to the generated switch event. The processing operation of the CPU 5 according to the gist of the present invention will be described later in detail.
[0015]
Reference numeral 6 denotes a display unit provided on the musical instrument panel, which displays an operation state, a parameter setting state, and the like of each section of the musical instrument according to a display control signal supplied from the CPU 5. Reference numeral 7 denotes a MIDI interface for inputting / outputting MIDI data (MIDI message) to / from an external MIDI device in a serial format under the control of the CPU 5. Reference numeral 8 denotes a microphone that converts an input voice into a voice signal and outputs the voice signal. Reference numeral 9 denotes an A / D converter that A / D converts an audio signal input from the microphone 8 and outputs the converted signal as a modulated waveform. Reference numeral 10 denotes a sound source configured by a well-known waveform memory reading method, which generates a waveform corresponding to a musical tone parameter (note on / off event or the like) supplied from the CPU 5. The sound source 10 supplies a part of the generated waveform to the DSP 11 as a carrier signal CS (modulated waveform), and outputs a tone waveform W in which another generated waveform is mixed with the vocoder output OUT supplied from the DSP 11.
[0016]
The DSP 11 performs vocoder processing for modulating the carrier signal CS input from the sound source 10 as a modulated waveform according to the formant component of the modulation waveform (audio signal) supplied from the A / D converter 9. The obtained vocoder output OUT is output to the sound source 10, and its configuration will be described later in detail. Reference numeral 12 denotes a D / A converter that converts the tone waveform W output from the sound source 10 into an analog waveform signal and outputs the analog waveform signal. Reference numeral 13 denotes a sound system which performs filtering such as removal of unnecessary noise from a waveform signal input from the D / A converter 12 at the preceding stage, amplifies the signal, and causes a speaker 14 to generate sound.
[0017]
(2) Configuration of DSP 11
Next, the configuration of the DSP 11 will be described with reference to FIG. The DSP 11 includes an analyzer 20, a modulator controller 30, a synthesizer 40, and an adder 50. The analysis unit 20 includes band-pass filters (hereinafter, referred to as BPF) 20a-1 to 20a-n and envelope detectors (hereinafter, referred to as ENV) 20b-1 to 20b-n. The BPFs 20a-1 to 20a-n each have a pass frequency band corresponding to the formant frequency of a human voice, and formant of a modulated waveform (audio signal) supplied from the A / D converter 9 under the control of the CPU 5. Extract the components. Each of the ENVs 20b-1 to 20b-n includes an absolute value circuit including a rectifier and a smoothing circuit including an LPF, and detects and outputs an envelope level of a formant component extracted by the BPFs 20a-1 to 20a-n.
[0018]
The modulator control unit 30 includes a low-frequency oscillator (hereinafter, referred to as LFO) 31, a signal control unit 32, and envelope control circuits 33-1 to 33-n. The LFO 31 generates a control signal CntSig that changes to “0” or “1” at regular intervals in synchronization with the timer clock Clock supplied from the CPU 5. The signal control unit 32 controls the opening and closing of the dry route of the modulation waveform (audio signal) according to the control signal CntSig, and outputs a through output instruction signal or a latch instruction signal to the envelope control circuits 33-1 to 33-n. .
[0019]
That is, when the control signal CntSig is “0”, a dry route for inputting the modulation waveform (audio signal) to the adder 50 is connected, and the control signal CntSig is supplied to the envelope control circuits 33-1 to 33-n. Outputs a latch instruction signal for latching the envelope level at the time of transition from “1” to “0”.
On the other hand, when the control signal CntSig is “1”, the dry route for inputting the modulation waveform (audio signal) to the adder 50 is cut, and the detected envelope is sent to the envelope control circuits 33-1 to 33-n. A through output instruction signal for outputting the level as it is is output.
When the through output instruction signal is supplied, the envelope control circuits 33-1 to 33-n detect the envelope levels input from the BPFs 20a-1 to 20a-n of the analysis unit 20 and output the detected envelope levels to the synthesis unit 40 side. On the other hand, when the latch instruction signal is supplied, the envelope level detected at that time is latched and output to the synthesizing section 40 side.
[0020]
The combining unit 40 includes BPFs 40a-1 to 40a-n, multipliers 40b-1 to 40b-n, and an adder 40c. The BPFs 40a-1 to 40a-n have the same pass frequency band as the BPFs 20a-1 to 20a-n of the analysis unit 20, and convert the carrier signal CS (modulated waveform) supplied from the sound source 10 into n pass frequencies. Filter by dividing into bands. The multipliers 40b-1 to 40b-n multiply the respective outputs of the BPFs 40a-1 to 40a-n by the respective envelope levels output from the envelope control circuits 33-1 to 33-n. The adder 40c adds and combines the outputs of the multipliers 40b-1 to 40b-n and outputs the result to the adder 50. The adder 50 adds the output of the adder 40c and the modulation waveform (audio signal) of the dry route input via the signal control unit 32 to generate a vocoder output OUT.
[0021]
B. Operation of the embodiment
Next, the operation of the embodiment having the above configuration will be described with reference to FIGS. Hereinafter, the operation of the main routine executed by the CPU 5 will be described first as an overall schematic operation, and then the operation of the vocoder timer process executed by the DSP 11 at predetermined intervals together with this main routine will be described.
[0022]
(1) Main routine operation
When the power is turned on, the CPU 5 reads out a predetermined control program from the ROM 3, loads it into itself, and executes the main routine shown in FIG. When the main routine is executed, the CPU 5 first proceeds to step SA1, resets various registers and flags stored in the RAM 4, sets initial values, and initializes the tone generator 10 and the DSP 11 to perform initialization. Perform processing. After the initialization is completed, the process proceeds to step SA2, in which a switch process corresponding to the switch operation of the switch unit 2, for example, an operation mode in which a modulation waveform (audio signal) is input using the microphone 8 and the A / D converter 9 is set. And the like.
Subsequently, in step SA3, a keyboard process for instructing the sound source 10 to generate / mute a musical tone in response to a key press / release operation of the keyboard 1 is executed. Then, in step SA4, for example, a display process for displaying the contents of the mode set in the switch process in step SA2 on the display unit 6 is executed. Next, at step SA5, other processes such as receiving a MIDI message from an external MIDI device via the MIDI interface 7 and executing a MIDI process for generating a musical tone are executed. Thereafter, the above steps SA2 to SA5 are repeatedly executed until the power is turned off.
[0023]
(2) Operation of vocoder timer processing
Next, the operation of the vocoder timer process executed by the DSP 11 will be described with reference to FIG. The DSP 11 executes the vocoder timer process at regular intervals. When the execution timing comes, the process proceeds to step SB1 in FIG. 5 to determine whether or not the control signal CntSig generated by the LFO 31 is “0”. Hereinafter, the operation will be described separately when the control signal CntSig is “0” and when it is “1”.
[0024]
(1) When the control signal CntSig is "0"
If the control signal CntSig is "0", the result of the determination in step SB1 is "YES", and the flow advances to the next step SB2 to determine whether or not the register CS_PREV is "1". The register CS_PREV holds the control signal CntSig from the previous processing. Therefore, in step SB2, it is determined whether the control signal CntSig has transitioned from "1" to "0". When the control signal CntSig maintains “0”, the determination result is “NO”, and the process proceeds to Step SB4 described later. When the control signal CntSig transitions from “1” to “0”, the determination result Is "YES", and the routine proceeds to step SB3.
[0025]
In step SB3, the current envelope levels stored in the registers ENV [1] to ENV [n], that is, the respective envelope levels currently detected by the BPFs 20a-1 to 20a-n of the analysis unit 20, respectively, are stored in a register ENV_PREV [1]. ＥＮENV_PREV [n]. Next, in step SB4, the envelope levels stored in the registers ENV_PREV [1] to ENV_PREV [n] are supplied to the multipliers 40b-1 to 40b-n of the synthesis unit 40, respectively.
[0026]
Next, in step SB5, the modulation waveform (audio signal) of the dry route is supplied to the adder 50. Thereafter, the process proceeds to step SB13, in which the current value of the control signal CntSig is stored in the register CS_PREV. In the subsequent step SB14, the BPF 20a-1 of the analysis unit 20 is activated when the control signal CntSig changes from “1” to “0”. 20a-n generate a vocoder output OUT obtained by adding a carrier signal CS (modulated waveform) subjected to vocoder processing according to each envelope level output and a dry route modulation waveform (audio signal).
As described above, when the control signal CntSig is “0”, the carrier signal CS (subjected to vocoder processing according to the formant component fixed when the control signal CntSig transits from “1” to “0”) A vocoder output OUT is generated by adding the modulation waveform (modulation waveform) and the modulation waveform (voice signal) of the dry route.
[0027]
(2) When the control signal CntSig is "1"
In this case, the operation mode differs between a certain period immediately after the control signal CntSig changes from “0” to “1” and the period after that. Hereinafter, the operation immediately after the transition until a certain period elapses and the operation after the certain period elapses will be described separately.
[0028]
a. Operation immediately after the transition until a certain period elapses
If the control signal CntSig has just transitioned from “0” to “1”, the result of each determination in steps SB1 and SB6 becomes “NO”, the process proceeds to step SB8, and the number of processes N is set in the register k. Subsequently, in step SB9, (register ENV [i] + register ENV_PREV [i]) / 2 is calculated while incrementing the pointer i from “1” to “n”, and the calculated value is stored in the register ENV_PREV [i]. Store. That is, the average value of the current envelope level and the previous envelope level is calculated, and the average value is updated and registered as the previous envelope level.
[0029]
Next, in step SB10, the envelope levels of the registers ENV_PREV [1] to ENV_PREV [n] updated in step SB9 are supplied to the multipliers 40b-1 to 40b-n of the synthesis unit 40. Subsequently, in step SB11, the number of processes N stored in the register k is decremented. Thereafter, in steps SB13 and SB14 described above, after the current value of the control signal CntSig is stored in the register CS_PREV, the vocoder output OUT is generated from the adder 50.
Thereafter, while the control signal CntSig is maintained at "1", step SB9 and subsequent steps are repeatedly executed N times, and the register ENV_PREV [1] is set so that the current envelope level and the previous envelope level do not become discontinuous. ＥＮENV_PREV [n] is changed exponentially.
[0030]
b. Operation after a certain period
After a lapse of a predetermined period in which step SB9 and subsequent steps are repeatedly executed N times, the determination result of step SB7 becomes “NO” and the process proceeds to step SB12 where the data is stored in the registers ENV [1] to ENV [n]. The current envelope levels are supplied to the multipliers 40b-1 to 40b-n of the synthesis unit 40. Thereafter, the process proceeds to steps SB13 and SB14 described above, where the current value of the control signal CntSig is stored in the register CS_PREV, and the vocoder output OUT is generated from the adder 50.
[0031]
In this manner, the current envelope level and the previous envelope level are changed exponentially until a predetermined period elapses immediately after the control signal CntSig transitions from “0” to “1” so that the previous envelope level does not become discontinuous. The envelope levels of the registers ENV_PREV [1] to ENV_PREV [n] are supplied to multipliers 40b-1 to 40b-n of the synthesizing unit 40, and the carrier signal CS (received) from the sound source 10 to be vocoder-processed in response thereto. (Modulated waveform) as the vocoder output OUT.
After a lapse of the certain period, the current envelope levels stored in the registers ENV [1] to ENV [n] are supplied to the multipliers 40b-1 to 40b-n of the synthesizing unit 40. The carrier signal CS (modulated waveform) from the sound source 10 to be vocoder-processed is used as the vocoder output OUT.
[0032]
(3) Specific operation
Next, a specific operation of the DSP 11 will be described with reference to FIG. In FIG. 6, (A) represents a control signal CntSig generated by the LFO 31. (B) shows a modulated waveform (audio signal) input via the microphone 8 and the A / D converter 9. (C) represents the combined output of the combining unit 40 (the output of the adder 40c). (D) shows a dry route modulation waveform (audio signal) input to the adder 50 via the signal control unit 32.
[0033]
As shown in FIG. 6A, when the control signal CntSig that changes in a two-measure period of four beats is output from the LFO 31 with the change timing immediately before the beginning of the bar as the change timing, the timing shown in FIG. It is assumed that a modulation waveform (audio signal) has been input to the DSP 11.
Then, in the first to fourth beats of the first measure in which the control signal CntSig maintains “1”, the control signal CntSig changes according to the envelope level for each formant component of the modulated waveform (audio signal) that changes every beat. The carrier signal CS (modulated waveform) subjected to vocoder processing is supplied to the sound source 10 as a vocoder output OUT. As a result, a musical sound waveform W of a voice that changes to “Aio” is generated.
[0034]
Subsequently, when the control signal CntSig transitions from “1” to “0” immediately before the beginning of the second bar, the DSP 11 holds the envelope level for each formant component of the modulation waveform (audio signal) at that transition. Then, in the first to fourth beats of the second bar in which the control signal CntSig maintains “0”, the carrier signal CS (modulated waveform) subjected to vocoder processing according to each of the held envelope levels has a dry route. The vocoder output OUT obtained by adding the modulation waveform (audio signal) is supplied to the sound source 10. As a result, a musical tone waveform W of sound is generated in which the carrier signal CS (modulated waveform) of “O” and the modulated waveform (audio signal) that changes every beat and “Kakikuko” are mixed.
[0035]
As described above, according to the present embodiment, the carrier signal CS (modulated waveform) subjected to vocoder processing according to the formant component of the modulation waveform (audio signal) is output during the period when the control signal CntSig is “1”. On the other hand, when the control signal CntSig transitions from “1” to “0” during the period when the control signal CntSig is “0”, the carrier signal CS (subjected to vocoder processing according to the formant component fixed at the time when the control signal CntSig transits from “1” to “0”) Since the vocoder output OUT is generated by adding the modulation waveform (modulation waveform) and the dry route modulation waveform (sound signal), the formant component can be fixed at each specified timing, so that the vocoder performance can always be reproduced in the same manner. become.
In addition, in order to generate a vocoder output OUT in which a carrier signal CS (modulated waveform) subjected to vocoder processing and a dry route modulation waveform (audio signal) are added when the formant component is fixed as described above, It is possible to generate a chorus sound.
[0036]
(4) Modified example
In the above-described embodiment, the formant component is fixed at each specified timing using the control signal CntSig generated by the LFO 31. However, a note generated in response to the reproduction of the sequence data in the RAM 4 is used instead. A formant component may be fixed at a timing according to an on / note-off event or a note-on / note-off event input from an external MIDI device via the MIDI interface 7. In order to fix the formant component at a timing according to a note-on / note-off event generated in response to the reproduction of the sequence data in the RAM 4, the sequencer process shown in FIG. 7 is executed at predetermined intervals.
[0037]
When the execution timing comes, the determination result of step SC1 shown in FIG. 7 becomes “YES”, and the process proceeds to step SC2 to determine whether or not a note event has occurred. If the event is other than a note event, the determination result is "NO", and the process proceeds to Step SC3 to perform an event execution instruction process for instructing execution of a process corresponding to the generated event type, thereby completing this process.
On the other hand, if a note event has occurred, the result of the determination in step SC2 is "YES", and the flow advances to step SC4 to determine whether the note event is an on event. If the event is an ON event, the determination result is "YES", and the process proceeds to Step SC5 to increment the register NoteOn for counting the number of note-on events, and to advance. On the other hand, if the event is an off event, the determination result is "NO", and the flow advances to step SC6 to decrement the register NoteOn.
[0038]
Next, in step SC7, it is determined whether or not the value of the register NoteOn is “0”, that is, whether or not all notes are off. If all notes are off, the determination result is "YES", and the flow advances to step SC8 to set the control signal CntSig to "1". On the other hand, if all notes are not turned off, the result of determination in step SC7 is “NO”, and the flow advances to step SC9 to set the control signal CntSig to “0”.
As described above, according to the modification, the control signal CntSig is set to “1” when the reproduction state of the sequence data is all note-off, and the control signal CntSig is set to “0” when at least one note-on occurs. To fix the formant component. Therefore, during all note-offs, a carrier signal CS (modulated waveform) subjected to vocoder processing according to the formant component of the modulation waveform (audio signal) is generated as a vocoder output OUT, and at least one note-on occurs. If there is, the carrier signal CS (modulated waveform) to be vocoded and the dry route of the dry route are changed according to the formant component fixed at the time of transition from the “all note off state” to the “all note off state”. A vocoder output OUT is generated by adding the modulation waveform (audio signal). Thereby, by reproducing the sequence data, reproducibility of the setting of the control signal CntSig can be realized.
[0039]
Further, instead of fixing the formant component at the timing according to the note-on / note-off event, an operation pedal is provided, and the control signal CntSig is changed according to the operation of the operation pedal. It is also possible to add a chorus effect by fixing the formant component at the timing intended by the user.
[0040]
【The invention's effect】
According to the first and fourth aspects of the present invention, when set to the first state, a vocoder sound is modulated by modulating a tone generated in response to a performance input in accordance with a formant component of an input voice. And, when set to the second state, retains and fixes the formant component of the audio input at the time of transition from the first state to the second state, and also fixes the fixed formant component , The vocoder sound obtained by modulating the musical sound generated corresponding to the performance input and the input sound are mixed and output. Therefore, if the first and second states are set at each predetermined timing, the formant component can be fixed at each timing, whereby the vocoder performance can always be reproduced in the same manner. In the second state, the vocoder sound and the input sound are mixed, so that a chorus sound can be generated in real time.
According to the second and fifth aspects of the present invention, when the first state is set for each specified period, the tone generated in response to the performance input is modulated in accordance with the formant component of the input voice. When a vocoder sound is output and set to the second state every specified period, the formant component of the sound input at the time of transition from the first state to the second state is held and fixed, According to the fixed formant component, the vocoder sound obtained by modulating the tone generated corresponding to the performance input and the input voice are mixed and output, so the formant component is fixed at each specified timing This makes it possible to always reproduce the vocoder performance in the same manner. In the second state, the vocoder sound and the input sound are mixed, so that a chorus sound can be generated in real time.
According to the third and sixth aspects of the present invention, when the first state is set by the time series data, the tone generated in response to the performance input is modulated according to the formant component of the input voice. When the second state is set by the time series data, the vocoder sound is output, and the formant component of the sound input at the time of transition from the first state to the second state is held and fixed. At the same time, according to the fixed formant component, the vocoder sound obtained by modulating the musical sound generated corresponding to the performance input and the input voice are mixed and output, so that the time-series data is specified. The formant component can be fixed at each timing, so that the vocoder performance can always be reproduced in the same manner. In the second state, the vocoder sound and the input sound are mixed, so that a chorus sound can be generated in real time.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of an embodiment according to the present invention.
FIG. 2 is a memory map showing a main register configuration of a RAM 4.
FIG. 3 is a block diagram illustrating a configuration of a DSP 11;
FIG. 4 is a flowchart showing an operation of a main routine.
FIG. 5 is a flowchart showing an operation of a vocoder timer process.
FIG. 6 is a diagram for explaining a specific operation of the DSP 11;
FIG. 7 is a flowchart showing an operation of a sequencer process according to a modified example.
[Explanation of symbols]
1 keyboard
2 Switch section
3 ROM
4 RAM
5 CPU
6 Display
7 MIDI interface
8 microphone
9 A / D converter
10 sound sources
11 DSP
12 D / A converter
13 Sound system
14 Speaker

Claims (6)

State setting means for alternately setting the first and second states;
When the first state is set by the state setting means, first vocoder processing for modulating a tone generated in response to a performance input and outputting a vocoder sound in accordance with a formant component of the input voice Means,
When the second state is set by the state setting means, the formant component of the voice input at the time of transition from the first state to the second state is held and fixed, and the fixed formant is Second vocoder processing means for mixing and outputting a vocoder sound obtained by modulating a tone generated in response to a performance input and an input voice according to the component; Music modulation device. State setting means for alternately setting the first and second states for each specified cycle;
When the first state is set by the state setting means, first vocoder processing for modulating a tone generated in response to a performance input and outputting a vocoder sound in accordance with a formant component of the input voice Means,
When the second state is set by the state setting means, the formant component of the voice input at the time of transition from the first state to the second state is held and fixed, and the fixed formant is Second vocoder processing means for mixing and outputting a vocoder sound obtained by modulating a tone generated in response to a performance input and an input voice according to the component; Music modulation device. State setting means for alternately setting the first and second states according to time-series data;
When the first state is set by the state setting means, first vocoder processing for modulating a tone generated in response to a performance input and outputting a vocoder sound in accordance with a formant component of the input voice Means,
When the second state is set by the state setting means, the formant component of the voice input at the time of transition from the first state to the second state is held and fixed, and the fixed formant is Second vocoder processing means for mixing and outputting a vocoder sound obtained by modulating a tone generated in response to a performance input and an input voice according to the component; Music modulation device. A state setting step of alternately setting the first and second states;
When a first state is set in the state setting step, a first vocoder that modulates a tone generated in response to a performance input and outputs a vocoder sound according to a formant component of an input voice Processing steps;
When the second state is set in the state setting step, the formant component of the voice input at the time of transition from the first state to the second state is held and fixed, and the fixed A second vocoder processing step of mixing and outputting a vocoder sound obtained by modulating a musical tone generated in response to a performance input according to a formant component and an input voice, by a computer. Characteristic tone modulation program. A state setting step of alternately setting the first and second states for each specified cycle;
When a first state is set in the state setting step, a first vocoder that modulates a tone generated in response to a performance input and outputs a vocoder sound according to a formant component of an input voice Processing steps;
When the second state is set in the state setting step, the formant component of the voice input at the time of transition from the first state to the second state is held and fixed, and the fixed A second vocoder processing step of mixing and outputting a vocoder sound obtained by modulating a musical tone generated in response to a performance input according to a formant component and an input voice, by a computer. Characteristic tone modulation program. A state setting step of alternately setting the first and second states according to time-series data;
When a first state is set in the state setting step, a first vocoder that modulates a tone generated in response to a performance input and outputs a vocoder sound according to a formant component of an input voice Processing steps;
When the second state is set in the state setting step, the formant component of the voice input at the time of transition from the first state to the second state is held and fixed, and the fixed A second vocoder processing step of mixing and outputting a vocoder sound obtained by modulating a musical tone generated in response to a performance input according to a formant component and an input voice, by a computer. Characteristic tone modulation program.

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