JPH1031481A - Waveform generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate various waveforms being full of variety by only pad operation by detecting the intensity of operation from a indication signal, generating its operation information, deciding a corresponding reproduction mode, and forming a waveform. SOLUTION: The intensity of beating a pad is detected based on pad data PD supplied from a pad 3 in accordance with pad operation. Next, a CPU 4 converts the intensity into velocity Vel. And, a read-out direction of waveform data read out from a waveform memory is decided referring to a read-out direction conversion table TBL1, when a read-out direction is forward, a sound source 7 is instructed so that waveform data of a percussion instrument sound corresponded to the pad 3 is read out successively for an end address from a start address. When a read-out direction is a reverse direction, a sound source 7 is instructed so that waveform data of a percussion instrument sound corresponded to the pad 3 is read out reversely for a start address from an end address.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a waveform generator suitable for use in, for example, electronic percussion instruments.

[0002]

2. Description of the Related Art Conventionally, an electronic percussion instrument having a plurality of pads and hitting each of these pads to produce various percussion sounds such as a snare drum sound and a percussion sound has been known. This type of musical instrument includes a sensor that detects a pad operation in which a player hits a pad surface with a hand or a stick,
A waveform generator for generating a percussion instrument sound in accordance with the sensor output, and generating a percussion instrument sound having a tone color corresponding to the type of pad operated by the pad.

A sensor for detecting a pad operation is provided for each pad, and detects vibration (or pressure) generated when the pad is operated, and detects vibration (or pressure) exceeding a predetermined level. Occasionally generates a key-on signal.
On the other hand, in the waveform generating section, percussion sounds (waveform data) of various timbres whose waveforms are sampled are stored in a waveform memory, and assigned to the pad in accordance with a key-on signal output from a pad operated pad sensor. The percussion instrument sound (waveform data) of the timbre is read from the waveform memory and the waveform is reproduced.

[0004]

In the conventional waveform generator described above, a percussion instrument sound of a tone assigned to each pad is generated or generated in order to generate a waveform based on generation of a key-on signal by pad operation. The generated percussion instrument sound is merely controlled in volume according to the pad operation intensity.

That is, when a waveform is generated only by operating the pad, the generated waveform is monotonous, and there is a problem that a waveform rich in various changes such as giving a timbre change cannot be generated. Therefore, the present invention has been made in view of such circumstances, and an object of the present invention is to provide a waveform generator capable of generating various varied waveforms only by operating a pad.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a waveform generation instructing means for generating an instruction signal for instructing the generation of a waveform in accordance with a predetermined operation; An operation information generating means for detecting the intensity of the operation from an instruction signal generated by the instruction means and generating operation information corresponding to the detected intensity; and a reproduction mode corresponding to the operation information generated by the operation information generating means. And waveform reproducing means for performing waveform reproduction in accordance with the determined reproduction mode.

According to a second aspect of the present invention, the operation information generating means detects a speed of the operation and generates operation information corresponding to the detected speed. .

According to the third aspect of the present invention, the waveform reproducing means changes the read direction of the stored waveform in accordance with the operation information generated by the operation information generating means. In which the shape of the waveform to be reproduced is varied.

[0009] Similarly, claim 4 is dependent on claim 1.
According to the invention described in (1), the waveform reproducing means changes a method of reproducing a waveform by changing a method of reading a stored waveform according to operation information generated by the operation information generating means.

[0010] Further, claim 5 is dependent on claim 1 above.
According to the invention described in (1), the waveform reproducing means changes a reproduction pitch by changing a reading speed of a stored waveform in accordance with the operation information generated by the operation information generating means.

According to the sixth aspect of the present invention, the waveform reproducing means reads a stored waveform and responds to the operation information generated by the operation information generating means for the read waveform. In addition, the frequency components of the waveform to be reproduced by performing the filtering are made different.

According to the seventh aspect of the present invention, the waveform reproducing means reads out the stored waveform, and the operation information generated by the operation information generating means for the read out waveform. Select the presence or absence of additional sound according to
When an additional sound is added, the read waveform is synthesized with a detuned waveform obtained by detuning the reproduction pitch of the waveform.

In the present invention, when the waveform generation instructing means generates an instruction signal for instructing waveform generation in response to a predetermined operation,
The operation information generation means detects the intensity of the operation from the instruction signal, generates operation information corresponding to the detected intensity, the waveform reproduction means determines a reproduction mode corresponding to the operation information, and generates a waveform according to the determined reproduction mode. Reproduce. Therefore, since various reproduction modes can be determined only by the pad operation of hitting the pad, it is possible to generate a variety of various waveforms.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A waveform generator according to the present invention can be applied to an electronic musical instrument, a musical sound controller for generating a game sound effect, and the like. Hereinafter, an electronic musical instrument according to an embodiment of the present invention will be described as an example with reference to the drawings. A. First Embodiment (1) Configuration FIG. 1 is a block diagram showing a configuration of an electronic musical instrument according to an embodiment of the present invention. In this figure, 1 is a keyboard,
It generates performance information such as a key-on / key-off signal corresponding to a key press / release operation, a key code, and velocity information corresponding to a key press speed (strength).

Reference numeral 2 denotes a panel switch group arranged on the front of the instrument panel. The panel switch group 2 includes an on / off switch for turning on the power, a tone selection switch, an operation mode changeover switch (not shown), and the like.
The operation mode switching switch switches between a keyboard mode in which a musical tone is formed in response to a key press and release operation of the keyboard 1 and a pad mode in which a percussion instrument sound is generated by a pad operation on a pad 3 described later. Further, under the pad mode, it is possible to select a mode for generating various waveforms rich in change only by the pad operation.
This will be described sequentially in the fifth embodiment.

Reference numeral 3 denotes a pad for performing a pad operation which is performed by a player's hand or a stick. The pad 3 includes, for example, a piezoelectric element mounted on the pad surface. The piezoelectric element excites a voltage corresponding to a blow given by the pad operation, amplifies the voltage, and A / D converts the amplified voltage to generate pad data PD. Is configured to occur. Reference numeral 4 denotes a CPU for controlling each section of the musical instrument. In the keyboard mode, the CPU 4 instructs a tone generator 7 to be described later to generate a musical tone in accordance with the performance information supplied from the keyboard 1. A key-on / key-off signal and a velocity Vel are generated in accordance with the supplied pad data PD, and supplied to the sound source 7 to instruct generation of a percussion instrument sound. The operation in the pad mode in the CPU 4 will be described later in detail.

A ROM 5 stores various control programs loaded into the CPU 4 and various parameters and tables for tone control. The various parameters and tables referred to here include, for example, D
It refers to a velocity table VCTBL for converting a filter coefficient, a key pressing speed (strength) or a pad operation speed (strength) given to a CF (Digital Controlled Filter) into a velocity Vel, a reading direction conversion table described later, and the like.

FIG. 2 is a diagram showing an example of the velocity table VCTBL. In this example, a velocity Vel proportional to the pad operation speed (strength) is generated. Note that the velocity table VCTBL shown in this figure is an example showing a linear conversion, but may be a non-linear conversion instead. In this example, the data is stored in the ROM. Alternatively, for example, the data may be stored in a rewritable nonvolatile memory such as a flash memory, and the table contents may be stored according to the player's preference. May be variably set.

Next, the configuration of the embodiment will be described with reference to FIG. 1 again. In the figure, reference numeral 6 denotes a RAM used as a work area of the CPU 4, which temporarily stores various calculation results, register / flag values, and the like. Sound source 7
It has a plurality of tone generation channels configured by a well-known waveform memory reading method and operating in a time-division manner. This sound source 7
Stores waveform data of a plurality of timbres including various percussion sounds, reads out preset waveform data according to a key-on signal supplied from the CPU 2, and converts the read waveform data into an envelope level according to velocity data. And outputs a waveform signal W obtained by performing desired filtering. At the time of filtering, the filter coefficient supplied from the CPU 4 is set to D
Set to CF.

As shown in FIG. 3, among the waveform data stored in the waveform memory provided in the sound source 7, various percussion instrument sounds have a start point address indicating a read start position and an end point indicating a read end position. Is defined. This is because the percussion instrument sound is composed of an attack waveform and a release waveform.

Reference numeral 8 denotes a D / A conversion circuit, which converts the waveform signal W output from the sound source 7 into an analog waveform signal and supplies it to a sound system 9 at the next stage. The sound system 9 performs, for example, filtering on the analog waveform signal supplied from the preceding stage to remove unnecessary noise and the like, amplifies the signal, and emits the sound from a speaker.

(2) Operation Next, the operation of the first embodiment having the above configuration will be described with reference to FIG. 4 and FIG. The feature of the first embodiment resides in that the waveform reading direction is made different according to the velocity Vel generated based on the pad data PD, and that the generated percussion instrument sound is varied. Hereinafter, the operation will be described in detail.

First, when power is turned on to the electronic musical instrument according to the present embodiment, the CPU 4 loads a control program stored in the ROM 5, and then initializes various registers and flags. At this time, the aforementioned panel switch group 2
When the operation mode changeover switch is set to the pad mode, the pad processing routine shown in FIG. 4 is executed, and the process proceeds to step SA1.

In step SA1, based on the pad data PD supplied from the pad 3 in response to the pad operation, it is detected how strong the pad has been hit. Next, when the process proceeds to step SA2, the CPU 4 stores the detected pad operation intensity in the above-described velocity table VCTB.
L (see FIG. 2) is converted to velocity Vel.
Then, in the next step SA3, based on the converted velocity Vel, the reading direction conversion table TBL1 is referred to to determine the reading direction of the waveform data read from the waveform memory.

Here, the reading direction conversion table TBL1 stored in the ROM 5 will be described with reference to FIG. The reading direction conversion table TBL1 specifies the waveform memory reading direction according to the range of the velocity Vel. In the example shown in FIG. 5, when the velocity Vel is in the range of "1 to 63", the waveform memory is shifted from the start address. “Forward” is read in the forward direction to the end address, while the velocity Vel is “63 to 1”.
27 "is" reverse "for reading the waveform memory in the reverse direction from the end address to the start address.

Such a read direction conversion table TBL
When the reading direction is determined from the velocity Vel by 1, the CPU 4 advances the process to step SA 4, and determines whether or not the reading direction is “forward”. Here, when the reading direction becomes “forward”,
The result of the determination is "YES", the process proceeds to the next step SA5, and among the various percussion instrument sound waveform data stored in the waveform memory, the percussion instrument sound waveform data associated with the operated pad 3 is started. It instructs the sound source 7 to read sequentially from the address to the end address.

On the other hand, when the velocity Vel is "63 to 12"
7 ", and when the reading direction is" reverse ", the result of the determination in step SA4 is" NO ", and the process proceeds to step SA6. In step SA6, the CPU 4 reversely reads out the waveform data of the percussion sound associated with the operated pad 3 from the end address toward the start address from among the waveform data of the various percussion sounds stored in the waveform memory. To the sound source 7. As a result, a percussion instrument sound having a tone different from that in the forward reading is reproduced.

As described above, in the first embodiment, since the reading direction of the waveform data is made different according to the velocity Vel, the manner of reproducing the waveform can be changed only by operating the pad. By the way, in order to change the waveform reading direction in this way, if an operation switch for designating the direction is provided, the operation can be performed in the same manner as described above. It becomes extremely unnatural as a form. In addition, there is a demerit in which a new operation switch is provided, which leads to an increase in product cost. Therefore, in the first embodiment, not only the way of reproducing the waveform can be changed merely by operating the pad, but also a very natural performance form can be realized, which can contribute to the reduction of the product cost.

B. Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. The configuration of the second embodiment is the same as that of the first embodiment.
The description is omitted because it is the same as the embodiment. The second embodiment is characterized in that the method of waveform reproduction is made different according to the velocity Vel.

That is, in the second embodiment, the ROM
The reproduction method of the waveform data read out from the waveform memory is determined with reference to the reproduction method conversion table TBL2 stored in No. 5. FIG. 6 is a diagram illustrating an example of the reproduction direction conversion table TBL2. As can be seen from the table TBL2 shown in this figure, the velocity Vel is “1-42”, “43-
84 "and" 85-127 ", the percussion instrument sound is reproduced based on the reproduction method A, the reproduction method B, and the reproduction method C, respectively.

In the reproducing method A, as shown in FIG. 7A, waveform data from key-on to key-off is read and reproduced. Note that the key-on here refers to a case where the above-described pad data PD has become equal to or higher than a predetermined level, while the key-off refers to a case where the pad data PD has become equal to or lower than a predetermined level. Specifically, when a voltage generated in response to a pad operation hit exceeds a certain level, it is regarded as key-on, and when the voltage falls below a certain level, it is key-off.

In the reproduction method B, as shown in FIG. 2B, the waveform data is read out from the point when the key is turned on in response to the first pad operation, and the reading is continued even if the key is turned off, and the second time. When the key is turned on by the pad operation, the waveform reading is stopped. Further, reproduction method C
As shown in FIG. 2C, all waveforms are read out and reproduced uniquely from the point in time when the key is turned on in response to the first pad operation.

Next, the operation of the second embodiment for reproducing percussion instrument sounds by the reproduction methods A to C according to the velocity Vel will be described with reference to FIG. As in the first embodiment, when the electronic musical instrument according to the second embodiment is powered on,
After loading the control program stored in the ROM 5, the CPU 4 initializes various registers and flags. At this time, if the operation mode changeover switch of the panel switch group 2 is in the pad mode and the reproduction method selection mode is set, the pad processing routine shown in FIG. 8 is executed, and the process proceeds to step SB1. Proceed.

In step SB1, it is detected based on the pad data PD how strong the pad 3 has been hit. Next, when the process proceeds to step SB2, the CPU 4 converts the detected pad operation intensity into velocity Vel via the above-described velocity table VCTBL (see FIG. 2). Then, in the next step SB3, based on the converted velocity Vel, a reproduction method is determined by referring to the above-mentioned reproduction method conversion table TBL2 (see FIG. 6).

Next, at step SB4, it is determined whether or not the determined reproduction method is "A", that is, whether the waveform data from key-on to key-off is read and reproduced. Here, when the determined reproduction method is “A”,
The determination result is "YES", and the process proceeds to Step SB5 to read out the waveform data of the percussion instrument sound associated with the operated pad 3 from the key-on time to the key-off time at which the pad operation of the predetermined intensity is performed. The sound source 7 is instructed to reproduce.

On the other hand, when the determined reproduction method is other than "A", the result of the determination in step SB4 is "NO".
, And the process proceeds to Step SB6. Step SB
At 6, it is determined whether or not the determined reproduction method is "B". Here, if the reproduction method B has been determined, the determination result is “YES”, and the process proceeds to Step SB7. In step SB7, as shown in FIG. 7 (b), the waveform data is read from the point when the key is turned on in response to the first pad operation, and the reading is continued even when the key is turned off.
When the key is turned on in response to the second pad operation, an instruction is issued to the sound source 7 to stop reading the waveform.

On the other hand, when the reproduction method C is determined, the result of the determination in step SB6 is "NO", and the CPU
4 advances the processing to step SB8. In step SB8, as shown in FIG. 7C, the sound source 7 is instructed to read and reproduce all the waveforms uniquely from the time when the key is turned on in response to the first pad operation. As described above, in the second embodiment, since the waveform reading mode is changed according to the velocity Vel of the pad operation, it is possible to change the mode in which the waveform is generated only by the pad operation. Also in the second embodiment, the form of generating a waveform can be changed by operating the pad without providing a new operation switch, which can contribute to a reduction in product cost.

C. Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. The configuration of the third embodiment is the same as that of the first embodiment, and a description thereof will be omitted. The third embodiment is characterized in that the reproduction pitch of the percussion instrument sound is varied according to the velocity Vel. That is, in the third embodiment, the read speed of the waveform data read from the waveform memory is changed with reference to the reproduction pitch conversion table TBL3 stored in the ROM 5, and the reproduction pitch of the percussion instrument sound is changed.

FIG. 9 shows a reproduction pitch conversion table TBL3.
FIG. 4 is a diagram showing an example of the velocity Vel, as can be seen from the table shown in FIG.
4 "and" 85-127 ", the original pitch is set to" -1 octave "," ± 0 octave ", and" +
The percussion instrument sound is reproduced at the reproduction pitch changed by "one octave".

Next, with reference to FIG.
The operation of the third embodiment for reproducing percussion instrument sounds at a reproduction pitch according to the following will be described. As in the first embodiment, when the electronic musical instrument according to the third embodiment is powered on, the CPU 4
Loads the control program stored in the ROM 5 and then initializes various registers and flags. At this time, if the operation mode changeover switch of the panel switch group 2 is in the pad mode and the reproduction pitch selection mode is set, the pad processing routine shown in FIG. 10 is executed, and the process proceeds to step SC1. Proceed.

In step SC1, the CPU 3 detects how strong the pad 3 has been hit based on the pad data PD. In step SC2, the CPU 4 stores the detected pad operation strength in the above-described velocity table. VCT
It is converted to velocity Vel via BL (see FIG. 2). Then, in the next step SC3, based on the converted velocity Vel, the reproduction pitch is determined based on the above-described reproduction pitch conversion table TBL3 (see FIG. 9).

In step SC4, it is determined whether or not the determined reproduction pitch is "+1 octave", that is, whether the waveform is reproduced by doubling the frequency of the original pitch. Here, when the determined playback pitch is “+1 octave”,
The result of the determination is "YES", the process proceeds to step SC5, the read speed of the waveform data of the percussion instrument sound associated with the operated pad 3 is increased (double speed), and the frequency of the original pitch is doubled. Is instructed to reproduce the sound.

On the other hand, when the determined reproduction pitch is "+1"
In cases other than "octave", the result of the determination in step SC4 is "NO", and the process proceeds to step SC6. In step SC6, the determined reproduction pitch is “± 0
"Octave", that is, whether or not the original pitch is maintained. Here, if the reproduction pitch is determined to be the original pitch, the determination result is “YES”, and the process proceeds to Step SC7. In step SC7, the sound source 7 is instructed to reproduce the waveform with the original pitch of the waveform data of the percussion instrument sound associated with the pad 3 operated by the pad.

On the other hand, if the determined reproduction pitch is "-1 octave", the result of the determination in step SC6 is "NO", and the CPU 4 advances the process to step SC8. In step SC8, the pad 3 operated by the pad
The sound source 7 is instructed to reduce the reading speed of the waveform data of the percussion instrument sound associated with (1) (1/2 times speed) and reproduce the waveform in which the frequency of the original pitch is reduced to half.

As described above, in the third embodiment, since the waveform reproduction pitch is changed according to the velocity Vel of the pad operation, it is possible to change the form in which the waveform is generated only by the pad operation. Also in the third embodiment, the form in which the waveform is generated can be changed by operating the pad without providing a new operation switch.
It can also contribute to reducing product costs.

D. Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIGS. The configuration of the fourth embodiment is the same as that of the first embodiment, and a description thereof will be omitted. The fourth embodiment is characterized in that the type of filter applied at the time of waveform generation is changed according to the velocity Vel. That is, in the fourth embodiment, referring to the filter selection table TBL4 stored in the ROM 5, the filtering content applied to the waveform data read from the waveform memory is changed, and the timbre of the percussion instrument sound is changed.

FIG. 11 shows a filter selection table TBL4.
FIG. 4 is a diagram showing an example of the velocity Vel, as can be seen from the table shown in FIG.
In the case of “4” and “85 to 127”, “low-pass filter”, “no filter”, and “high-pass filter” are designated, respectively.

Next, with reference to FIG.
The operation of the fourth embodiment for reproducing percussion instrument sounds using a filter according to the following will be described. As in the first embodiment, when the electronic musical instrument according to the fourth embodiment is powered on, C
After loading the control program stored in the ROM 5, the PU 4 initializes various registers and flags. At this time, if the operation mode changeover switch of the panel switch group 2 is in the pad mode and the filter selection mode is set, the pad processing routine shown in FIG. 12 is executed, and the process proceeds to step SD1. .

In step SD1, based on the pad data PD, how much the pad 3 has been hit is detected. When the process proceeds to step SD2, the CPU 4 stores the detected pad operation intensity in the above-described velocity table. VCT
It is converted to velocity Vel via BL (see FIG. 2). Then, in the next step SD3, based on the converted velocity Vel, the above-described filter selection table T
A filter to be used is selected based on BL4 (see FIG. 11).

At step SD4, it is determined whether or not the selected filter is a "low-pass filter". Here, when the "low-pass filter" is selected, the determination result is "YES", the process proceeds to step SD5, and the waveform data of the percussion instrument sound associated with the operated pad 3 is read and read. The sound source 7 is instructed to generate a percussion instrument sound in which high-frequency components have been cut by performing low-pass filtering on the waveform data. That is, the CPU 4 supplies necessary filter coefficients so that the DCF mounted on the sound source 7 operates as a low-pass filter.

On the other hand, when the selected filter is other than the "low-pass filter", the result of the determination in step SD4 is "NO", and the process proceeds to step SD6. In step SD6, it is determined whether or not "no filter" is selected. Here, when “no filter” is selected, the determination result is “YES”,
Proceeding to step SD7, the sound source 7 is instructed to read out the waveform data of the percussion instrument sound associated with the operated pad 3 and reproduce the waveform as it is.

On the other hand, when the "high-pass filter" is selected, the result of the determination in step SD6 is "N".
O ", and the CPU 4 advances the process to step SD8. In step SD8, the waveform data of the percussion instrument sound associated with the operated pad 3 is read out, and the sound source 7 is subjected to high-pass filtering on the read-out waveform data to generate a percussion instrument sound in which low-frequency components are cut. To instruct.

As described above, in the fourth embodiment, since the type of filter used for generating a waveform is changed in accordance with the velocity Vel of the pad operation, it is possible to change the waveform content generated only by the pad operation. Has become. In addition, the waveform content generated by only operating the pad can be changed without providing a new operation switch, which can contribute to a reduction in product cost.

E. Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to FIGS. The configuration of the fifth embodiment is the same as that of the first embodiment, and a description thereof will be omitted. Fifth
The embodiment is characterized in that the presence or absence of an additional sound is selected according to the velocity Vel. That is, in the fifth embodiment, the additional sound selection table TBL stored in the ROM 5
Referring to FIG. 5, when adding an additional sound, a percussion instrument sound read from the waveform memory and an additional sound obtained by detuning the percussion sound are synthesized to change the tone color tendency of the percussion sound.

FIG. 13 is a diagram showing an example of the additional sound selection table TBL5. As can be seen from the table shown in FIG. 13, the velocities Vel are "1-63" and "64-".
In the case of “127”, “no additional sound” and “+700 cent additional sound” are specified.

Next, referring to FIG. 14, the velocity Vel
The operation of the fifth embodiment for reproducing the percussion instrument sound by selecting the presence or absence of an additional sound according to the above will be described. As in the first embodiment, when the electronic musical instrument according to the fifth embodiment is powered on, the CPU 4 loads a control program stored in the ROM 5 and then initializes various registers and flags. At this time, if the operation mode changeover switch of the panel switch group 2 is in the pad mode and the additional sound selection mode is set, the pad processing routine shown in FIG. 14 is executed, and the process proceeds to step SE1. Proceed.

In step SE1, the CPU 3 detects how strong the pad 3 has been hit on the basis of the pad data PD, and proceeds to step SE2. In step SE2, the CPU 4 stores the detected pad operation intensity in the above-described velocity table. VCT
It is converted to velocity Vel via BL (see FIG. 2). Then, in the next step SE3, based on the converted velocity Vel, the above-described additional sound selection table TB
The presence / absence of an additional sound is selected based on L5 (see FIG. 13).

At step SE4, it is determined whether or not "no additional sound" is selected. Here, when “no additional sound” is selected, the determination result is “YES”,
The process proceeds to step SE5, where the waveform data of the percussion instrument sound associated with the operated pad 3 is read out from the waveform memory, and the sound source 7 is instructed to generate a percussion instrument sound to which no additional sound is added.

On the other hand, “+700 cent additional sound”
Is selected, the result of the determination in step SE4 is "NO", and the process proceeds to step SE6.
In step SE6, the waveform data of the percussion instrument sound associated with the operated pad 3 is read out from the waveform memory with the original pitch, while the same waveform data is read out on 19/1.
The sound source 7 is instructed to add the detuned sound read at 2 × speed and pitch-up by +700 cents to the percussion sound of the original pitch for reproduction.

As described above, in the fifth embodiment, the presence or absence of an additional sound is selected in accordance with the velocity Vel, and when adding the additional sound, the percussion sound read from the waveform memory and the additional sound obtained by detuning the percussion sound are used. , It is possible to change waveform contents such as harmony generated only by pad operation.

As described above, in the above-described first to fifth embodiments, the “waveform reading direction”, the “waveform reproducing method”, the “reproduction pitch”,
Since "filter type" and "presence / absence of additional sound" can be selected, various waveforms with various changes can be generated only by pad operation. In each of the above-described embodiments, each of the tables TBL1 to 5
Has been treated as a fixed one, but of course, the contents of each of the tables TBL1 to TBL5 may be variably set, or the table contents are automatically rewritten according to the playing style of hitting the pads. Alternatively, it is also possible to prepare a plurality of tables in advance and select and use one of them.

In each of the embodiments described above, the case where percussion instrument sound is generated according to the pad operation has been described.
The gist of the present invention is not limited to this. For example, the present invention can be applied to a well-known electronic musical instrument that performs initial touch / after touch control in accordance with the strength (or speed) of a key press / release operation. That is, while performing the initial touch / after touch control, as in the above-described embodiments, the “waveform reading direction”, the “waveform reproducing method”, the “reproducing pitch”,
By performing the "filter type" and "selecting the presence / absence of additional sound" differently in the form of modifying the generated waveform, various waveforms can be formed.

[0063]

According to the present invention, when the waveform generation instructing means generates an instruction signal for instructing the generation of a waveform in accordance with a predetermined operation, the operation information generating means detects the intensity of the operation from the instruction signal. Generate operation information corresponding to the intensity
Since the waveform reproducing means determines the reproduction mode corresponding to the operation information and reproduces the waveform according to the determined reproduction mode, it is possible to generate various varied waveforms only by the pad operation of hitting the pad.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment according to the present invention.

FIG. 2 is a velocity conversion table V in the first embodiment.
It is a figure showing an example of CTBL.

FIG. 3 is a diagram for explaining an address form of a waveform memory of a sound source 7 in the first embodiment.

FIG. 4 is a flowchart illustrating the operation of the first embodiment.

FIG. 5 is a diagram illustrating an example of a read direction conversion table TBL1 in the first embodiment.

FIG. 6 shows a reproduction method conversion table TB in the second embodiment.
It is a figure showing an example of L2.

FIG. 7 is a diagram for explaining reproduction methods A to C defined in the table TBL2.

FIG. 8 is a flowchart illustrating the operation of the second embodiment.

FIG. 9 is a reproduction pitch conversion table T according to the third embodiment.
It is a figure showing an example of BL3.

FIG. 10 is a flowchart illustrating the operation of the third embodiment.

FIG. 11 is a filter selection table T according to a fourth embodiment.
FIG. 9 is a diagram for explaining an example of BL4.

FIG. 12 is a flowchart illustrating the operation of the fourth embodiment.

FIG. 13 shows an additional sound selection table TB in the fifth embodiment.
It is a figure for explaining an example of L5.

FIG. 14 is a flowchart illustrating the operation of the fifth embodiment.

[Explanation of symbols]

3 pad (waveform generation instructing means) 4 CPU (waveform generation instructing means, operation information generating means, waveform reproducing means) 5 ROM (operation information generating means) 6 RAM 7 sound source (waveform reproducing means)

Claims (7)

[Claims] 1. A waveform generation instructing means for generating an instruction signal for instructing waveform generation in accordance with a predetermined operation, and an intensity of the operation is detected from the instruction signal generated by the waveform generation instructing means. Operation information generation means for generating corresponding operation information; and waveform reproduction means for determining a reproduction mode corresponding to the operation information generated by the operation information generation means and reproducing a waveform in accordance with the determined reproduction mode. Characteristic waveform generator. 2. The waveform generator according to claim 1, wherein said operation information generating means detects a speed of said operation and generates operation information corresponding to the detected speed. 3. The waveform reproducing unit according to claim 1, wherein the waveform reproducing unit changes the readout direction of the stored waveform according to the operation information generated by the operation information generating unit to change the shape of the waveform to be reproduced. Waveform generator. 4. The apparatus according to claim 1, wherein said waveform reproducing means changes a method of reproducing a waveform by changing a method of reading a stored waveform according to operation information generated by said operation information generating means. Waveform generator. 5. The waveform generating apparatus according to claim 1, wherein said waveform reproducing means changes a reproducing pitch by changing a reading speed of a stored waveform according to operation information generated by said operation information generating means. apparatus. 6. The waveform reproducing means reads out a stored waveform, performs filtering in accordance with operation information generated by the operation information generating means on the read-out waveform, and varies a frequency component of the reproduced waveform. The waveform generator according to claim 1, wherein: 7. The waveform reproducing means reads out a stored waveform, selects presence or absence of an additional sound for the read waveform according to operation information generated by the operation information generating means, and adds the additional sound. 2. The waveform generator according to claim 1, wherein the read waveform is synthesized with a detuned waveform obtained by detuning a reproduction pitch of the waveform.