JP4238807B2 - Sound source waveform data determination device - Google Patents

Description

  According to the present invention, waveform data is stored in a storage device corresponding to a timbre in order to generate a musical tone signal, and a waveform data determination device for sound source for determining waveform data to be used from the waveform data and a sound source The present invention relates to a waveform data determination program.

2. Description of the Related Art Conventionally, an electronic music device of a waveform memory sound source method (waveform data table sound source method) that synthesizes and generates musical tone waveform data by reading waveform data stored in a storage device in accordance with keyboard operation and performance data. It is known (see, for example, Patent Document 1).
FIG. 5 is a functional configuration diagram showing an example of a conventional electronic music apparatus using a waveform memory sound source method.
When one of a plurality of keys on the keyboard 31 is pressed, the key pressing detection unit 33 detects this key pressing, and a note-on NON indicating the key pressing and a pitch (note) corresponding to the key pressed. Number) Output NN data. In addition, key press speed (velocity) VEL data may be output. These data are output as signals for instructing sound generation (hereinafter referred to as key-on signals).
On the other hand, when one of the plurality of tone color switches (tone color SW) 32 is operated, the SW detection unit 34 detects the operation state and outputs a tone color designation signal. Recently, a tone color designation signal is often output using a menu screen displayed on a display, a general-purpose cursor switch, or the like.

The frequency number FN conversion unit 35 converts the note number NN into a frequency number FN and outputs it to the address counter 36.
The waveform memory 37 stores waveform data corresponding to the timbre in order to synthesize and generate a musical tone signal corresponding to the timbre designation signal. The waveform data further stores different waveform data depending on the note number NN, or different waveform data depending on the velocity VEL range.
When the note-on NON data is input, the address counter 36 sets the top address of the waveform data to be read from the waveform memory 37 by the tone color instruction signal output from the SW detection unit 34. When the waveform memory 37 stores different waveform data depending on the sound range, it depends on the sound range determined according to the note number NN, and when different waveform data is stored depending on the velocity VEL range, the velocity VEL is stored. Depending on the range, the start address varies.
The address counter 36 accumulates and adds the frequency number FN in a predetermined processing cycle, and determines the read address of the waveform memory 37 from the head address according to the integer value.

The waveform data read from the waveform memory 37 is multiplied by the volume envelope waveform data output in synchronization with the note-on NON input from the volume envelope generator (volume EG) 40 in the multiplier 38, and is digital / analog. The signal is converted into an analog signal by a converter (DAC) and output to a sound system (not shown).
A tone color designation signal, a note number NN, and a velocity VEL are input to the volume EG 40, thereby changing the shape of the volume envelope waveform.
Note that sampling waveform data for one sound may be stored as the waveform data stored in the waveform memory 37. In this case, since the sampling waveform data for one sound has a volume envelope, the multiplier 38 and the volume EG40 can be omitted.

In the electronic music apparatus using the above-described waveform memory sound source method, when different waveform data is stored in the waveform memory 37 according to the tone color and tone range, when sound is generated with the same tone number and the same note number NN, The sound is generated using exactly the same waveform data.
On the other hand, if different waveform data is stored depending on the velocity VEL range, if the sound is generated with the same tone, the same note number NN, and the same velocity VEL range, the same waveform data is used for sound generation. Will be.
As described above, when the electronic music apparatus is played with the same tone color, the same note number NN may be pronounced using exactly the same waveform data.
There is no particular problem when such pronunciation is performed at timings separated from each other. However, when the same note number NN is continuously pronounced, if exactly the same musical sound waveform is continuously pronounced, it becomes a mechanically too accurate sound that is different from the natural sound waveform. Therefore, there was a problem that it sounded unnatural.
In particular, with natural instruments that specify pitches using a method other than the keyboard, such as trumpet or harmonica, the pitch may vary depending on how you press the key or how you blow, even if you try to produce the same pitch continuously and accurately. It is slipping or shaking. For this reason, if the electronic music apparatus continuously produces the same note number with the tone color of such a natural musical instrument, the musical sound waveform will sound remarkably unnatural.
Japanese Patent Application Laid-Open No. 08-077674

  The present invention has been made to solve the above-described problems, and a sound source waveform that eliminates the mechanical unnaturalness of a musical sound waveform that is pronounced when playing with a waveform memory sound source type electronic music device. An object of the present invention is to provide a data determination device and a sound source waveform data determination program.

In the invention according to claim 1, a plurality of different waveform data is stored corresponding to a predetermined tone color, and waveform data to be used is determined from the plurality of different waveform data. A sound source waveform data determination device, wherein a plurality of different waveform data corresponding to the predetermined tone color is stored as a plurality of different waveform data sets having a whole range as one set, and a key-on signal is received. A means for comparing the note number of the pronunciation in which the predetermined tone was last set with the note number of the current pronunciation when the tone set in the current pronunciation is the predetermined tone; , when a match of both the note number is detected, included in different waveform data set and the waveform data set containing the waveform data used in the sound which the predetermined tone color is set to the last The waveform data that instructs the waveform data to be used in this pronunciation, and, when a mismatch between both the note number is detected waveform including a waveform data said predetermined tone using the tone that was set last Means for instructing waveform data included in the same waveform data set as the data set as waveform data used for the current sound generation is provided.
According to a second aspect of the present invention, there is provided a sound source waveform data determining program for realizing the sound source waveform data determining apparatus according to the first aspect of the present invention using a computer.
Therefore, in the case of continuous pronunciation with outstanding mechanical accuracy, it is possible to eliminate the unnaturalness of the musical tone waveform with a simple configuration by using different waveform data even with the same tone color and pitch. .

Here, the above-mentioned “matching of both note numbers” includes not only the case where both note numbers are completely matched but also the case where the difference between both note numbers is within an allowable range.
The above-described note number comparison and waveform data determination are performed only when the timbre set to the sound instructed by the input key-on signal is one or more specific timbres that are conspicuous in mechanical unnaturalness. You may make it perform.
When only one type of predetermined tone color is used for performance, the above-mentioned sound generation in which the predetermined tone color is set last is the sound generation immediately before instructed by the previously input key-on signal.

The plurality of different waveform data corresponding to the predetermined timbre described above is, for example, as a plurality of different waveform data sets in which different waveform data is stored according to the sound range, and different waveform data is stored in each sound range. , Stored in the storage device.
In the case of such a waveform data set, when coincidence of both note numbers NN is detected by the note number comparison means described above, the waveform data instruction means described above is used for the sound generation in which the predetermined tone color was set last. The waveform data included in the waveform data set different from the waveform data set including the waveform data may be indicated as the waveform data used for the current sound generation.

In addition, a plurality of different waveform data corresponding to the predetermined tone color described above is further stored with different waveform data depending on the combination of the sound range and velocity VEL range, and also in each combination of the sound range and velocity range. It may be stored in a storage device as a plurality of different waveform data sets in which different waveform data is stored. In the case of such a waveform data set, when coincidence of both note numbers NN is detected by the note number comparison means described above, the waveform data instruction means described above is used for the sound generation in which the predetermined tone color was set last. The waveform data included in the waveform data set different from the waveform data set including the waveform data may be indicated as the waveform data used for the current sound generation.
In the case of the latter waveform data set, instead of the above-described note number comparing means, a key-on signal for instructing sound generation is input, and when the sound color set for the current sound generation is the predetermined sound color, the predetermined sound color Is the comparison means for comparing the note number NN and velocity VEL range of the last pronunciation and the note number NN and velocity VEL range of the current pronunciation. In this comparison means, both note numbers NN and both When the coincidence of the velocity VEL ranges is detected together, the waveform data instruction means described above is a waveform data set different from the waveform data set including the waveform data used for the sound generation in which the predetermined tone color was last set. May be designated as the waveform data used for the current pronunciation.

According to the present invention, in an electronic music apparatus of a waveform memory sound source system, when a sound of a natural musical instrument that is difficult to be sounded at all times is generated, continuous sound with the same pitch is mechanically unnatural. Has the effect of making inconspicuous.
A method of forcibly changing parameters such as the pitch and velocity VEL of the continuous pronunciation of the same pitch is also conceivable. However, using different waveform data can express natural musical instrument performance. For example, a musical instrument performance can be expressed with more natural waveform data by using a plurality of different waveform data slightly different in pitch change tendency, amplitude change tendency, frequency component change tendency, and the like.

FIG. 1 is an explanatory diagram showing a first example of waveform data used in an embodiment of the present invention.
In an electronic music apparatus that synthesizes a musical sound signal using waveform data corresponding to a tone color and generates a sound, the waveform data is stored in a storage device as sound source waveform data.
In the sound source waveform data determining apparatus according to the embodiment of the present invention, for a predetermined tone color, a plurality of different waveform data corresponding to the predetermined tone color is stored in the storage device. The waveform data to be used is determined from the different waveform data.
In the illustrated example, three different waveform data sets A, B, and C are stored corresponding to one predetermined tone color, and each waveform data set is further different in accordance with five tone ranges. Waveform data is stored, and different waveform data is stored in each sound range.
However, two or more waveform data sets may be used. Each waveform data set may store only one type of waveform data in the entire sound range.

The note number NN is data representing the pitch.
Focusing on the waveform data set A, when the note number NN belongs to the range of 0 or more (n ₁ -1) or less, the waveform data of the waveform data A1, the note range NN of n ₁ or more (n ₂ -1) or less Are different waveform data such as waveform data A2 of the waveform data A2.
Similarly, for the other waveform data sets B and C, different waveform data B1 to B5 and C1 to C5 are determined according to the sound range.
The fact that the waveform data sets A, B, and C are different means that the waveform data is also different in each sound range within each waveform data set A, B, and C. However, the number of divisions of the sound range and the range of the divided sound ranges need not be the same among all the waveform data sets A, B, and C.

The illustrated waveform data sets A, B, and C relate to one specific tone color. When a plurality of different waveform data sets are stored in a predetermined timbre different from the specific timbre, the number of the waveform data sets may be plural, and the waveform is common to each timbre. There is no need to determine the number of data sets.
It is not necessary to store a plurality of different waveform data sets for all timbres that can be produced by the electronic music apparatus. Only when a timbre whose mechanical accuracy is particularly conspicuous, for example, a timbre of a non-keyboard instrument, a plurality of different waveform data sets need only be stored for that timbre. When other timbres are set, if one type of waveform data is stored for a combination of timbres and tone ranges as usual, the balance between the obtained effect and the memory capacity and cost can be achieved.

The sound source waveform data determining apparatus according to the embodiment of the present invention inputs a key-on signal that instructs sound generation, and a tone color set to a sound generation (current sound generation) instructed by the current key-on signal is a predetermined tone color. Is compared with the note number NN of the pronunciation in which the predetermined tone color was last set, and the note number NN of the current pronunciation.
If the two note numbers NN do not match, the note of the pronunciation specified by the key-on signal input this time in the waveform data set specified for the predetermined tone set for the current sound generation Specifies the waveform data of the range to which the number NN belongs.
In this case, even if the designated waveform data set is not switched, the note number NN is different, so that an unnatural sound is not produced.

On the other hand, when the two note numbers NN coincide with each other, a waveform data set different from the waveform data set instructed for the pronunciation in which the predetermined tone color is set last is designated.
Information for specifying the waveform data set instructed for the pronunciation in which the predetermined tone color is set last is stored in the memory.
Next, in the designated waveform data set, the waveform data corresponding to the sound range to which the note number NN of the current pronunciation belongs is designated as the waveform data used for the current pronunciation.
Therefore, the waveform data that is different from the waveform data used for the sound that was set last for the predetermined tone set for the current sound is indicated as the waveform data used for the current sound. It will not be.

There are various methods for instructing different waveform data sets each time both note numbers NN match under the above-described comparison conditions. For example,
First, the waveform data set to be instructed is switched in order, such as A → B → C → A →.
Second, the instructed waveform data set is randomly selected from those excluding the currently read waveform data set and switched.
Third, a basic waveform data set (for example, waveform data set A) is determined. Next, the waveform data set to be instructed is switched to one of the waveform data sets B and C different from the above in order or randomly, and thereafter, the basic waveform data set A and the waveform data set different from this Switch alternately.
As described above, after instructing the waveform data set, it is instructed to use the waveform data included in the waveform data corresponding to the sound range to which the note number NN of the current pronunciation belongs.

Differences between the waveform data sets A, B, and C are such that the timbre is not felt different.
For example, movements such as unidirectional changes in pitch and fluctuations along the time axis (sample number) in the waveform data are different. More specifically, the waveform data set A has a stable pitch, the waveform data set B has a pitch fluctuation and the pitch is not stable, and the waveform data set C has a fluctuation method different from B.
Further, for example, fluctuations along the time axis of the volume and the frequency component are different. Furthermore, these variations are combined.

Different waveform data as described above can be obtained by picking up a performance sound of a natural musical instrument with a microphone and A / D converting it.
Even with the same pitch, different sampling data can be obtained for each recording due to slight differences in how the instrument is played. Search for characteristic sampling data such as those whose pitch and volume are stable along the time axis, those whose pitch is fluctuating, those whose volume is fluctuating, and store them as they are or after being processed. Store in the device.

In the above description, in order to use different waveform data, the entire waveform data set is instructed to be switched at once, and then the waveform data to be used for the current sound generation is instructed. According to this method, until the entire waveform data set is subsequently instructed to be switched once again, the waveform data set instructed by the current sound generation can be used even when sounding different note numbers NN with the same tone. The included waveform data will be used.
Instead, only the waveform data corresponding to the range of the note number NN of the current pronunciation may be instructed to be switched. In this case, even for the same tone color, the waveform data set including the waveform data to be used is different for each sound range. For this reason, it is necessary to store in the memory information for specifying the instructed waveform data set for each tone range where the predetermined tone color was last set.

FIG. 2 is an explanatory diagram showing a second example of waveform data used in the embodiment of the present invention.
In this embodiment, the sound velocity VEL is divided into a plurality of ranges. Even for the same tone, different waveform data is used depending on the combination of the range and velocity VEL, and each waveform data set uses different waveform data for each combination of range and velocity VEL. .
Therefore, a plurality of different waveform data sets A, B, and C are stored in the storage device for a predetermined tone color, and each waveform data set stores different waveform data according to the combination of the sound range and the velocity VEL, In addition, different waveform data is stored in each combination of the sound range and the velocity VEL range.
Here, how to determine the velocity VEL range and the number of the ranges are arbitrary. In the illustrated example, the velocity VEL is divided into three ranges (large, medium, and small).

In this embodiment, when a key-on signal for instructing sound generation is input, and the tone color set for the current tone generation is a predetermined tone color, the note number NN of the tone generation for which the predetermined tone color was last set is used. The velocity VEL range is compared with the note number and velocity VEL range of the current pronunciation.
As a result of the comparison, if either one of the note number NN or the velocity VEL range does not match, within the waveform data set instructed corresponding to the predetermined tone set for the current pronunciation, Specify the waveform data corresponding to the range of velocity VEL and the note range NN of the current pronunciation.
In this case, even if the designated waveform data set is not switched, since either the note number NN or the velocity VEL range is different, an unnatural sound is not produced.

On the other hand, when both the note number NN and the velocity VEL range coincide with each other, a waveform data set different from the waveform data set instructed for the pronunciation in which the predetermined tone color is set last is designated. Next, in the instructed waveform data set, the waveform data corresponding to the range to which the note number NN of the current pronunciation belongs and the range of the velocity VEL is designated as the waveform data used for the current pronunciation.
Therefore, the waveform data different from the waveform data used for the sound generation in which the predetermined tone color was set last is designated as the waveform data used for the current sound generation.

In this embodiment, when a key-on signal for instructing sound generation is input and the tone color set for the current tone generation is a predetermined tone color, the note number of the tone that was set last for the predetermined tone color is used. Only the note number NN of the current pronunciation may be compared, and the comparison of the velocity VEL range may be omitted.
As a result of the comparison, when the note numbers NN do not match, it is instructed by the key-on signal input this time within the waveform data set instructed corresponding to the predetermined tone set for the current sound generation. Specifies the waveform data corresponding to the range of velocity VEL to which the note number NN of the sound belongs.
On the other hand, when the note numbers NN coincide with each other, a waveform data set different from the waveform data set instructed for the sound generation in which the predetermined tone color is set last is designated. Next, in the instructed waveform data set, the waveform data corresponding to the range to which the note number NN of the current pronunciation belongs and the range of the velocity VEL are designated as the waveform data used for the current pronunciation.

As a method of instructing different waveform data every time the range of the note number NN or the note number NN and the velocity VEL coincides with each other under the comparison conditions described above, as in the embodiment described with reference to FIG. Various methods can be employed.
In the above description, the entire waveform data set is instructed to be switched at once, and then the waveform data to be used for the current sound generation is instructed. After that, until the entire waveform data set is instructed to be switched at once, the waveform data set instructed by the current sound generation is also used when sounding in the same tone and different note number NN or different velocity VEL range. The included waveform data will be used.
Instead, as in the embodiment described with reference to FIG. 1, only the waveform data corresponding to the note range NN of the current pronunciation and / or the velocity VEL range may be switched. . In this case, even for the same timbre, the waveform data set including the waveform data to be used differs depending on the sound range and / or the velocity VEL range. For this reason, it is necessary to store in the memory information for specifying the instructed waveform data set for each tone range and / or velocity VEL range in which a predetermined tone color was last set.

FIG. 3 is a hardware configuration diagram illustrating an example of an electronic music apparatus that implements an embodiment of the present invention.
In the figure, 1 is a bus, 2 is a CPU (Central Processing Unit), 3 is a RAM (Random Access Memory), and 4 is a ROM (Read Only Memory).
The ROM 4 stores a control program for operating the CPU 2, setting data, and the like. The ROM 4 is preferably a rewritable nonvolatile memory such as a flash memory.
Reference numeral 5 denotes an operator such as a keyboard or a setting operator. Reference numeral 6 denotes a detection circuit for detecting an operation. Reference numeral 7 denotes a display unit such as a liquid crystal display. Reference numeral 8 denotes a display circuit.

Reference numeral 9 denotes an external device, for example, a MIDI (Musical Instrument Digital Interface) keyboard. An external device 9 connected to the apparatus via a MIDI cable, RS232C, USB (Universal Serial Bus) or the like outputs performance data to the apparatus or inputs performance data from the apparatus. Reference numeral 10 denotes a communication interface.
Reference numeral 11 denotes a sound source unit. The sound source unit 11 includes, for example, a sound source dedicated integrated circuit (sound source LSI: Large Scale Integrated Circuit) having a sound generation processing function and a waveform ROM for storing sound source waveform data. Waveform data is supplied to the tone generator LSI via the waveform memory bus.
The waveform ROM stores a plurality of different waveform data for one or a plurality of predetermined timbres, as shown in FIGS.
Reference numeral 12 denotes an effector. Effects such as reverberation and distortion are added to the musical sound signal generated by the sound source unit 11.

The RAM 3 is loaded with a processing program. The CPU 2 performs general control such as operation event detection of the operator 5 and display control for the display unit 7 in accordance with this processing program.
The operation of the timbre SW included in the operator 5 is detected by the detection circuit 6 and is input to the RAM 3 as a timbre designation signal. The operation of the keyboard included in the operator 5 is also detected by the detection circuit 6 and is input to the RAM 3 as a key-on signal.
The CPU 2 executes processing for determining the waveform data for sound source of the above-described embodiment based on the tone color designation signal and the key-on signal, creates a sound source parameter (control parameter) in accordance with this determination, and sends it to the sound source unit 11. Output.
The sound source unit 11 reads out waveform data from the waveform ROM in the sound source unit 11 storing the waveform data set described with reference to FIGS. 1 and 2 according to the control parameters, and processes the waveform data to process musical tone waveform data. Is synthesized.
The synthesized musical sound waveform data is given an effect by the effector 12, converted into an analog signal by a CODEC (coder / decoder) (not shown), and output from the sound system 13.

When performing with a MIDI keyboard which is a kind of external device 9, a MIDI message is received as performance data. When a “note-on message” is received among the MIDI messages, it is input to the RAM 3 as a key-on signal.
The tone is determined by the MIDI channel (MIDI channel) included in the “Note On Message”. A predetermined tone color is set in advance in the MIDI channel by a setting operator included in the operator 5 or a predetermined tone color is set by a “program change message” included in the performance data.
Further, when reproducing automatic performance data (music data file) stored in the ROM 4 or music data installed in an external storage device (hard magnetic disk device) (not shown), the music data file is loaded into the RAM 3, The “note-on message” read from the music data file according to the performance timing is used as a key-on signal. The tone is determined by the MIDI channel included in this key-on signal. In many cases, a plurality of MIDI channel key-on signals are read from a song data file. For each MIDI channel, a predetermined tone is designated by a “program change message” read from the song data file.

When the control program and setting data are not stored in the ROM 4, a hard magnetic disk device that stores them is provided, or an external storage device that reads a CD-ROM storing these is provided, and these are read into the RAM 3. But you can.
In addition, a control computer and setting data may be downloaded from the RAM 3 or the rewritable ROM 4 by connecting to a server computer via a communication network.
The illustrated electronic music apparatus includes the sound source unit 11 and the effector 12. However, instead of including the sound source unit 11 and the effector 12, the CPU 2 can implement a sound source function and an effect providing function by executing a software sound source program. In this case, a part of the ROM 4 may be a waveform ROM, the waveform ROM may be connected to the bus 1, or a waveform data set may be stored in a hard magnetic disk device (not shown).
Also, even a general-purpose personal computer or other electronic device such as a mobile phone device can provide a sound source function and an effect providing function if it has a sound source unit or the CPU executes a software sound source program. be able to.
Instead of the CPU 2, the sound generation processing unit (sound source LSI) in the sound source unit 11 may execute the process of determining the sound source waveform data in the above-described embodiment. In this case, the key-on signal is input to the sound generation processing unit in the form of a control parameter corresponding to the key-on signal.

FIG. 4 is a flowchart for explaining an operation example of one embodiment of the present invention.
The flowchart shown in FIG. 3 explains processing realized by the CPU 2 in FIG. 3 executing a sound source waveform data determination program. This program is executed, for example, as a part of a control program for an electronic music apparatus using a waveform memory sound source method.
In order to make the explanation easy to understand, a case will be described in which when the waveform data shown in FIG. 1 is used, a key is pressed on the MIDI keyboard, and a “note on message” is input as a key on signal.
This key-on signal includes MIDI channel, note number NN, and velocity VEL data.

The tone color of the musical sound to be generated by the tone generator 11 by the key-on signal can be determined by identifying the MIDI channel. There are cases where a plurality of musical tones are played at the same time as a plurality of natural musical instruments are played. In such a case, the MIDI channel included in the key-on signal differs depending on each tone.
Data indicating whether or not to indicate different waveform data by switching the waveform data set to be instructed when a predetermined condition is satisfied (hereinafter referred to as a switching flag) is set and stored for each tone at the time of factory shipment. Has been.
As shown in FIG. 1, a plurality of different waveform data sets A, B, C,... Are stored for the timbre for which the switching flag is set.

This flowchart is activated by detecting a new key-on signal (referred to as a current key-on signal).
In S21, it is determined whether or not it is necessary to determine the switching of the designated waveform data set. More specifically, it is determined whether or not the above-described switching flag is set for the tone generated by the current key-on signal. If the timbre has a switch flag set, the process proceeds to S22, and if the timbre does not have a switch flag set, the process proceeds to S23.

In S22, the note number NN of the pronunciation in which the predetermined timbre set in the current pronunciation is set last is read from the RAM 3, and the process proceeds to S24.
In S24, the note number NN of the pronunciation that was set last for the predetermined tone color is compared with the note number NN of the current pronunciation to determine whether or not they are the same. As a result, the continuity of the note number NN is determined for each tone color. If they are the same, the process further proceeds to S25, and if they are different, the process proceeds to S23.

In S25, the waveform data set designated in accordance with the predetermined tone color for the predetermined tone color set for the current pronunciation is changed to a different waveform data set corresponding to the same predetermined tone color. Switch.
For example, in FIG. 1, if the waveform data set A is instructed for the sound generation for which the predetermined tone color was set last, the switching to the waveform data set B is instructed this time, and the process proceeds to S23.

In S23, sound generation based on the current key-on signal is performed using the waveform data corresponding to the range of the current sound generation included in the waveform data set that has been instructed to be switched this time or has already been instructed.
This processing step is executed by the CPU 2 when a musical tone signal is generated by a software tone generator program. However, in the hardware configuration shown in FIG. 4, the sound generation processing unit (sound source LSI) in the sound source unit 11 executes.
In S26, the note number NN of the current pronunciation is stored in the RAM 3 as the note number of the pronunciation in which the predetermined timbre set for the current pronunciation was last set.
Note that information specifying the instructed waveform data set is stored in the RAM 3 in S25 or S26, for example.

In the above description, the timbre used to generate the key-on signal can be generally identified by identifying only the MIDI channel included in the key-on signal. This is because different timbres are generally assigned to different MIDI channels.
However, the same tone may be set even if the MIDI channels are different. In this case, even if the performance is performed individually for each MIDI channel, what is heard is a composite waveform of a musical sound signal that is generated according to the key-on signal of each MIDI channel.
Therefore, if the tone is the same even if the MIDI channels are different, those MIDI channels are treated as the same tone.

In the description with reference to FIG. 4, the processing executed when “note-on data” corresponding to the key-on signal transferred from the MIDI keyboard is input has been described.
However, the above-described key-on signal may be obtained by playing a keyboard of an electronic music device, or obtained as performance data from a keyboard of an external device, or performance data read from a song data file stored in a storage device It may be obtained as
In the description of the embodiment described above, when the note numbers completely match, the waveform data different from the waveform data used for the sound generation in which the predetermined tone color was set last is used as the waveform data used for the current sound generation. I was instructing.
However, even when the note number difference is within the allowable range, the above-described instruction may be given assuming that the note numbers match. Here, the difference between the note numbers is within the allowable range. For example, if the allowable range is ± 2 (± whole sound), when one note number is 60, the other note number is 58, 59, 60, 61, This is the case of 62.
Therefore, the note number coincidence is not limited to the case where the note number is completely coincident, but includes the case where the difference between the note numbers is within an allowable range.

In the description with reference to FIGS. 1 and 2, the waveform data stored in the sound source waveform storage unit is assumed to be all waveform data for one sound generation from the start of sound generation to the end of sound generation, including the amplitude envelope. did.
Instead of such all waveform data, for example, the waveform data of the attack portion at the start of sound generation and the waveform data of the loop portion may be stored. The waveform data of the loop part is used repeatedly. The volume envelope may be formed in the volume envelope generator 40 and the multiplier 38 as in the prior art shown in FIG.
Therefore, as the waveform data to be made different according to the waveform data sets A, B, C..., Both the waveform data of the attack part and the waveform data of the loop part, and the waveform data of the attack part and the loop part of the loop part are described. Only one of the waveform data may be varied.

It is explanatory drawing which shows the 1st example of the waveform data used in one Embodiment of this invention. It is explanatory drawing which shows the 2nd example of the waveform data used in embodiment of this invention. It is a hardware block diagram which shows an example of the electronic music apparatus which implement | achieves one Embodiment of this invention. It is a flowchart explaining the operation example of one Embodiment of this invention. It is a functional block diagram which shows an example of the conventional electronic music apparatus using a waveform memory sound source system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bus, 2 ... CPU, 3 ... RAM, 4 ... ROM, 5 ... Keyboard, setting operators, etc., 9 ... External devices, such as a MIDI keyboard, 11 ... Sound source part

Claims (2)

A plurality of different waveform data corresponding to a predetermined tone color in order to generate a musical sound signal is stored in a storage device, and waveform data for sound source that determines waveform data to be used from among the plurality of different waveform data A determination device of
A plurality of different waveform data corresponding to the predetermined tone color is stored as a plurality of different waveform data sets in which the whole tone range is one set,
When a key-on signal for instructing pronunciation is input and the timbre set for the current utterance is the predetermined timbre, the note number of the utterance for which the predetermined timbre was set last and the note for the current utterance Note number comparison means for comparing numbers,
Waveform data included in a waveform data set different from the waveform data set including the waveform data used for the sound generation in which the predetermined tone color was last set when the note number comparison means detects a match between both note numbers As the waveform data used for the current pronunciation , and
When the note number comparison means detects a mismatch between both note numbers, the waveform data included in the same waveform data set as the waveform data set including the waveform data used for the sound generation in which the predetermined tone color was set last is , Waveform data instruction means for instructing as waveform data used for the current sound generation ,
An apparatus for determining waveform data for a sound source, comprising: A plurality of different waveform data corresponding to a predetermined tone color is stored in a storage device in order to generate a musical tone signal, and a process for determining waveform data to be used from the plurality of different waveform data is processed in a computer. A sound source waveform data determination program to be executed,
A plurality of different waveform data corresponding to the predetermined tone color is stored as a plurality of different waveform data sets in which the whole tone range is one set,
When a key-on signal for instructing pronunciation is input and the timbre set for the current utterance is the predetermined timbre, the note number of the utterance for which the predetermined timbre was set last and the note for the current utterance Note number comparison step for comparing numbers,
Waveform data included in a waveform data set different from the waveform data set including the waveform data used for the sound generation in which the predetermined tone color was last set when the coincidence of both note numbers is detected in the note number comparison step As the waveform data used for the current pronunciation , and
When the note number comparison means detects a mismatch between both note numbers, the waveform data included in the same waveform data set as the waveform data set including the waveform data used for the sound generation in which the predetermined tone color was set last is , Waveform data instruction step to instruct as waveform data to be used for the current pronunciation ,
A program for determining waveform data for a sound source, comprising:

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