JP3578891B2 - Electronic musical instrument - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic musical instrument capable of providing a sense of spaciousness when a piano tone or the like is reproduced by a stereo sampling method.
[0002]
[Prior art]
For electronic pianos and the like, a stereo sampling system has been developed and used. This means that when the sounding body is large, such as a piano sound, or for sounds with a sense of realism, such as strings, the sound is recorded in LR stereo, and the data of both channels is sampled and stored as data. By reading and reproducing the data, the original sound is reproduced in a sense of spaciousness and presence.
[0003]
[Problems to be solved by the invention]
Assuming an actual piano or the like, the sense of spaciousness of the sound depends on the strength of the touch on the keyboard. However, in such an electronic musical instrument, it is necessary to have waveform data according to the strength in order to give a different sense of spread according to the strength of the touch, and a huge memory capacity is required.
[0004]
Therefore, the present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide an electronic musical instrument which can provide a feeling of sound spread according to a touch without increasing a memory capacity.
[0005]
[Means for Solving the Problems]
The configuration of the electronic musical instrument according to the present invention includes a musical tone generating means for generating musical tones, a gamut / touch information detecting means for detecting gamut information and touch information, and velocity curves for an L channel waveform and an R channel waveform for each gamut. The velocity curve for the R channel waveform is set to be smaller than the velocity curve for the L channel waveform as the touch becomes smaller on the lower frequency range, and the touch becomes smaller on the higher frequency range. Accordingly, the velocity curve for the L-channel waveform is set to be smaller than the velocity curve for the R-channel waveform, and based on the range information and the touch information detected by the range / touch information detecting means. Read the velocity curve data from the velocity curve storage means It is basically characterized in that it has a velocity control means for velocity control of the musical tone generated by the musical tone generating means by Les.
For example, when recording the sound in the low frequency range of a piano in stereo and playing it back on an electronic musical instrument, since the low frequency string of the piano is located on the left side, the main component of the sound is often included in the L side signal and the R side signal is large. Contains mainly a spread component. The opposite is true for high-pitched sounds. Therefore, the "velocity curve" representing the relationship between the playing strength (velocity) of the keyboard and the sound level of the sound is divided into two types, one for the L-channel waveform and the other for the R-channel waveform. The velocity curve is stored in the velocity curve storage means. At this time, the velocity curve for the R-channel waveform is made smaller than the velocity curve for the L-channel waveform as the touch becomes smaller on the lower frequency range, and L as the touch becomes smaller on the higher frequency range. The velocity curve for the channel waveform is made smaller than the velocity curve for the R channel waveform, and these velocity curves are stored in the velocity curve storage means. Then, the velocity control means reads the velocity curve data from the velocity curve storage means on the basis of the range information and the touch information detected by the range / touch information detection means, and thereby the velocity of the tone generated by the tone generation means. If the control is performed, when the touch is weak, the main component of the sound is mainly played and the spreading component is not played much for both the low range sound and the high range sound, so a large feeling of spread can be obtained. However, when the touch is increased, the sound of the R component on the low frequency side and the sound of the L component on the high frequency side become louder, and it is possible to obtain a large spread feeling as if the entire piano is sounding. Therefore, it is not necessary to have waveform data corresponding to the strength, and the memory capacity can be saved.
[0006]
The above-described configuration is a configuration for performing a musical instrument in real time. However, when musical tone information and the like are stored in some data storage means and applied to a configuration for reproducing a musical tone based on the information, the range and touch Instead of the information detecting means, a new tone information storing means for storing tone information including the tone range information and the touch information is newly provided, and the velocity control means stores the tone range information and the touch information stored in the tone information storing means as another tone information. The tone curve information is read together with the tone information, and the velocity curve data is read from the velocity curve storage means on the basis of the tone range information and the touch information, whereby the velocity control of the tone generated by the tone generating means is performed. .
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 3 show the configuration of an embodiment of the present invention applied to a general electronic musical instrument. FIG. 1 is a block diagram showing the configuration of the electronic musical instrument. FIG. 2 is a functional block diagram of the tone control unit 2 to which the configuration of claim 1 of the present invention is applied. Here, the description will be limited to piano tones.
[0008]
As shown in FIG. 1, in the configuration of the electronic musical instrument, a keyboard unit 101 having a configuration of a range / touch information detecting unit 1 described later, a panel switch 102a, and various states of the electronic musical instrument are displayed on a bus line 100. And a control unit 103 having a CPU 103a, a ROM 103b, and a RAM 103c for controlling the entire configuration and storing necessary programs, storing programs, and storing, rewriting, and reading data, and a musical tone to be described later. The control unit 2 is provided, and further connected to digital-to-analog converters (DACs) 104a and 104b, sound systems 104c and 104d forming an amplifier, and a sound generating unit 104 having speakers 104e and 104f.
[0009]
The configuration of the present invention comprises a tone range / touch information detecting means 1 of a keyboard section 101 and a musical tone control section 2 of a sound generating section 104, and FIG. 2 shows a functional block configuration of the musical tone control section 2 among them. The musical tone control unit 2 includes musical tone generating means 20 for generating musical tones, velocity curve storing means 21a and 21b for storing velocity curves for an L channel waveform and an R channel waveform for each tone range, and the tone range / touch information detection. A velocity control means 22 for reading out velocity curve data from the velocity curve storage means 21a and 21b based on the tone range information and the touch information detected by the means 1 and thereby controlling the velocity of the tone generated by the tone generating means 20; Have.
[0010]
Among them, the range / touch information detecting means 1 detects range information determined by key-on / off of an arbitrary key of the keyboard unit 101, and the keyboard unit 101 has a touch sensing configuration, thereby detecting touch information. This is detected and sent as velocity information to a velocity control means 22, which will be described later, together with the sound range information.
[0011]
The tone generator 20 includes L & R channel waveform memories 20a and 20b, L & R channel filters 20c and 20d, and L & R channel parameter generators 20e and 20f. In the waveform memories 20a and 20b, those for various musical instrument sounds are specified based on the timbre information specified by the panel switch 102a of the operation unit 102. In this configuration, a stereo-sampled piano waveform is one of them. Is stored. The address from which the memory is read is determined by the timbre information selected by the panel switch 102a and the gamut information detected by the keyboard unit 101. The filters 20c and 20 are digital filters for adding a sound quality change due to velocity or a sound quality change over time to the read waveform. Further, the parameter generators 20e and 20f are circuits for generating parameters such as cutoff frequencies to be applied to the filters 20c and 20d, and these parameters are determined by the timbre information, the gamut information, and the velocity information (touch information). You.
[0012]
The velocity curve storage means 21a to 21b divides the velocity curve representing the relationship between the playing strength (velocity) of the keyboard and the level of the sound to be generated into two types, one for the L channel waveform and the other for the R channel waveform. It is stored as a velocity curve table for the low range, the middle range, and the high range. As shown in FIG. 3A, the table is set such that the velocity curve for the R-channel waveform becomes smaller than the velocity curve for the L-channel waveform as the touch becomes smaller on the low-tone side. In addition, as shown in FIG. 3B, both velocity curves draw the same curve curve in the middle frequency range, and further, as shown in FIG. , The velocity curve for the L channel waveform is set to be smaller than the velocity curve for the R channel waveform, and stored.
[0013]
The velocity control means 22 inputs the gamut information and the touch information (other timbre information) detected by the gamut / touch information detecting means 1, and stores the velocity curve data in the velocity curve storage means 21a and 21b based on the information. A selection circuit 22a for selecting and setting the level to be the level of the sound to be sounded (selecting a corresponding value of the velocity curve); and a selection circuit for the tone signal generated by the tone generator 20 Multiplication circuits 22b and 22c for multiplying the corresponding value of the velocity curve set in 22a.
[0014]
Next, a method of using the present configuration will be described. First, a player of this electronic musical instrument determines a desired tone using the panel switch 102a. This timbre information is used for selecting the waveform memories 20a and 20b of the musical tone generating means 20, and a waveform memory storing, for example, the timbre of a piano is selected. In this state, when the user plays the keyboard of the keyboard unit 101, the keyboard unit 101 detects the range information and velocity information, and the range information is sent to the waveform memories 20a and 20b, where the waveform memory address is specified and the specified Is read out. On the other hand, the timbre information, the tone range information and the velocity information detected as described above are sent to parameter generators 20e and 20f, where parameters such as cutoff frequencies to be applied to the filters 20c and 20d are generated. Based on this, the filters 20c and 20d cut off the frequency designated by the above-mentioned parameters for the tone signals read from the waveform memories 20a and 20b. The timbre information, the tone range information, and the velocity information are input to the selection circuit 22a of the velocity control means 22, and the velocity curve data in the velocity curve storage means 21a and 21b is selected based on the information, and generated by the musical sound generation means 20. The multiplied circuits 22b and 22c multiply the obtained tone signal by a corresponding value of the velocity curve so as to obtain a corresponding sounding level. This configuration further includes L & R envelope generators 23a and 23b, and multiplication circuits 23c and 23d for multiplying the tone signal by the envelope. The timbre information and the gamut information are input to the envelope generators 23a and 23b. Based on this, a predetermined envelope is added to the tone signal by the multiplying circuits 23c and 23d. The tone signals thus processed are converted into analog signals by the DACs 104a and 104b, amplified by the sound systems 104c and 104d, and output from the speakers 104e and 104f.
[0015]
In the above configuration, when the touch is weak, the main component of the sound is mainly reproduced and the spread component is not reproduced much for both the low-range sound and the high-range sound, so that a large spread feeling cannot be obtained. When is increased, the sound of the R component in the low-frequency range and the L component in the high-frequency range become louder, and it is possible to obtain a large spread feeling as if the entire piano is sounding.
[0016]
FIG. 4 shows another embodiment of the configuration of the present invention, wherein the corresponding value of the velocity curve selected by the selection circuit 22a is multiplied by the loudness of the envelope generators 23a and 23b, The other configuration is the same as the configuration of the above-described embodiment, and thus the details are omitted.
[0017]
【The invention's effect】
According to the configuration of the electronic musical instrument of the present invention described in detail above, it is possible to obtain a feeling of sound spread according to a touch without increasing the memory capacity.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of an electronic musical instrument to which an embodiment of the present invention has been applied.
FIG. 2 is a functional block diagram of a tone control unit to which the configuration of the present invention is applied.
FIG. 3 is a graph showing a storage state of a velocity curve table stored in a velocity curve storage unit.
FIG. 4 is a functional block diagram of a tone control unit showing another embodiment of the present invention;
[Explanation of symbols]
1 Tone range / touch information detection means 2 Music sound control unit 20 Music sound generation means 20a, 20b Waveform memories 20c, 20d Filters 20e, 20f Parameter generators 21a, 21b Velocity curve storage means 22 Velocity control means 22a Selection circuits 22b, 22c, 23c, 23d Multiplication circuits 23a, 23b Envelope generator 100 Bus line 101 Keyboard 102 Operation unit 102a Panel switch 102b Display unit 103 Control unit 103a CPU
103b ROM
103c RAM
104 sound generators 104a, 104b digital-analog converters 104c, 104d sound systems 104e, 104f speakers

Claims (2)

A tone generating means for generating a tone, a tone / touch information detecting means for detecting tone range information and touch information, and velocity curves for an L channel waveform and an R channel waveform are stored for each tone range. Becomes smaller, the velocity curve for the R channel waveform is set to be smaller than the velocity curve for the L channel waveform, and the velocity curve for the L channel waveform becomes smaller as the touch becomes smaller toward the higher frequency range. Velocity curve data from the velocity curve storage means set to be smaller than the velocity curve for the R channel waveform, and velocity curve storage means based on the range information and touch information detected by the range / touch information detection means. Read out and thereby generated by the tone generator Electronic musical instrument and having a velocity control unit for performing velocity control of the musical tone was. Tone information storage means for storing tone information including tone range information and touch information, tone tone generating means for generating tone, and velocity curves for L channel waveform and R channel waveform are stored for each tone range. The velocity curve for the R-channel waveform is set to be smaller than the velocity curve for the L-channel waveform as the touch becomes smaller, and the velocity curve for the L-channel waveform becomes smaller as the touch becomes smaller on the higher frequency side. A velocity curve storage unit that is set so that the curve is smaller than a velocity curve for the R channel waveform; and a range information and a touch information stored in the tone information storage unit are read out together with other tone information, and the range information and the tone range information are read. The velocity curve is stored from the velocity curve storage means based on the touch information. Reads Budeta, whereby the electronic musical instrument characterized by having a velocity control unit for performing velocity control of the musical tone generated by the tone generation means.

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