JPH05165477A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To change tone quality according to a performing method such as melody execution of code execution in the electronic musical instrument in a plural channel synthesizing/waveform reading system. CONSTITUTION:A keying number count part 109 always counts the number of times for keying within time. A control part 102 instructs a reading part 105 to read the waveform data of a waveform storage part 103 for all the times for keying and on the other hand, the waveform data of a waveform storage part 104 are not read unless the number of times for keying within the unit time exceeds a fixed value. Thus, in the case of the melody rendition, the tone quality of only the waveform storage part 103 is generated and in the case of the code execution, that of the waveform storage part 104 is mixed. Therefore, the musical expressivity of the electronic musical instrument is improved.

Description

Detailed Description of the Invention

[0001]

The present invention relates to multi-channel synthesis / multi-channel synthesis.
The present invention relates to a waveform readout type electronic musical instrument.

[0002]

2. Description of the Related Art In recent years, electronic musical instruments have been digitized with the progress of computer technology. Among them, a large number of electronic musical instruments of a so-called waveform reading system, in which a musical tone waveform is stored in advance in a memory as PCM data and a reading musical tone is generated in response to a key depression, have been commercialized.
Further, among them, some so-called multi-channel synthesis type electronic musical instruments have been proposed in which one musical sound is separated into several components, stored in a memory, and synthesized at the time of sound generation. (For example, Japanese Laid-Open Patent Publication No. 1-116595) A conventional electronic musical instrument will be described below.

FIG. 4 shows the structure of a conventional electronic musical instrument. In FIG. 4, 1 is a keyboard, 2 is a control unit that generates a control signal according to the keyboard 1, 3 and 4 are waveform storage units that store waveforms of different shapes, and 5 is a control unit 2. A reading unit for simultaneously reading waveforms from the waveform storage units 3 and 4 according to a control signal, and 6 for controlling amplitudes of two waveform signals output from the reading unit 5 according to a control signal generated from the control unit 2. Amplitude control unit, 7 is an addition unit,
Reference numeral 8 is a sound system that amplifies an input signal and outputs the sound.

The operation of the electronic musical instrument constructed as described above will be described below. When a key is pressed on the keyboard 1, the control unit 2 detects a key press, and the reading unit 5 and the amplitude control unit 6 are detected based on the pitch and touch strength detection information.
Control signal is output to. The reading unit 5 simultaneously reads the waveforms from the waveform storage units 3 and 4 according to the control signal generated by the control unit 2. The output waveform signal has its amplitude controlled by the amplitude control unit 6 in accordance with the control signal generated from the control unit 2, added by the addition unit 7, amplified by the sound system 8 and emitted as a musical sound.

The control signal sent to the amplitude control section 6 is
It corresponds to pitch and touch strength. The amplitudes of the two waveform signals read from the waveform storage units 3 and 4 are respectively controlled here according to the pitch and the touch intensity. That is, the volume levels of the two waveform signals are controlled according to the pitch and the touch strength, and the tone color can be changed according to the strength of the touch, for example.

[0006]

However, in the above-mentioned conventional structure, although the tone color can be changed by the pitch and the strength of the touch, the tone color can be changed by a so-called musical playing method such as a melody playing method and a chord playing method. It had a problem that it could not be done.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an electronic musical instrument capable of automatically discriminating between a melody playing style and a chord playing style and changing a tone color according to the playing style.

[0008]

In order to achieve this object, the electronic musical instrument of the present invention is provided with a plurality of waveform storage sections each storing a waveform of a different shape and the number of keys pressed in a unit time. The key pressing number counting unit for counting and the reading unit for controlling the reading from each of the waveform storage units according to the count data of the key pressing number counting unit are provided.

[0009]

With this configuration, the tone color can be changed depending on the playing condition by detecting the number of keys pressed in a unit time and controlling the reading of at least one waveform signal according to the detected value.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of an electronic musical instrument according to an embodiment of the present invention. In FIG. 1, 101 is a keyboard and 109
Is a key-depression number counting section for counting the number of key-depressions per unit time, and includes a timer counter for measuring the unit time and a key-depression number memory. 102 is the keyboard 101 and the number of keys pressed
A control unit that generates a control signal according to the count data in the memory for the number of depressed keys 109, 103 and 104 are waveform storage units that store waveforms of different shapes, and 105 is a control signal that is generated from the control unit 102. A reading unit that reads out waveforms from the waveform storage units 103 and 104 according to the above, and an amplitude control unit 106 that controls the amplitudes of the two waveform signals output from the reading unit 105 according to the control signal generated from the control unit 102. , 107 is an adder, and 108 is a sound system that amplifies an input signal and outputs a sound.

Table 1 shows a key-depression number pronunciation instruction table included in the control unit 102.

[0013]

[Table 1]

In Table 1, R1 is an instruction flag indicating whether to read a waveform from the waveform storage unit 103, and R2 is an instruction flag indicating whether to read a waveform from the waveform storage unit 104. In both cases, 1 means that the waveform is read, and 0 means that the waveform is not read.

The operation of the electronic musical instrument constructed as described above will be described below. When the first key depression is performed on the keyboard 101, the key depression number counting unit 109 resets the timer counter and simultaneously writes 1 in the key depression number memory. The control unit 102 outputs a control signal to the amplitude control unit 106 on the basis of the pitch and touch strength detection information at the timing of key depression, and the value of the key depression number memory of the key depression number counting unit 109 (= 1. ), The tone generation instructions R1 (= 1) and R2 (= 0) are obtained in the key depression number tone generation instruction table shown in (Table 1), and a control signal is output to the reading unit 105. Readout section 1
Reference numeral 05 simultaneously reads out waveforms from the waveform storage units 103 and 104 according to a control signal generated from the control unit 102. (In this case, the waveform is read from the waveform storage unit 103, but the waveform is not read from the waveform storage unit 104.) The output waveform signal is controlled by the amplitude control unit 106 from the control unit 102. Amplitude is controlled according to the signal and added by the adder 107,
It is amplified by the sound system 108 and emitted as a musical sound.

When the keyboard 101 is pressed for the second time, the number-of-keys-counting unit 109 refers to the value of the timer counter,
The unit time T set in advance is compared. When the value of the timer counter is larger than the unit time T,
The timer counter is reset and the number of keys pressed is counted 109
Write 1 to the number of keys pressed. Control unit 102, reading unit 10
5. The operations of the amplitude control unit 106, the addition unit 107, and the sound system 108 are the same as those in the case of the first key depression.

When the value of the timer counter is equal to or less than the unit time T in the second key depression, the key depression number counting unit 109 does nothing to the timer counter and increments the value of the key depression number memory by one. (That is, in the present case, the value of the number-of-keys-depression memory is 2.) The control unit 102 outputs a control signal to the amplitude control unit 106 based on the pitch and touch strength detection information at the timing of key depression. At the same time, the value (= 2) of the key press number memory of the key press number counting unit 109 is referred to, and the tone generation instructions R1 (= 1) and R2 are generated in the key depression number pronunciation instruction table shown in (Table 1).
(= 0) is obtained and a control signal is output to the reading unit 105.
The subsequent operation is the same as in the case of the first key depression.

The third and subsequent key depressions are the same as the second key depression. The unit time T is set to a value for identifying a chord playing style and a melody playing style as described below. As used herein, the chord playing style is a playing style in which a plurality of keys are pressed at substantially the same time or dispersed in a short time, as shown in FIG. As shown in FIG. 3, the melody playing method is a playing method in which a single key is distributed over a relatively long time and pressed. 1
When the time from the first key depression to the last key depression of the chord playing method is Tc and the time between two key depressions of the melody playing method is Tm, the unit time T is set to satisfy the following (Equation 1). To do.

[0019]

[Equation 1]

As described above, according to this embodiment, (Equation 1)
By counting the number of key depressions within the unit time T set to satisfy the above condition and controlling the reading of the waveform based on the information, it is possible to change the tone color between the chord playing style and the melody playing style. For example, when the chord playing method shown in FIG. 2 is performed, one waveform signal (the waveform signal read from the waveform storage unit 104) is read as the third note. However, it is not read in the case of the melody playing method shown in FIG. For example, the guitar waveform is stored in the waveform storage unit 103,
If the waveform of picking noise (noise generated when the pick and the string hit each other) is stored in the waveform storage unit 104, the picking noise will be generated only during the chord playing method, and a very effective performance can be performed.

Further, the present embodiment is effective from the viewpoint of effective use of channels when a plurality of sounds are produced. In this embodiment, two waveforms are combined to make one sound.
In such a case, two channels are usually required for one sound. Therefore, when the system has 32 channels, the maximum polyphony is 16 tones. However, in the case of the chord playing method of the present embodiment, all channels except for the third note are sounded in one channel, and the maximum number of sounds is 31.

In the present embodiment, the waveform storage unit 104 is stored by the key depression number pronunciation instruction table (Table 1) included in the control unit 102.
Although it is controlled whether to read or not read the waveform of, the configuration may be such that one of the waveform storage units 103 and 104 is selected depending on the number of key presses. In this configuration, the waveform is read from the waveform storage unit 104 only for the third key press, and is read from the waveform storage unit 103 in other cases, and the picking noise and the guitar waveform are previously stored in the waveform storage unit 104. If synthesized and stored (that is, if the synthesized waveform of the waveform storage units 103 and 104 in the embodiment is stored in the waveform storage unit 104 in advance), the same effect can be obtained.

Further, in the present embodiment, the case where one sound is synthesized by two waveform signals is shown, but the same is true when one sound is synthesized by three or more waveform signals. In this case, a wider variety of musical performance expressions are possible.

In the present embodiment, the control unit 102 reads the waveforms from the waveform storage units 103 and 104 at the same time, but "simultaneous" in this case means "substantially simultaneous" by time division processing. It goes without saying that you are out.

Further, in this embodiment, "the timer counter is reset" at the time of the first key depression or melody playing.
However, a memory for storing the timer counter value is provided, and instead of resetting, the value of the timer counter at that time is written to that memory, and at the timing of the next key depression, the value of the timer counter and the value of the memory You may check the difference with. In this case, there is an advantage that the timer counter can be used jointly with other processing.

[0026]

As described above, according to the present invention, a plurality of waveform storage sections each storing a waveform of a different shape, a key press number counting section for counting the number of key presses in a unit time, and each of the above By providing the reading unit that controls the reading from the waveform storage unit according to the count data of the key pressing number counting unit, the melody playing style and the chord playing style can be automatically identified, and the timbre can be changed according to the playing style. It has an excellent effect that it can be done.

Further, there is an excellent effect that many sounds can be produced with a small number of channels.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a chord playing method according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram of a melody playing method according to an embodiment of the present invention.

FIG. 4 is a block diagram of a conventional electronic musical instrument.

[Explanation of symbols]

 101 keyboard 102 control unit 103/104 waveform storage unit 105 reading unit 106 amplitude control unit 107 adder unit 108 sound system 109 key press count unit

Claims (3)

[Claims] 1. A plurality of waveform storage units each storing a waveform of a different shape, a key press number counting unit for counting the number of key presses in a unit time, and reading from each of the waveform storage units. An electronic musical instrument having a reading unit that controls according to the count data of the key-pressing number counting unit. 2. The electronic musical instrument according to claim 1, wherein the reading unit controls whether or not to read from at least one of the plurality of waveform storage units according to the count data of the key pressing number counting unit. 3. The electronic musical instrument according to claim 1, wherein the reading section selects the plurality of waveform storage sections in accordance with count data of the key pressing number counting section.