JP2932676B2 - Electronic musical instrument - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument of a multi-channel synthesis / waveform reading system.

2. Description of the Related Art In recent years, digitization of electronic musical instruments has been progressing with the progress of computer technology. Among them, a large number of so-called waveform reading type electronic musical instruments in which musical sound waveforms are stored in advance as PCM data in a memory and read out in response to key depression to generate musical tones have been commercialized. Among them, several electronic musical instruments of a so-called multi-channel synthesizing method have been proposed in which one musical tone is divided into several components, stored in a memory, and synthesized at the time of sound generation (for example, Japanese Unexamined Patent Publication No. Hei. No. 116595).

 Hereinafter, a conventional electronic musical instrument will be described.

FIG. 5 shows the configuration of a conventional electronic musical instrument. In FIG. 5, 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 having different shapes, and 5 is a control unit that generates a control signal. A reading unit for simultaneously reading out the waveforms from the waveform storage units 3 and 4 in response to the control signal, and a control unit 6 for controlling the amplitudes of the two waveform signals output from the reading unit 5 in response to the control signal generated by the control unit 2 A sound system for amplifying an input signal and emitting a sound.

The operation of the electronic musical instrument configured as described above will be described below.

When a key is depressed on the keyboard 1, the control unit 2 detects key depression and outputs a control signal to the reading unit 5 and the amplitude control unit 6 based on the detection information of the pitch and the touch intensity. The reading unit 5 simultaneously reads the waveforms from the waveform storage units 3 and 4 according to the control signal generated from the control unit 2. The amplitude of the output waveform signal is 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 controller 6 corresponds to the pitch and the touch intensity. Here, the amplitudes of the two waveform signals read from the waveform storage units 3 and 4 are respectively controlled in accordance with the pitch and the touch intensity. That is, the volume levels of the two waveform signals are controlled according to the pitch and the strength of the touch. For example, the timbre can be changed according to the strength of the touch.

However, in the above-described conventional configuration, it is possible to change the timbre by the pitch and the strength of the touch, but it is not possible to change the timbre by a so-called musical playing method such as a melody playing method or a chord playing method. Had disadvantages.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an electronic musical instrument capable of automatically distinguishing a melody playing style from a chord playing style and changing a timbre according to the playing style.

Means for Solving the Problems In order to achieve this object, an electronic musical instrument of the present invention has a plurality of waveform storage units each storing a differently shaped waveform, and being simultaneously read out in response to a key press, within a unit time. And a amplitude control unit that controls the amplitude of at least one waveform signal read from each waveform storage unit in accordance with the count data of the key press count unit. Have.

Operation With this configuration, by detecting the number of key presses per unit time and controlling the amplitude of at least one waveform signal based on the detected value, the timbre can be changed depending on the playing state.

Embodiments Hereinafter, embodiments of the present invention will be described 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, reference numeral 101 denotes a keyboard, and 109 denotes a key press count section for counting the number of key presses per unit time, which includes a timer counter for measuring the unit time and a key press number memory. 102 is a keyboard 101 and a key press count section 109
A control unit that generates a control signal according to count data in a key depression number memory, 103 and 104 are waveform storage units that store waveforms of different shapes, and 105 is a control unit that generates a control signal generated by the control unit 102. A reading unit for simultaneously reading out the waveforms from the waveform storage units 103 and 104 is provided.
An amplitude controller 107 controls the amplitudes of the two waveform signals, 107 is an adder, and 108 is a sound system that amplifies and emits an input signal.

FIG. 2 is a key-conversion number volume conversion table included in the control unit 102. Here, V1 is a volume change value for the waveform signal read from the waveform storage unit 103, and V2 is a volume change value for the waveform signal read from the waveform storage unit 104.

The operation of the electronic musical instrument configured 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 reading unit 105 at the timing of key depression,
Referring to the value (= 1) of the key press count memory of the key press count section 109, the volume change values V1 (= 0 dB) and 2 (= 0 dB) are obtained from the key press volume conversion table shown in FIG. The read unit 105 determines final amplitude control information in consideration of the pitch and touch detection information, and outputs a control signal to the amplitude control unit 106.
Waveform storage unit 1 according to a control signal generated from control unit 102
Read the waveforms from 03 and 104 simultaneously. The amplitude of the output waveform signal is controlled by an amplitude controller 106 according to a control signal generated from the controller 102, added by an adder 107, amplified by a sound system 108, and emitted as a musical tone.

When the second key is pressed on the keyboard 101, the key pressed number counting unit 109 refers to the value of the timer counter and compares it with a preset unit time T. If the value of the timer counter is larger than the unit time T, the timer counter is reset, and 1 is written in the key press count memory of the key press count section 109. The operations of the control unit 102, the reading unit 105, the amplitude control unit 106, the adding unit 107, and the sound system 108 are the same as in the first key press.

In the second key press, if the value of the timer counter is equal to or less than the unit time T, the key press number counting unit 109 does nothing to the timer counter and increases the value of the key press number memory by 1 (that is, in this case). , The value of the key depression number memory becomes 2). The control unit 102 reads out the reading unit 105 at the timing of key depression.
And outputs a control signal to the
, The volume change values V1 (= 0 dB), V2 in the key-depression volume conversion table shown in FIG.
(= + 3 dB), the final amplitude control information is determined in consideration of the pitch and the touch strength detection information, and a control signal is output to the amplitude control unit 106. The following operation is the same as that of the first key press.

The third and subsequent key presses are the same as the second key presses.

The unit time T is set to a value for identifying a chord playing style and a melody playing style as described below. The chord playing technique referred to here is a playing technique in which a plurality of keys are pressed substantially simultaneously or distributed in a short time, as shown in FIG.
As shown in FIG. 4, the melody playing technique is a playing technique in which a single key is depressed in a relatively long time. The time from the first key press to the last key press of one chord playing method is Tc,
Assuming that the time between two key presses of the melody playing method is Tm, the unit time T is set so as to satisfy the following expression.

Tc ≦ T <Tm As described above, according to the present embodiment, the number of key presses within a unit time T set so as to satisfy the equation is counted, and the amplitude of the waveform signal is controlled based on the information. You can change the tone by playing style and melody playing style. If the influence of the pitch and the touch intensity on the amplitude is not considered, for example, if the chord playing method shown in FIG. 3 is performed, one of the waveform signals (waveform storage) for the second, third, and fourth notes Volume level of the waveform signal read from the unit 104 is + 3d
B, + 6dB, + 9dB. However, in the case of the melody playing method shown in FIG. 4, the volume level does not change for any sound.
For example, if the waveform of the guitar is stored in the waveform storage unit 103 and the waveform of the picking noise (noise generated when the pick and the string collide) is stored in the waveform storage unit 104, the picking noise is large only during the chord playing method. And can perform very effectively.

Further, in the present embodiment, when many sounds are generated with a small number of channels, the sound volume balance can be corrected. In the present embodiment, two waveforms are synthesized to create one sound.
Need a channel. Therefore, when the system has 32 channels, the maximum number of sounds is 16 sounds. However, when one of the waveforms that attenuates in a short time, such as picking noise, is selected, the number of channels of the picking noise waveform signal is set to 1 regardless of the number of keys pressed.
By limiting to two or two channels,
Many can be pronounced with few channels. (For example, if the system has 32 channels and the picking noise side is limited to 2 channels, the maximum number of sounds is 30
It becomes a sound. However, when this method is applied to the conventional example, there is a problem that the volume of picking noise becomes relatively small, especially in a chord playing method. This is because, for example, when a chord is pressed with four tones, the guitar waveform signal is output on four channels, whereas the picking noise is output on only two channels, so that the volume balance changes. I have. In such a case, the sound volume can be corrected by the present embodiment, and the sound volume balance can be kept constant regardless of the number of simultaneous key presses.

In this embodiment, the case where one sound is synthesized by two waveform signals has been described, but the same applies to the case where one sound is synthesized by three or more waveform signals. In this case, more diverse performance expressions are possible.

In the present embodiment, the control unit 102 simultaneously reads the waveforms from the waveform storage units 103 and 104.
Needless to say, the term “substantially simultaneous” by the time-division processing is included.

In this embodiment, the timer is reset at the time of the first key press or the melody playing method.
A memory for storing the timer counter value is provided, and instead of resetting, the timer counter value at that time is written to that memory, and at the next key press timing, the difference between the timer counter value and the memory value is calculated. You may check it. In this case, there is an advantage that the timer counter can be used jointly with other processing.

Effects of the Invention As described above, the present invention provides a plurality of waveform storage units that store waveforms having different shapes and are simultaneously read in response to key depression, and a key depression count that counts the number of key depressions per unit time. Unit and an amplitude control unit that controls the amplitude of at least one waveform signal read from each waveform storage unit in accordance with the count data of the key depression count unit, so that the melody playing method and the chord playing method are automatically performed. It can identify and change the timbre according to the playing style.

In addition, when a large number of sounds are generated with a small number of channels, the volume balance can be corrected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a diagram showing a key-pressing volume conversion table included in a control unit in the embodiment of the present invention, and FIG. FIG. 4 is an explanatory view showing a chord playing method in the embodiment of the present invention. FIG. 4 is an explanatory view showing a melody playing method in the embodiment of the present invention.
FIG. 5 is a block diagram showing the configuration of a conventional electronic musical instrument. 101 ... keyboard, 102 ... control unit, 103, 104 ... waveform storage unit, 105 ... readout unit, 106 ... ... amplitude control unit, 107 ...
Adder unit, 108 ... Sound system, 109 ... Key press count unit.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-116595 (JP, A) JP-A-2-199500 (JP, A) JP-A-57-46299 (JP, A) 182794 (JP, U) Shokai Sho 57-35997 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G10H 1/053 G10H 1/46

Claims (1)

(57) [Claims] A plurality of waveform storage sections each storing waveforms having different shapes and simultaneously reading out the key press occurrences; a key press occurrence count section for counting key press occurrences within a unit time; An electronic musical instrument comprising: an amplitude control unit that controls the amplitude of at least one waveform signal read from a waveform storage unit according to count data of the key press occurrence count unit.