JP2616006B2 - Tone generator for electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] In order to obtain an electronic musical instrument that can be played by the flaming technique with a simple operation, when the pressing strength of the sounding switch exceeds a predetermined threshold, a signal indicating sounding switch-on. And a signal obtained by delaying this signal by a predetermined time are supplied to a percussion instrument sound source as a trigger signal.

[Industrial applications]

The present invention relates to a musical sound generator having a decorative sound by a flam playing technique in an electronic musical instrument.

[Conventional technology]

There is a flam playing method in which a decorative sound is added immediately before the main sound, but for example, a flam playing method in a percussion instrument such as a snare drum is performed when both hands naturally hit a snare drum with a two-hand drum stick. Uses subtle differences in performance timing.

If you use an electronic musical instrument that generates sound from a rhythm sound source by hitting a drum pad using a pressure sensor or the like with a drum stick, it is easy to perform the above flaming method, but assigning a rhythm sound source to the keyboard and It is practically difficult to perform the flaming technique when playing a rhythm sound source by an operation or when playing with a normal pad switch that can be operated only with the fingertips, because the stick cannot be used and cannot be played with both hands.

Therefore, there are electronic musical instruments provided with a separate flam switch for playing the flam.However, it is difficult to arrange the flam switch on the operation panel because it has to be added. In order to perform the flaming technique, the sound switch must be depressed while operating the flaming switch, so that the performance is often restricted.

[Problems to be solved by the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a musical sound generator for an electronic musical instrument which can be played by a flaming technique with a simple operation and is economical.

[Means for solving the problem]

As shown in the principle diagram of FIG. 1, an operator S for instructing generation of a musical tone, an operation of the operator S is detected, and a sounding instruction signal f and an operation signal p corresponding to the intensity of the pressing operation are output. Operation detecting means F, and an operation signal p from the operation detecting means F
And a threshold value q to determine whether the operation signal p has exceeded the threshold value q. When the operation of the operation element S is detected by the operation detection means F, the sound generation instruction signal f And a second trigger signal k 'delayed from the first trigger signal k by a predetermined time in accordance with the judgment result of the comparing means C. An output means W and a sound source G for forming a tone in response to the first trigger signal k and the second trigger signal k 'from the trigger signal output means W are provided to provide a tone generator for an electronic musical instrument. Configured.

(Operation)

From a musical point of view, the flaming technique is often used to add accent to the beginning, middle, or ending of a song, and therefore, The present inventor has found that it is effective to automatically perform the flaming technique when the depression strength of the sound switch is large. The present invention is an application of this principle.

In the block diagram of FIG. 1 showing the principle of the present invention, when a player depresses an operation element S, an operation detecting means F outputs a sounding instruction signal f, and the sounding instruction signal f is ORed by a trigger signal output means W. It is supplied as a trigger signal to the sound source G via the circuit O, and the tone output from the sound source G is the same as in a conventional electronic musical instrument.

In the present invention, not only the above-mentioned sound generation instruction signal f is supplied to the sound source G as the first trigger signal via the trigger signal output means F as described above, but also to the delay means T of the trigger signal output means W. Is supplied to one input terminal of the AND circuit A as a delayed sounding instruction signal f 'which is delayed by a predetermined time φ by the delay means T.

On the other hand, for example, the pressing intensity p of the operating element S is detected based on the pressing speed of the operating element S as is well known, and the pressing intensity p is compared with a predetermined threshold value q by the comparing means C. If the pressing strength p of the child S exceeds the threshold q, the comparing means C supplies an output of "1" level to the other input terminal of the AND circuit A of the trigger signal outputting means W to enable the AND circuit A. State.

As a result, the delayed sounding instruction signal f 'delayed by the predetermined time φ by the delay means T of the trigger signal output means W is output from the AND circuit A in the enabled state as described above to the second trigger signal k'. And supplied to the sound source G via the OR circuit O.

Therefore, the first trigger signal k output without delay via the OR circuit O of the trigger signal output means W based on the sounding instruction signal f output by one operation of the operation element S.
From a tone output by the delay means T of the trigger signal output means W from the tone generation instruction signal f.
The tone generator G continuously outputs two tones, including a tone output by the second trigger signal k ′ delayed from the first trigger signal k.

As described above, according to the present invention, it is possible to select whether or not to use the flam performance only by adjusting the operation intensity of the operation element S, and to start the performance by the flam performance by appropriately setting the above-described threshold value q. It is possible to set the pressing strength of the operating element S to be pressed.

Further, by setting the delay time φ by the delay means T as desired, it is possible to change the performance effect by the flaming technique.

〔Example〕

FIG. 2 is a block diagram showing a circuit configuration of an embodiment of the present invention, and FIG. 3 is a waveform diagram of this embodiment.

It should be noted that the sound generation switch 1, the depression detection unit 2, the comparator 9 shown in FIG.
The percussion instrument sound source 11 corresponds to the operation element S, the operation detection means F, the comparison means C, and the sound source G in FIG. 1, respectively.
The flip-flops 3-1 to 4-2, the AND circuits 5, 6, the OR circuit 7, and the counter 10 in FIG. 2 all correspond to the components of the trigger signal output means W in FIG.

When the sounding switch 1 is depressed, the press detection unit 2
The switch-on signal and the signal indicating the pressing intensity shown in FIG.

Flip-flop 3-1 and 3-2 and AND circuit 5
Immediately responds to the above switch-on signal.
To generate the percussion sound assigned to this sound source from the
The flip-flop is supplied to the data input terminal D of the flop 3-1 to set the flip-flop, and the OR circuit is set until the next flip-flop 3-2 is set by the next clock (FIG. 3 (c)). 7 to generate an output signal of the AND circuit 5 shown in FIG.

The depressing strength of the sounding switch 1 is obtained as a voltage by, for example, measuring the closing time difference between two sets of contacts that are sequentially closed by depressing the switch by the pressing detecting unit 2, and this voltage is determined by a data preset unit. 8, the comparator 9 compares the voltage with the threshold value preset as the voltage corresponding to the pressing speed of the sound switch for starting the flaming technique,
When the voltage corresponding to the pressing intensity exceeds the threshold value, the comparator 9 outputs a signal "1" shown in FIG. 3 (b).

The counter 10 is a part of the delay means T shown in FIG. 1, and is in a reset state during a period in which the switch-on signal is not output from the press detection unit 2, and the switch-on signal is When output from the section 2, the clock of FIG. 3 (c) is frequency-divided according to the count value for determining the frequency division ratio set in the data preset section 8, as shown in FIG. Generate a divided clock.

A flip-flop 4-1 in which a Q terminal output of the flip-flop 3-2 is supplied to a data input terminal D.
Is supplied at the rising edge of the frequency-divided clock, and its set output Q is supplied to one input terminal of a three-input AND circuit 6 and the data input terminal of the next stage flip-flop 4-2. Since -2 keeps the reset state until the next clock is supplied, a signal of "1" level is supplied to the two input terminals of the three-input AND circuit 6.

At this time, if the pressing intensity of the sound switch 1 exceeds the threshold value to which the flaming technique is applied, the comparator 9 outputs a signal of “1” level to the remaining one of the three-input AND circuit 6.
And AND circuit 6
Generates an output shown in FIG. 3 (f), which output is equal to the number of clock periods corresponding to the count value for determining the frequency division ratio of the counter 10 with respect to the output from the AND circuit 5. It is delayed by the delay time φ.

Therefore, as shown in FIG. 3 (g), the outputs from the AND circuits 5 and 6 shifted by the delay time φ are supplied from the OR circuit 7 to the percussion instrument sound source 11 as a trigger. A tone having a decorative sound waveform as shown in FIG.

If the depression of the sound switch 1 is too weak to perform the flaming technique, the output from the comparator 9 is always at the "0" level, and the three-input AND circuit 6 also keeps the cut-off state. 3 (f) of the AND circuit 6 is not generated, so that only one output from the AND circuit 5 is supplied to the percussion instrument sound source 11 to generate a musical tone without ornamental sound. become.

In the embodiment shown in FIG. 2, a signal indicating the pressing strength of the sound switch 1 is supplied from the pressing detecting section 2 to the percussion instrument sound source 11 as well as to the comparator 9. It is configured to control the strength, that is, the amplitude, with this pressing strength signal, so that when the volume is loud, the flaming technique is automatically performed, but when the flaming technique wants to add an accent to the song, This embodiment is preferable in performance because it is often used.

However, for example, a means for switching the presence or absence of such control of the strength of the percussion instrument sound by the pressing strength signal can be provided as a changeover switch in the data preset section.

Further, by changing the setting of the above-mentioned threshold value in accordance with the music to be played, it is possible to change the pressing strength of the sound generation switch at which the flam playing technique is started, and by adjusting the setting of the delay time, the flam playing technique is changed. It will be clear that the decorative effect can also be changed.

Alternatively, a sounding instruction signal and a pressing strength signal corresponding to the sounding instruction may be input in the form of a MIDI signal, and a flaming effect may be provided based on the input signal.

Further, the present invention can be realized not only by hardware but also by software, so that not only the rhythm playing method of percussion instrument sound but also the effect of the flam playing method can be given to the operation of the pitch designation keyboard.

Further, control may be performed so that musical tone elements such as the volume and tone of the ornamental sound and the main tone that are sounded when the flam effect is applied are made different.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the flaming technique often used when it is desired to add an accent to a song such as an introduction portion, a middle portion or an ending of a song is automatically performed only by changing the pressing strength of an operation switch such as a sound switch. The special effect that can be achieved.

[Brief description of the drawings]

 FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is an operation waveform diagram of the embodiment of FIG.

Claims (1)

(57) [Claims] An operation element for instructing generation of a musical tone; operation detection means for detecting an operation of the operation element and outputting a sounding instruction signal and an operation signal corresponding to the intensity of a pressing operation; Comparing the operation signal from the means with a threshold,
Comparing means for determining whether or not the operation signal has exceeded a threshold value; and when an operation of an operation element is detected by the operation detection means, a first trigger signal is output based on the sounding instruction signal, and A trigger signal output means for outputting a second trigger signal delayed by a predetermined time from the first trigger signal in accordance with a result of the judgment by the comparing means; a first trigger signal from the trigger signal output means;
And a sound source that forms a musical tone in response to the trigger signal of the electronic musical instrument.