JPS6049394A - Electronic musical instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION As described above, according to the present invention, in a device that generates a voltament effect or a chromatic grissando effect, the frequency of the slide clock is adjusted according to the difference in the number of keys between a starting key and a destination key. It is equipped with means for changing the key so that the sliding time from the starting key to the destination key is optimized. As a result, the sliding time from the starting pot to the target key is too fast and the sliding feeling is lost, and the sliding time is too long and the sliding time is too long and the player cannot easily reach the target key from the starting point to the target key, causing a feeling of frustration. This makes it possible to give the effect with the optimum slide time. −

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of the voltamento/chromatic glissando effect generator according to the proposed example, Fig. 2 is an explanatory diagram of the problems with the conventional example, which is a simplified version of Fig. 1, and Fig. 5 is the general operation of the slide effect. Explanatory diagrams, FIGS. 4(α) and (b) are principle explanatory diagrams comparing the operation of the conventional example and the present invention, FIG. 5 is a configuration explanatory diagram of the embodiment of the present invention, and FIGS. 6 and 7 The figure is a detailed view of the main parts of the embodiment. In the figure, 100 is a voltamento/chromatic gripundo generator, 201 is a slide clock generator, and 202 is a frequency conversion data memo! J, 203 indicates a key number difference detector. Patent Applicant Kawai Musical Instruments Co., Ltd. #Sakusho Agent Patent Attorney 1) Yoshishige Saka Figure 3 Figure 4 Difference in number of keys Figure 5 Difference in number of keys Figure 6 Figure 7

Claims (1)

[Claims] The slide clock generator produces a voltament effect in which the musical tone frequency continuously shifts from one pressed key to the next pressed aperture, and a chromatic grissando effect in which the musical tone frequency shifts discretely at chromatic interval intervals. In a four-child musical instrument that is slid according to the frequency of an output slide clock, means for detecting a difference in n number between a starting key and a destination key, and changing the frequency of the slide clock according to the detected difference in number of keys. vinegar. from the starting point to the destination key.
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Then, the key data latch pulse generation circuit 2 also sends the pass signal to the key data latch pulse generation circuit 2.
2 to 122. -11'25 A lattin and <pass completion are generated on both sides, and the respective key data are stored in the follow-up key data calculation register 26 and the target key data register 25. When the key data of the second pressed key is generated on key code registers 1 to 11 to J21, two pulses are generated on 125, and the 24th key data is stored in the target key data register 25 and the target key is This becomes data B. The key data of the first pressed key remains stored in the follow-up key data calculation register 23 as follow-up key data. Follow-up key data A and target key data B are compared by a comparator 24. At the first press, the number 1 is generated on A=BL:D724, and the counter 29 is reset via the NOT gate 63, and the AND gate 31 is turned off. If the condition of A=H is not satisfied with the second press, 124
The upper signal disappears and the counter 29 is reset and AN
The OFF state of the D gate 61 is released. If A) B, the follow-up key data A is larger, so the selector 26 sends the output on the 127 of the counter 29 that counts the output of the clock generator 60 to the 132, and calculates the output of the follow-up key data calculation register 26 one by one. Subtract. A
(If B, target key data B is larger, so 1
55, the contents of the follow-up key data calculation register 23 are incremented by one. In this way, the follow-up key data A approaches the target key data B, and when they exactly match, A=B is established again, a signal is generated on 124, the counter 29 is reset, and the AND gate 61 is also turned off. The AND gate 61 is ON if the switch is turned down when A>B or A<B, that is, during the frequency slide interval, and when the switch is turned down. output is 1
15. 0-GLISS, if the switch is pushed down to the side, it will be unconditionally OFF. The output on 127 of counter 29 corresponds to the time for incrementing half-tone intervals, and the output on 128 of clock generator 6o corresponds to the time for finer increments between half-tone intervals. The follow-up key data A, which is calculated by ±1 at the output timing of the counter 29, passes through t5 to 11° and becomes the address signal of the note frequency number memory 5, which corresponds to the follow-up key data A that changes at intervals of 9 semitones. The frequency number 11
1 with the note frequency number as R. In the end, the note frequency number R changes at semitone intervals according to the output of the counter 29 until the follow-up key data A becomes equal to the target key data B, thereby realizing a chromatic glissando effect movement. 0-GLISS, if the switch is knocked down on the side, 1
Since no signal is generated on 13, data selector 6 is OFF.
F, and the division note frequency number Q' on tlJ is 0.
The accumulated note frequency number Q// on 115, which is the output of the accumulator 7, also becomes 0. Therefore, the calculation note frequency number R' on J17, which is the output of adder 9, is equal to k
Become. After all, based on 几', it is converted into a frequency signal proportional to the calculated note frequency number π by the frequency generator 12, which drives the musical waveform generator 13 and is emitted by the sound system 14, thereby realizing a chromatic glissando effect. . On the other hand, if the switch is knocked down on the side of Fat Rin T, then AN
When the D gate 61 is ON, the output of the clock pulse generator 6o on 128 is sent out on 113 during the period of A>B or A (B. That is, every time a clock pulse is generated on 128, the output on 128 of the clock pulse generator 6o is sent out on 113. is ON, divide note frequency by dividing R by N, Q' = R/N by 114
Send upward. Accumulator 7 accumulates Q' occurring on 114. After accumulating a certain number of times p, the output on 127 of the counter 29 is output to the selector 26 at the next clock pulse.
The follow-up key data calculation register 26 performs a calculation of ±1, clears the contents of the accumulator 7 through the NAND gate 66, and temporarily turns off the AND gate 31 through the NoT gate 35. and prevents Q' from being sent from the data selector 6 to the accumulator 7. The complementer 8 is controlled by the word on 125, and if A:>B then Q' on 115 is -Q'', otherwise +.''
116, and then sent to the adder 9. That is, it is assumed that the larger the key data, the higher the pitch range (the higher the note frequency). Therefore, if the tracking key data A is larger than the target key data B, the note frequency number R, which is proportional to the note frequency, is also larger in the tracking key data A, so it is necessary to subtract the note frequency number R, and cr' -Q// must be converted. Of course, if A minus B, q' may be +Q#. As an example, note frequency numbers Kame, 几2.几a(R4(
If 几2 and 几3) are each at semitone intervals, and if the following key data A corresponds to 几l and the target key data B corresponds to 几3, then each time a clock pulse occurs on 115, the calculation note frequency Number R' is from R1 + RXN → R1 + 2
(几17N)→几1+6(几V/N)・・・・・・→几1+p(几〆K) Then, at the p+1st clock pulse, an output is generated from the counter 29 to 127, and the follow-up key data A is updated and becomes R2 p, NARD gate 36
The contents of the accumulator 7 (here p(&/N)) are cleared via the . Due to the p+2nd and subsequent clock pulses, 几2→R2+
n4/N+R2+2 (几v′N):・・・・・・→R2+
It changes as p(几2/N)→R3, A=B is established, and the frequency slide stops. That is, compared to the case of the chromatic glitsand effect in which the calculated note frequency number R' changes at semitone intervals such as 几1 → R, → 几3, each 几l, 几2 +
By interpolating between R3, a smoothly changing calculated note frequency number R' can be obtained, and a portamento effect can be realized. Both of the effects that are problematic in the present invention are the portamento effect, in which the sound frequency of musical tones continuously shifts from the pressed key to the next pressed key, and the portamento effect, in which the sound frequency of the musical tone continuously shifts from the pressed key to the next pressed key, and In this proposal, the chromatic glissando effect, in which the sound frequency shifts due to a discrete change in pitch interval, is performed at a slide speed proportional to the period of each slide clock pulse output from one clock generator 60. That is, the counter 2 where both the voltamento effect and the chromatic grissando effect are sent out on 127.
Since the note frequency number R is based on the note frequency number R that is read out based on the change in the follow-up key data A that is updated according to the output of step 9, the time required to move from the pressed key to the next pressed key is is the same for both effects. FIG. 2 is a conventional example that is a simplified version of FIG. 1, and the problems will be explained using this example. That is, in contrast to the voltamento/chromatic glissando effect generator 100, a slide clock generator 101 corresponding to the clock generator 30 in FIG.
is provided. The slide speeds of both effects are determined in proportion to the frequency of the slide clock on line 12B, which occurs more frequently, and the frequency 1ff for generating musical tone frequencies is determined.
+9. is sent to a musical tone frequency generator (not shown). Since this slide clock frequency is constant, the time it takes to slide from the starting point to the destination key is the pitch interval (
(difference in number of keys). This means that, for example, 61 keys (O
x-07), especially if the starting twist is set to C2.
If you set the objective key to 07 and set the slide clock so that the arrival time from 02 to 07 is the optimal time tx, the sliding time of the chromatic scale, for example starting from 02° and objective key C snow, will be very different. Wow It's hard to perceive the feeling of sliding because it misses for a short time. Conversely, if the slide clock is set so that the sliding time tn from the starting point C2 to the destination key Ct feels like a slide, the sliding time from the starting point C2 to the destination key C7 is 60·t7. It becomes longer than this, and it becomes difficult to reach from the starting aperture to the destination aperture, which creates a sense of frustration. However, once the slide clock frequency is set, it remains constant and the slide time for many differences in the number of keys becomes unsatisfactory, which is very inconvenient for performance. (3) Purpose of the Invention The purpose of the present invention is to provide a t-cone system device that is set to optimize the slide time from the starting ridge to the target cone in a device that generates portamento effects and chromatic gripundo effects. It is. (4) Structure of the Invention In order to achieve the above object, the electronic musical instrument of the present invention has a portamento effect in which the musical tone frequency continuously shifts from the pressed aperture to the next pressed key, and the I Means for detecting the difference in the number of keys between the starting key and the target key in a one-child instrument that is slid by the frequency of the slide clock output from the slide clock generator or by the chromatic grip effect that shifts in the number of rings. and a means for changing the frequency of the slide clock according to the detected difference in the number of keys, so that the slide time from the starting point to the destination key is optimized. (5) Embodiment of the Invention Figure 5 is a general explanatory diagram of the operation of the slide effect, and Figure 4 (α
) and (6) are principle explanatory diagrams showing a comparison between a conventional example and an embodiment of the present invention. FIG. 6 is a diagram showing how the slide clock upslides from the Dt note to the F note. The chromatic scale is aurally continuous and has eight untitled steps, but is not limited to this. The chromatic scale from D# note to E note is D based on the frequency information of E note.
#Subtract the frequency information of the sound and divide the subtraction result into 8 stages
The division result is accumulated by the slide clock, and the accumulated result is added to the D' note, and the u8 result is used as frequency information at each stage. However, there are cases where the division result cannot be expressed within the accuracy of the division means, so if you add the division result to the frequency information at the 67th time point to move from the 67th time point to the 68th time point, the B' sound is shifted from the actual E sound. Therefore, at the 68th point, the frequency information of sound E is directly output. Then continue from E to F.
The chromatic scale up to the note is performed by a similar procedure. In this way, the slide from the ♂ note to the F note is made by combining each chromatic scale. If this slide time is t, then it is 2・ta, which is twice the slide time ta of the chromatic scale,
Further, if the slide clock speed is ts, it is 16·ts. From the above, the slide time t is determined by the relational formula % Formula % In addition, in the same figure, when there is a voltament effect, the frequency and 1# information at each point in time, indicated by The sound frequency of the musical tones is shifted to a degree that does not cause any noise. In the case of chromatic grit sand, frequency information only at a certain point in time is sent to the musical tone frequency generator, as indicated by ■, and transitions are made by discrete changes in chromatic intervals. FIG. 4 shows a graph (α) showing the relationship between the difference in the number of keys (interval interval) and the required slide time, and a graph (b) showing the relationship between the difference in the number of keys and the slide clock speed. The solid line shows the conventional method in which the system slide clock is constant, and the broken line shows the method of the present invention. In the graph of FIG. 4 (OL), the solid line indicates that the sliding time from the starting point to the destination key is proportional to the number difference from the starting point to the destination key. If the slide time of the chromatic scale interval is ta, it means that the slide time required for the β number difference n is n-ta. The broken line indicates that the time required to reach the starting point and the destination key is not proportional to the difference in fraud numbers from the starting point to the destination key. Let ta be the slide time of the chromatic scale interval, then the slide time required for the key difference country is tvt (1
This means that it is not. Figure 4 (6) is the fourth
The solid lines shown in Fig. 4 (a) correspond to the solid lines in Fig. 4 (α), where the slide duration is constant regardless of the difference in the number of keys when the required slide time is proportional to the difference in the number of keys. The broken line indicates that the slide clock speed is i due to the difference in the number of keys in the case of the present invention, which is the broken line in FIG. 4 (α).
nn (n: difference in the number of keys), which means that the slide clock speed is increased every time the difference in the number of keys is n. Here, although it is illustrated as a broken line for the purpose of explaining the present invention, the slope of the straight line can be set arbitrarily, it does not have to be a straight line, and the difference in the number of keys can be grouped. difference(
1, 2) are the same (5, 4)...-(tL-1, n, l
You may set the slide clock speed as . In this way, the above-mentioned characteristic (α) in the same figure is set so that the slide time is optimal according to the difference in the number of keys, and a slide clock suitable for this is sent to the voltamento chromatic glitsand effect generator 1oO. You can configure it like this. FIG. 5 is a block diagram showing the (U configuration) of the embodiment of the present invention. The voltamento/chromatic scale gripundo effect generator 100 is the same as that shown in FIG. It is driven by the slide clock from the clock generator 201, and sends frequency information to a musical tone frequency generator (not shown) for generating a musical tone frequency at a speed corresponding to the slide clock speed.As a result, the musical tone frequency The change corresponds to the speed of the slide clock. However, in the present invention, the plurality of keys are 61 keys from 02 to C7, and 02 to C7 are numbered 0 to 60 (hereinafter referred to as numbers). A key number difference detector 20 that calculates the key number difference from a key assigner (not shown)
6, the departure key number and destination key number are sent. When each key number is sent, the key number difference detector 203 calculates the key number difference and sends the result to the frequency conversion data memory 202. The frequency conversion data memory stores conversion data for changing the slide clock speed from the slide clock generator 201 according to the difference in the number of keys, and performs the corresponding conversion according to the difference in the number of keys from the key number difference detection a205. Data is read and sent to slide clock generator 201. Then, a slide clock from the slide clock generator 201 having a speed determined by the β number difference is applied to the portamento chromatic glissando effect generator 100. Therefore, the required slide time is not proportional to the difference in β numbers, but can be optimally selected according to the difference in the number of keys. FIG. 6 is a detailed diagram of the slide clock generator 201 of FIG. 5. Frequency conversion data corresponding to the difference in numbers sent from the frequency conversion data memory (corresponding to 202 in FIG. 5) is held in the two-way switch 602 before the slide effect starts, and the conversion data is transferred from the latch 302 to the system clock. is applied to a program counter 301 that can arbitrarily divide the frequency. The program counter 301 divides the system clock based on the applied conversion data, and generates a slide clock with an optimal speed according to the difference in the number of keys. FIG. 47 is a detailed diagram of the slide clock generator 201 shown in FIG. The frequency conversion data corresponding to the difference in the number of keys sent from the frequency conversion data memory (corresponding to 202 in Fig. 5) is converted into an analog α positive amount by the digital-to-analog converter 402, and voltage control is performed using this analog voltage. type oscillator (VOO
) 401, the voltage controller oscillator 4
A slide clock with a frequency (speed) corresponding to the even number difference from 01 is oscillated.