JPS5951400U - electronic musical instruments - Google Patents

Abstract

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

Description

[Brief explanation of drawings]

Figure 1 is an overall explanatory diagram of an electronic musical instrument to which the present invention is applied;
Figure, Figure 3, Figure 5, Figure 8, Figure 9, Figure 10, Figure 1
Figure 1, Figure 12, Figure 14, Figure 19, Figure 20, Figure 2
Figures 1 and 22 are explanatory diagrams of the main parts of Figure 1, Figure 4,
Figure 6, Figure 7, Figure 13, Figure 15, Figure 16, Figure 1
7 and 23 are time charts of the corresponding configurations, and FIG. 18 is a diagram explaining the principle, in which 101 is a keyboard circuit, 102 is a key assigner, 103 is an envelope level storage circuit, 104 is an address generation circuit, 105,1
06 is a multiplication circuit, 107 is a temporary storage circuit, 108 is a tone selection switch, 109 is a tone control circuit, 110 is a waveform data storage circuit, 111 is a transfer control circuit, 112 is a waveform calculation circuit, 113 is an accumulation circuit, 114 is a A latch circuit and a DA conversion circuit, 1401 and 1402 are random access memories (RAM), 1407 is an up/down counter, 1408 is a complementer, 1423 and 1424 are multipliers, 1
425 is an adder, 1901-1903, 2001.20
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Claims (1)

[Scope of utility model registration request] In an electronic musical instrument having a plurality of keyboards including an upper keyboard, a lower keyboard, and a foot keyboard, key code signals corresponding to key presses and key releases are transmitted in a first time-division time slot corresponding to the number of keys on the keyboard. a second key code signal corresponding to the number of simultaneous polyphony;
time-division number changing means for generating a key code signal in the time-division number changing means; the key code signal from the time-division number changing means corresponds to a key press signal, a key release signal, and a key press exceeding the number of simultaneous polyphony; A key information generating means for generating a signal, a means for cumulatively adding up a key press signal, a key release signal obtained by the key information generating means, and a sparrow constant corresponding to a signal greater than the number of simultaneous pronunciations; Means for reading out the envelope signal E of the envelope level storage circuit according to the signal; waveform data generating means for generating waveform data a, b, c in the second time division time slot; the envelope signal vE and the waveform data a, b; , c; means for generating a musical tone period t corresponding to a key press in the second time-division time slot; f(t)=a
An electronic musical instrument characterized by comprising musical sound waveform calculation means for calculating t2·vE+btVE+C−vE.