Electronic musical instrument having physical model tone generat

Details Electronic musical instrument having physical model tone generat Electronic musical instrument having physical model tone generat

1992-02-11

1993-08-31

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84627, 84660, 84661, 84663, 84DIG9, 84DIG10, G10H 1057, G10H 108, G10H 112

Patent

active

052411290

ABSTRACT:
An object of the present invention is to provide an electronic musical instrument which can generate a plurality of tones in spite of the inexpensive and simple structure thereof and can correct the quantity of phase delay of a closed loop in a physical model tone generator without use of any special processor such as a high-speed CPU or a dedicated numerical operation processor, not only to thereby attain performance effects of echo, chorus and the like but to simulate a performance style of repeating the operation of one string or key in the condition in which a tone corresponding to the string or key remains, without production of noise even when parameters for constituent elements of the physical model tone generator are respectively changed widely. The electronic musical instrument includes a driving waveform for storing a plurality of driving waveform data corresponding to performance information in advance, and a closed loop constituted by a shift register and a low-pass filter. The plurality of driving waveform data are supplied into the closed loop and repeatedly circulated while applying at least a delay process and a decay process onto the plurality of driving waveform data by way of time division corresponding to the performance information. As a result, a plurality of signals circulating in the closed loop are generated as a plurality of tone signals.

REFERENCES:
patent: 4691608 (1987-09-01), Sasaki et al.
patent: 4748888 (1988-06-01), Oya
patent: 4984276 (1991-01-01), Smith

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