Music – Instruments
Patent
1985-08-27
1987-07-14
Witkowski, S. J.
Music
Instruments
84 11, 84DIG9, 84DIG10, G10H 112, G10H 700
Patent
active
046794808
ABSTRACT:
A first waveshape memory stores a full waveshape of a tone from the start to the end of sounding of the tone or a portion thereof in plural periods. A second waveshape memory stores waveshape data of a modification waveshape for the full waveshape or the portion thereof. A tone waveshape signal read out from the first waveshape memory and a modification waveshape signal read out from the second waveshape memory are both multiplied with respective coefficients whereby these waveshape signals are weighted. These weighted waveshape signals are added together to provide a mixed tone signal. By controlling the coefficients, the tone color imparted on the mixed signal is variously determined. The coefficients for the tone color control are provided in accordance with key scaling, key touch or operation states of control knobs. Thus, tone signals having a variety of tone color changes can be realized without the necessity of many wave memories.
REFERENCES:
patent: 4130043 (1978-12-01), Niimi
patent: 4200021 (1980-04-01), Chibana
patent: 4224856 (1980-09-01), Ando et al.
patent: 4352312 (1982-10-01), Whitefield et al.
patent: 4383462 (1983-05-01), Nagai et al.
patent: 4566364 (1986-01-01), Katoh
Nippon Gakki Seizo Kabushiki Kaisha
Witkowski S. J.
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