Music – Instruments
Patent
1986-03-05
1987-11-17
Witkowski, S. J.
Music
Instruments
84 11, 84 119, 84 126, G10H 102, G10H 142, G10H 700
Patent
active
047065370
ABSTRACT:
Waveshapes of plural periods for plural channels having characteristics different from each other are stored in a waveshape memory and read out from it when a musical tone is to be produced. Read out waveshapes are respectively weighted by weighting data supplied from a weighting data generator and thereafter a desired tone waveshape is obtained by electrically or acoustically combining these weighted waveshape. As an example, the waveshapes are composed of plural attack waveshapes equal in number to channels and only one sustain waveshape. In this case, the attack portion of the musical tone is formed by the combined one of the attack waveshapes and the sustain portion is formed by the sustain waveshape. This enables the memory capacity of the waveshape memory to be reduced and facilitates the complex tone color control in the attack portion. In another case, each of the waveshapes is composed of an attack portion and a sustain portion, sustain waveshapes forming the sustain portions being matched in phase. In both of the above cases, weighting data may be different depending upon a tone color to be imparted on the musical tone.
REFERENCES:
patent: 4383462 (1983-05-01), Nagai
patent: 4442745 (1984-04-01), Gross et al.
patent: 4502361 (1985-03-01), Viitanen et al.
patent: 4520708 (1985-06-01), Wachi
patent: 4524666 (1985-06-01), Kato
patent: 4573389 (1986-03-01), Suzuki
patent: 4635520 (1987-01-01), Mitsumi
patent: 4638710 (1987-01-01), Kitamura et al.
Nippon Gakki Seizo Kabushiki Kaisha
Witkowski S. J.
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