Musical tone signal generating apparatus employing sampling of h

Details Musical tone signal generating apparatus employing sampling of h Musical tone signal generating apparatus employing sampling of h

1985-07-23

1987-03-03

Witkowski, S. J.

Music

Instruments

84 101, G10H 108, G10H 700

Patent

active

046466126

ABSTRACT:
In a musical tone signal generating apparatus of a harmonic combination system, the coefficient values of a continuous harmonic to be formed are discretely sampled. Among the sampled values, the values between each two adjacent sampling points (i.e., each two adjacent frames) which vary are selected, and only difference coefficient data therebetween are stored in a memory. When the harmonic coefficient data is to be formed, the difference coefficient data is used for the coefficient varying values between each two adjacent sampling points, and a new coefficient value is calculated. However, as for the nonvarying values between each two adjacent sampling points, no calculation is performed and an already calculated coefficient value is used, thereby updating harmonic coefficients as a function of time, and hence generating a musical tone signal whose tone color is changed as a function of time.

REFERENCES:
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patent: 3823390 (1974-07-01), Tomisawa et al.
patent: 3888158 (1975-06-01), Deutsch
patent: 3913442 (1975-10-01), Deutsch
patent: 4132140 (1979-01-01), Chibana
patent: 4256004 (1981-03-01), Takeuchi
patent: 4352312 (1982-10-01), Whitefield et al.
patent: 4386547 (1983-06-01), Chibana
patent: 4444082 (1984-04-01), Whitefield
Japanese Patent Laid Open Specification No. Sho 55-45056.

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