Tone waveshape generation device

Details Tone waveshape generation device Tone waveshape generation device

1984-04-09

1985-06-04

Isen, Forester W.

Music

Instruments

84 101, 84 113, G10H 102

Patent

active

045207089

ABSTRACT:
In a waveshape memory, a first waveshape of plural periods including an attack portion and a second waveshape of plural periods are stored. A tone waveshape signal is produced by reading out the first waveshape once and thereafter reading out the second waveshape repeatedly. The first waveshape is a first section including an attack portion cut off from a desired original tone waveshape. The second waveshape is principally composed of a second specified section succeeding the first specified section cut off from the original tone waveshape. A terminal portion in the second specified section is weighted with decay characteristics and is added with a corresponding terminal portion of the first specified section which has been weighted with attack characteristics, thereby effecting smooth connection between the respective waveshapes.

REFERENCES:
patent: 4348929 (1982-09-01), Gallitzendorfer
patent: 4383462 (1983-05-01), Nagai
patent: 4442745 (1984-04-01), Gross et al.

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