Tone signal generation device for an electronic musical instrume

Details Tone signal generation device for an electronic musical instrume Tone signal generation device for an electronic musical instrume

1985-01-09

1987-01-06

Adams, Russell E.

Music

Instruments

84 128, G10H 100

Patent

active

046337490

ABSTRACT:
A musical tone signal generator for an electronic musical instrument is constructed by a waveshape generator, a function generator and an interpolator. The waveshape generator successively generates adjacent two waveshapes of a plurality of different waveshapes which have been intermittently sampled in an actual produced tone. The function generator generates an interpolation function which is a function of time. The interpolator weights the adjacent two waveshapes in accordance with the interpolation function, combines the weighted two waveshapes and outputs the combined waveshape as a musical tone waveshape to be produced at a rate corresponding to a frequency of the musical tone waveshape. In the waveshape generator, the generation of next two adjacent waveshapes are performed when a value of the interpolation function has become equal to a predetermined value. As a result, it is made possible to obtain a good quality timewise spectrum change of the musical tone waveshape.

REFERENCES:
patent: 3809786 (1974-05-01), Deutsch
patent: 3821714 (1974-06-01), Tomisawa
patent: 3888153 (1975-06-01), Deutsch
patent: 4133241 (1979-01-01), Niimi et al.
patent: 4215619 (1980-08-01), Budelman et al.
patent: 4231277 (1980-11-01), Wachi
patent: 4246823 (1981-01-01), Wachi et al.
patent: 4348929 (1982-09-01), Gallitzendorfer
patent: 4520708 (1985-06-01), Wachi

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