Digital tone generation system utilizing fixed duration time fun

Details Digital tone generation system utilizing fixed duration time fun Digital tone generation system utilizing fixed duration time fun

1980-09-25

1982-09-28

Witkowski, S. J.

Music

Instruments

84DIG9, 84DIG10, G10H 112, G10H 700

Patent

active

043512194

ABSTRACT:
A tone generation system intended primarily for use in electronic musical instruments wherein a digital representation of a harmonically rich waveform is sampled, and a musical tone is produced therefrom. The stored waveform could be the four term Blackman-Harris window function, which has negligible side lobes and thus greatly attenuated higher harmonics. The stored function is read out at a fixed rate, but the time periods between successive readings of the waveform are varied to thereby vary the frequency of the output signal.

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Harold G. Alles, Music Synthesis Using Real Time Digital Techniques, Apr. 1980, Proceedings of the IEEE, vol. 68, pp. 436-449.
Fredric J. Harris, On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform, Jan. 1978, Proceedings of the IEEE, vol. 66, No. 1, pp. 51-83.

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