Wave form generator for sound formation in an electronic musical

Details Wave form generator for sound formation in an electronic musical Wave form generator for sound formation in an electronic musical

1980-06-23

1982-09-14

Truhe, J. V.

Music

Instruments

84 124, 84 128, G10H 100

Patent

active

043489290

ABSTRACT:
A waveform storage and generating system is disclosed in which at least two waveforms are stored. Values of the first waveform are sequentially read out, and smoothing to eliminate step noise is performed. In order to smoothly shift to reading out the second waveform, one or more transitional waveforms are derived which represent amplitude values between the first and second waveforms. The process of reading out the first, transitional, and second waveforms to provide a smooth transition is referred to as cross-fading. Several embodiments, including a microprocessor oriented system are disclosed.

REFERENCES:
patent: 3847349 (1974-11-01), Eastty
patent: 4101964 (1978-07-01), Betts
patent: 4164020 (1979-08-01), Griffith
patent: 4184403 (1980-01-01), Whitefield
Johnson, "Interpolation-A Link Between Programmed Points and Smooth Curves", in Control Engineering, Sep. 1958, p. 153.

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