Polyphonic digital synthesizer of periodic signals

Details Polyphonic digital synthesizer of periodic signals Polyphonic digital synthesizer of periodic signals

1980-06-10

1982-08-17

Truhe, J. V.

Music

Instruments

84 119, G10H 100

Patent

active

043443435

ABSTRACT:
An entirely digital polyphonic musical synthesizer in which the amplitude of each spectral component may develop either linearly or logarithmically as a function of time, including amplitude computation means which produce, for each period of an amplitude clock signal, a new current amplitude value by linear or logarithmic interpolation between the initial current amplitude and a predetermined final amplitude value. The new current amplitude value is memorized in place of the initial value. When the current amplitude is equal to the final amplitude, a signal is transmitted to the synthesizer control means. The synthesizer enables gentle modulations in amplitude to be obtained and reduces the complexity of the instrument's control means.

REFERENCES:
patent: 4036096 (1977-07-01), Tomisawa et al.
patent: 4128032 (1978-12-01), Wada et al.
patent: 4205575 (1980-06-01), Hoskinson et al.
patent: 4245541 (1981-01-01), Deutsch

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