Music – Instruments – Electrical musical tone generation
Patent
1994-09-13
1996-11-26
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
G10H 500
Patent
active
055787797
ABSTRACT:
A tone generator clears all registers in a twenty-nine stage device so that the previous results are not used in the calculations for a next tone sample. A series approximation of a desired complex sound waveform is achieved by calculating the contributions of twenty-nine time steps back in time. Twenty-nine different address phases are respectively applied to twenty-nine stacked arithmetic units. Each arithmetic unit comprises a first adder that inputs the output of a previous arithmetic unit and the input of the previous arithmetic unit. A second adder inputs the result from the first adder and one of the twenty-nine address phases. The second adder then reads a waveform generator connected to a multiplier that is controlled by a common multiplication factor "B". The output of the twenty-ninth unit produces the desired tone without any of the stacked units feeding back any signals.
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Donels Jeffrey W.
ESS Technology, Inc.
Shoop Jr. William M.
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