Music – Instruments – Electrical musical tone generation
Patent
1995-09-12
1998-01-27
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84DIG9, 84DIG10, G10H 112
Patent
active
057124396
ABSTRACT:
A musical tone signal producing apparatus having a loop circuit portion including a filter circuit and a delay circuit for circulating therethrough a vibratory waveform signal to be produced as a musical tone signal and a control signal generator for generating a first control signal for effecting excitation of the waveform signal in the loop circuit and applying the first control signal to the filter circuit and for generating a second control signal for applying time variation to the waveform signal. The musical tone signal producing apparatus further includes a filter control circuit for modifying the second control signal based on the vibratory waveform signal and for applying a control parameter defined by the modified second control signal to the filter circuit for control of a signal transmission characteristic of the filter circuit.
REFERENCES:
patent: 5223656 (1993-06-01), Higashi
patent: 5241127 (1993-08-01), Kobayashi
patent: 5313013 (1994-05-01), Suzuki et al.
patent: 5359146 (1994-10-01), Funaki et al.
patent: 5403969 (1995-04-01), Muto
patent: 5496964 (1996-03-01), Suzuki
Witkowski Stanley J.
Yamaha Corporation
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