Input apparatus of electronic system for extracting pitch data f

Details Input apparatus of electronic system for extracting pitch data f Input apparatus of electronic system for extracting pitch data f

1989-04-10

1991-05-28

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84654, 84665, G10H 118, G10H 146

Patent

active

050184270

ABSTRACT:
An input waveform signal is first converted into a compressed waveform signal by log-conversion. The compressed waveform signal is then converted into a digital compressed waveform signal so that a pitch of the input waveform signal is extracted from the digital compressed waveform signal. Note-on/off states of a musical tone to be produced are controlled in accordance with the level of the digital compressed waveform signal and a predetermined threshold. The attenuation period of the input waveform signal and, thus, the note-on time, can therefore be prolonged to correspond more closely with the actual playing of an instrument from which the input waveform signal is obtained.

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