Tone generating apparatus utilizing preprogrammed fade-in and fade-out characteristics
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United States of America Patent
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Feb 8, 1994
Grant Date -
N/A
app pub date -
Apr 29, 1991
filing date -
May 2, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A tone generating apparatus comprises a wave memory for consecutively storing first tone wave data acquired by performing pulse code modulation on a tone waveform in a first predetermined interval starting at an attack of a musical tone, second tone wave data provided by adding that tone wave data which is obtained by performing pulse code modulation on a tone waveform in a second predetermined interval following the first predetermined interval and is then weighted with a fade-out characteristic and that tone wave data which is acquired by synthesizing waveform components of a tone waveform in a third predetermined interval following the second predetermined interval and is then weighted with a face in-characteristic after being linked for the second predetermined interval, and third tone wave data produced by synthesizing waveform components of a tone waveform in a third predetermined interval following the second predetermined interval based on a characteristic of the tone waveform in the third predetermined interval. The first tone wave data, the second tone wave data and the third tone wave data are read out once in the named order from the wave memory, and then the third tone wave data is repeatedly read out, thereby generating a tone signal.
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