Music – Instruments – Electrical musical tone generation
Patent
1993-01-14
1994-02-22
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84604, 84627, 84633, G10H 1057, G10H 146, G10H 702
Patent
active
052889408
ABSTRACT:
A tone generating apparatus which comprises a wave memory in which first tone waveform data with a preselected length extracted from an attack portion of a musical tone and second tone waveform data with a preselected length following the first tone waveform data and having a value of zero are stored. A read circuit reads the first tone waveform data only once from the wave memory and subsequently reads the second tone waveform data repeatedly. A tone generator generates a musical tone based on the tone waveform data read out by the read circuit. In reading out tone waveform data from the wave memory, the first tone waveform data is read out first, followed by repetitive reading of only the second tone waveform data.
Repetitive reading of the second tone waveform data produces no sound because the contents of the second tone waveform data are zero. Thus, this system performs a function equivalent to tone release effected by reading out a one-shot waveform.
REFERENCES:
patent: 4263828 (1981-04-01), Aoki et al.
patent: 4573389 (1986-03-01), Suzuki
patent: 4947723 (1990-08-01), Kawashima et al.
Kabushiki Kaisha Kawai Gakki Seisakusho
Mason, Jr. Joseph C.
Smith Ronald E.
Witkowski Stanley J.
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