Tone generating apparatus producing smoothly linked waveforms

Details Tone generating apparatus producing smoothly linked waveforms Tone generating apparatus producing smoothly linked waveforms

1993-06-21

1994-06-28

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84627, 84DIG9, G10H 1057, G10H 700

Patent

active

053248821

ABSTRACT:
A tone generating apparatus that employs a read-out system comprises a waveform memory wherein are stored, as waveform data for a transient portion, waveform data that have a weighted attenuation characteristic and that are stored at a predetermined interval within a stationary portion following a rising portion of the musical tone, and waveform data that are obtained by extracting and linking multiple sets of the waveform data at the predetermined interval within a stationary portion, by filtering the resultant waveform data by employing a filtering process that does not alter phase information, by extracting from filtered waveform data waveform data for an interval equivalent to the predetermined interval, by linking together the extracted waveform data in numbers equivalent to the number of waveforms included in the predetermined interval, and by weighting the resultant waveform data with a rising characteristic; and wherein are further stored, as waveform data for a repetitive portion, the filtered waveform data.

REFERENCES:
patent: 5086475 (1992-01-01), Kutaragi et al.
patent: 5185491 (1993-02-01), Izumisawa et al.
patent: 5194681 (1993-03-01), Kudo
patent: 5196639 (1993-03-01), Lee et al.

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