Music – Instruments – Electrical musical tone generation
Patent
1996-05-14
1997-09-30
Wysocki, Jonathan
Music
Instruments
Electrical musical tone generation
G10H 700
Patent
active
056728360
ABSTRACT:
A method, for forming a repeated waveform that is employed for an electronic musical instrument, which includes the steps of: setting, as basic data, a loop top address, an initial value of a loop length, and a length change range; changing the loop length within the length change width; forming repeated waveforms that are obtained after cross-fading is performed in consonance with existing conditions; acquiring correlation coefficients of the repeated waveforms, which are obtained by cross-fading, and waveforms at corresponding portions of an original waveform; and selecting a predetermined number of waveforms beginning at a waveform that is most correlative to determine a repeated waveform, and an apparatus therefor. In addition, a method, for forming a waveform that is used for an electronic musical instrument, which includes the steps of: dividing the waveform into band elements for which fluctuation is to be compressed and band elements for which fluctuation is not to be compressed; analyzing, to obtain harmonic elements, the band elements for which the fluctuation is to be compressed; extracting amplitude elements and frequency elements from the harmonic elements that are acquired; compressing fluctuation of the amplitude elements and of the extracted frequency elements; and synthesizing waveform elements that are obtained by analyzing to produce new harmonic elements, and an apparatus therefor.
REFERENCES:
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patent: 5416264 (1995-05-01), Toda et al.
patent: 5430241 (1995-07-01), Furuhashi et al.
patent: 5466882 (1995-11-01), Lee
Donels Jeffrey W.
Kabushiki Kaisha Kawai Gakki Seisakusho
Wysocki Jonathan
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