Electrical audio signal processing systems and devices – With musical instrument
Patent
1994-04-14
1995-05-30
Isen, Forester W.
Electrical audio signal processing systems and devices
With musical instrument
381 94, G10D 500
Patent
active
054209340
ABSTRACT:
An electronic sound processing system comprises a sound waveform looping apparatus which cuts out a portion of an input sound waveform and conducts a looping process for a predetermined cycle of the portion of the waveform. The sound waveform looping process comprises a discrete Fourier transformer for applying a discrete Fourier transform to the input sound waveform, a frequency band remover for removing a predetermined frequency band of the discrete Fourier transformed sound waveform, an inverse discrete Fourier transformer for applying an inverse discrete Fourier transform to the sound waveform from which the predetermined frequency band has been removed, and a looping processor for looping a predetermined cycle of the inverse discrete Fourier transformed sound waveform. By executing the sound waveform looping process, the electronic sound processing system can obtain smooth looped waveforms with easy processes and simple equipment.
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Partial translation of JP-03-020797, previously cited by examiner.
Isen Forester W.
Kabushiki Kaisha Kawai Gakki Seisakusho
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