Musical tone generating apparatus, musical tone generating...

Details Musical tone generating apparatus, musical tone generating... Musical tone generating apparatus, musical tone generating...

2005-03-15

2005-03-15

Donels, Jeffrey W (Department: 2837)

Music

Instruments

Electrical musical tone generation

Reexamination Certificate

active

06867356

ABSTRACT:
There is provided a musical tone generating apparatus that is capable of generating more natural musical tones even when musical tone waveform data is generated at a recording sampling frequency lower than a sampling frequency, by recovering harmonic components missing in the musical tone waveform data. All frequency components included in musical tone waveform data read out from a tone color data memory are shifted in a positive direction by a predetermined frequency lower than half the recording sampling frequency. The lower frequency components of the shifted frequency components than the half the recording sampling frequency are cut off by an HPF. The amplitude of the musical tone waveform data from which the frequency component is cut off is adjusted by a multiplier. Then, the musical tone waveform data adjusted in amplitude and the original musical tone waveform data read out are added together, and a musical tone is generated based on a result of the addition.

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patent: 5754666 (1998-05-01), Nakagawa
patent: 5850049 (1998-12-01), Kamiya
patent: 5872727 (1999-02-01), Kuo
patent: 5969282 (1999-10-01), Berners et al.
patent: 63-219631 (1988-09-01), None

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