Method for removing aliasing in wave table based synthesizers

Details Method for removing aliasing in wave table based synthesizers Method for removing aliasing in wave table based synthesizers

2005-05-31

2005-05-31

Fletcher, Marlon (Department: 2837)

Music

Instruments

Electrical musical tone generation

C084S602000, C084S609000, C084S622000, C708S315000, C708S420000

Reexamination Certificate

active

06900381

ABSTRACT:
A method and apparatus are provided for changing the pitch of a tabulated waveform in wavetable based synthesizers. Harmonics that normally would be aliased before a transposition process are removed by a discrete time low pass filter at the same time that the tabulated waveform is reconstruction and resampling.

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patent: 5814750 (1998-09-01), Wang et al.
D.C. Massie, “Wavetable Sampling Synthesis,”Applications of Digital Signal Processing To Audio and Acoustics, M. Kahrs et al. editors, Kluwer Academic Publishers, Boston/Dordrecht/London, 1998, pp. 311-341.

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