Title :
FFT multi-frequency synthesizer
Author :
Tabei, Makoto ; Ueda, Mitsuhiro
Author_Institution :
Res. Lab. of Precision & Machinery & Electron., Tokyo Inst. of Tech., Yokohama, Japan
Abstract :
An fast-Fourier-transform (FFT)-based procedure which synthesizes the waveform directly from the set of spectral components is presented. A Gaussian window function is introduced to deal with noninteger frequencies. There exists an optimal condition for the width of the window which minimizes the numerical error. Techniques for the generation of linear envelope, decay, and frequency modulation are presented. Numerical results verify the validity of this procedure
Keywords :
electronic music; fast Fourier transforms; frequency synthesizers; FFT multifrequency synthesizer; Gaussian window function; decay; frequency modulation; linear envelope; music sound synthesis; noninteger frequencies; numerical error; spectral components; Discrete Fourier transforms; Fast Fourier transforms; Fourier transforms; Frequency modulation; Frequency synthesizers; Gaussian distribution; Laboratories; Roundoff errors; Signal processing; Signal synthesis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.196868
