Music – Instruments
Patent
1983-06-02
1984-04-03
Isen, Forsester W.
Music
Instruments
84 119, 84 101, 84 113, 84 125, G10H 102
Patent
active
044400586
ABSTRACT:
An electronic musical instrument wherein purely digital techniques are utilized for generating the basic waveform train and also keying the waveform train so as to have the customary keying envelope with attack, sustain and decay portions. The wavetrain is a cyclically repeated series of four-term Blackman-Harris window functions, wherein there are preferably eight such functions in each series. A plurality of individual keying envelopes are generated by a piecewise linear technique, and these envelopes are assigned respectively to the waveforms in the series so that the relative amplitudes of the waveforms can change with time over the life of the tone. This results in modulating with time the harmonic content of the tone.
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patent: 4351219 (1982-09-01), Bass
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"Signal Processing Aspects of Computer Music: A Survey", by James Anderson Moorer, Proceedings of the IEEE, vol. 65, No. 8, Aug. 1977, 1108-1137.
"On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform", by Fredric J. Harris, Proceedings of the IEEE, vol. 66, No. 1, Jan. 1978, pp. 51-83.
"Music Synthesis Using Real Time Digital Techniques", by Harold G. Alles, Proceedings of the IEEE, vol. 68, No. 4, Apr. 1980, pp. 436-449.
Bass Steven C.
Goeddel Thomas W.
Isen Forsester W.
Kimball International Inc.
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