Harmonic interpolation for producing time variant tones in an el

Details Harmonic interpolation for producing time variant tones in an el Harmonic interpolation for producing time variant tones in an el

1985-10-25

1987-07-07

Witkowski, S. J.

Music

Instruments

84 122, 84 123, G10H 106, G10H 700

Patent

active

046778896

ABSTRACT:
A keyboard operated electronic musical instrument is disclosed which has a number of tone generators that are assigned to actuated keyswitches. Musical tones are produced by computing a master data set from an interpolated sequence of harmonic coefficient values. The master data set points are read out sequentially and repetitively from a memory and converted into an audible tone. A plurality of harmonic coefficient memories are used to store preselected sets of harmonic coefficients. In response to a timing clock, the harmonic coefficients from a cyclically chosen pair of harmonic coefficient memories are selected. A tone having a time variant spectra is produced by using a time variant interpolation between the selected pair of harmonic coefficients.

REFERENCES:
patent: 4205575 (1980-06-01), Hoskinson et al.
patent: 4246823 (1981-01-01), Wachi et al.
patent: 4269101 (1981-05-01), Deutsch et al.
patent: 4344343 (1982-08-01), Deforeit

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