Polyphonic tone synthesizer
CA 1062515 A · Owner: Deutsch Research Laboratories · Inventors: Deutsch, Leslie J.; Deutsch, Ralph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a polyphonic electrical musical instrument waveforms, are synthesised using independant repetitive computation and data, transfer cycles. During the computation cycle a master data set is created by implementing a discrete Fourier algorithm using a stored set of harmonic coefficients which characterize the basic resultant musical tone. The computations are carried out at a fast rate nonsynchronous with any musical frequency. Provision is made for time varying the amplitudes of the computational orthogonal functions so that the musical effect of sliding formant filters is generated. Preferably, the harmonic coefficients and the orthogonal functions are stored in digital form, and the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted September 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 18, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.