Digital tone generator for producing phase synchronized tones

Details Digital tone generator for producing phase synchronized tones Digital tone generator for producing phase synchronized tones

1998-03-16

1999-08-31

Donels, Jeffrey W.

Music

Instruments

Electrical musical tone generation

84620, G10H 118, G10H 700

Patent

active

059456205

ABSTRACT:
The present invention provides an apparatus and method for phase synchronizing tones in an electronic musical instrument. The apparatus includes a microprocessor having an input for receiving a signal representative of a selected note whereupon receipt of the signal, the microprocessor checks a set of available ranks to determine which of the available ranks is associated with the selected note. The apparatus further includes an oscillator which is established for each rank determined to be associated with the selected note such that each oscillator includes initializing parameters and initiating parameters which define the selected note and the associated rank. The apparatus also includes a plurality of tone engines for generating tones. The tone engines are coupled to each oscillator wherein the initializing parameters are transferred from each oscillator to an associated one of the plurality of tone engines and then the initiating parameters are simultaneously transferred from each oscillator to the associated tone engine. The method of the present invention includes receiving a signal representative of a selected note and monitoring a set of available ranks to determine which of the available ranks are associated with the selected note. Upon determining the rank associated with the selected note, establishing an oscillator for each such determined rank wherein the oscillator includes initializing parameters and initiating parameters for defining a tone of the selected note and the associated rank. The initializing parameters are transferred from each established oscillator to an associated tone engine for generating the tone whereafter the initiating parameters are transferred from each established oscillator to the associated tone engine.

REFERENCES:
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patent: 4177706 (1979-12-01), Greenberger
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patent: 4384504 (1983-05-01), Deforeit
patent: 4386546 (1983-06-01), Fritz et al.
patent: 4711148 (1987-12-01), Takeda et al.
patent: 5119710 (1992-06-01), Tsurumi et al.
patent: 5189238 (1993-02-01), Hayakawa
patent: 5200565 (1993-04-01), Satoshi et al.

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