Electronic musical instrument having variable frequency dividers

Details Electronic musical instrument having variable frequency dividers Electronic musical instrument having variable frequency dividers

1983-03-29

1985-08-27

Isen, Forester W.

Music

Instruments

84DIG11, G10H 100

Patent

active

045371083

ABSTRACT:
An electronic musical instrument comprising a code generator responsive to the operation of each of the keys for generating a first code indicating a tone pitch and a second code indicating an octave associated with the operated key. A first variable frequency divider is presettable to a first count value as a function of the first code for counting master clock pulses supplied from an oscillator and generating a first divider output when the first count value is reached. A second variable frequency divider is presettable to a second count value as a function of the second code for counting the first divider output and generating a plurality of pulse trains having octave frequency relationship. A digital-to-analog converting means is provided for converting the pulse trains into an analog signal.

REFERENCES:
patent: 3842702 (1974-10-01), Tsundoo
patent: 3916322 (1975-10-01), Nelson
patent: 4016495 (1977-04-01), Machanian
patent: 4215616 (1980-08-01), Gross
patent: 4216691 (1980-08-01), Bean
patent: 4328731 (1982-05-01), Gotho et al.
Lancaster, CMOS Cookbook, 1977, pp. 288-289.

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