Electronic organ

Details Electronic organ Electronic organ

G - Physics

10

H

84/1.51

G10H 1/06 (2006.01) G10H 1/24 (2006.01)

Patent

CA 1036848

ELECTRONIC ORGAN ABSTRACT OF THE DISCLOSURE: An electronic organ comprises memory means for memorizing in an analog manner the synthesizing ratio of repetitively occuring waves such as square waves for synthe- sizing qualities of sound in response to the signals from means for selecting qualities of sound (to be referred to as tablets hereinafter); a mixing circuit for adding the synthe- sizing ratio for each repetitively occuring wave when the means for selecting qualities of sound are selected; frequency dividers for dividing the oscillation frequencies of top octave generators, an indirect keying circuit for interrupting the current corresponding to the ratio of repetitively occuring waves in response to the repetitively occuring signal waveforms from the frequency dividers and intermittingly interrupting said current in response to on-off signals a keyboard; a synthesizing circuit for combining the outputs from the indirect keying circuit into a group for each octave; a variable filter for changing the frequency characteristics electronically in response to the outputs from said tablets; and detectors of key number and tablet number for detecting the number of keys pressed and the number of tablets selected, respectively, for effecting the additive control of the amplitudes of the output tone signals.

221340

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