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US 4,062,264 AGranted
Polyphonic musical instrument simulator
OwnerWillis E. Chaseinventor
Life of this patent
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Abstract
An electronic musical instrument having a plurality of frequency sources driving a plurality of waveshape controlling circuits rendered operative by a plurality of keyswitches comprising a keyboard to produce polyphonically, organ voices, piano and harpsichord voices, accordian voices, and other voices characterized by changing harmonic structure as the key is held down.
Claims13
An electronic musical instrument for obtaining certain musical effects comprising in combination:
- a plurality of frequency sources supplying rectangular waves continuously at a given rate, each of which corresponds to a semitone of the musical scale;
- a plurality of key switching means;
- a plurality of waveshape controlling means, each of which is connected to a corresponding one of said frequency sources, and each of which has a minimum of two outputs;
- a first of said outputs producing a waveshape having a plurality of selected harmonics and rendered operative by one of said plurality of key switching means and;
- a second of said outputs producing a waveshape having a plurality of selected harmonics and rendered operative by the same said one of said keyswitches but the amplitude of said waveshape being controlled by said waveshape controlling means while said keyswitch is rendering it operative for the purpose of obtaining certain musical effects;
- filter means responsive to each output for adjusting the amplitudes of said harmonics to conform to the desired timber of said organ tone, and also of said musical effects and;
- signal translating means responsive to the output of each filter means to produce audible musical tones.
4 more elements
Dependencies are inferred from the claim text.