Electronic piano circuit arrangement
First Claim
Patent Images
1. In an electronic piano circuit the combination comprising:
- multifrequency generator means for providing the fundamental and harmonic frequencies for each of the notes of a piano keyboard, a matrix array having a first group of lines to receive each of the fundamental and harmonic frequencies of the notes and said piano keyboard, said matrix array having a second group of lines, key switch means associated with a piano keyboard and coupled to said second group of lines, said second group of lines including means to transfer said fundamental frequency and a predetermined number of harmonic frequencies by the actuation of a single key switch of said key switch means, and resistor-diode coupling means between selected ones of said first and second groups of lines, the resistance value of each of said resistor-diode coupling means being selected to transfer different amplitude values of said fundamental and harmonic frequencies, whereby combining of the different values of the fundamental and harmonic frequencies will produce an apparent authentic piano sound.
5 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is an electronic piano circuit arrangement which combines a multitude of different frequencies within a resistordiode matrix array. The resistor-diode coupling elements provide a different value impedance for various signals to be combined and the amplitude of the signals are predetermined to electronically produce a piano sound which substantially corresponds to the sound of an actual piano tone.
19 Citations
7 Claims
-
1. In an electronic piano circuit the combination comprising:
- multifrequency generator means for providing the fundamental and harmonic frequencies for each of the notes of a piano keyboard, a matrix array having a first group of lines to receive each of the fundamental and harmonic frequencies of the notes and said piano keyboard, said matrix array having a second group of lines, key switch means associated with a piano keyboard and coupled to said second group of lines, said second group of lines including means to transfer said fundamental frequency and a predetermined number of harmonic frequencies by the actuation of a single key switch of said key switch means, and resistor-diode coupling means between selected ones of said first and second groups of lines, the resistance value of each of said resistor-diode coupling means being selected to transfer different amplitude values of said fundamental and harmonic frequencies, whereby combining of the different values of the fundamental and harmonic frequencies will produce an apparent authentic piano sound.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification