Electronic musical instrument with key and pedal-operated volume controls

Claim 1

An electronic musical instrument comprising: a. tone generators; b. a first performance section including a first keyboard with keys, switching circuits with input and output sides associated with the respective keys in said first keyboard coupled on tHe input side to said tone generators and gating tone signals from said tone generators, and a first tone coloring circuit connected to output sides of said switching circuits, said switching circuits and first tone coloring circuit defining the output side of said section; c. a second performance section including a second keyboard with keys, touch-responsive switching circuits with input and output sides associated with respective keys in said second keyboard coupled on the input side to said tone generators and gating tone signals from said tone generators with output levels responsive to depressing forces on the keys of said second keyboard, and a second tone coloring circuit connected to the output sides of said touch-responsive switching circuits, said touch-responsive switching circuits and said second tone coloring circuit defining the output side of said section; d. an expression device connected to the output side of said first performance section and controlling levels of signals therefrom, said expression device having also an output side; e. circuit means connected to said second performance section switching circuits and leading signals from said second performance section to said output side of said expression device; f. an amplifier connected to the output side of said expression device; and, g. a speaker to convert signals from said amplifier to sounds.