Abstract An electronic musical instrument capable of transposition and in which a high-frequency oscillator is provided on its output side with an octave frequency divider comprising 12 counter circuits to produce twelve tone signals based on a 12 tempered scale. These tone signals are respectively frequency divided by respective counter circuits to obtain a plurality of octave tone signals. An AND-gate circuit is interposed between the highfrequency oscillator and the octave frequency divider. A pulsecounter circuit for counting output pulses of the high-frequency oscillator is provided so that a pulse of the first order and pulses of proper orders other than the first order are taken out at the output side of the pulse-counter circuit. The AND-gate circuit is opened by the pulse of the first order and is closed by a pulse of one of the proper orders. The pulse-counter circuit is reset by a pulse of the last of the proper orders.
An electronic musical instrument comprising a high-frequency oscillator, an octave frequency divider, and adjustable means passing a selected number of pulses from said oscillator and then blocking a selected number of pulses from said oscillator; said means including a gating circuit between said oscillator and octave frequency divider and a flip-flop controlling said gating circuit; said flip-flop including set and reset terminals, said adjustable means further comprising a counter coupled to said oscillator, first and second pluralities of gates coupled to said counter, and first and second selector switches respectively coupled to said pluralities of gates, one of said switches being coupled to the reset terminal of the flip-flop, the other of said switches being coupled to said counter to reset the same, said adjustable means further including a gate coupling said counter to the set terminal of said flip-flop.
Claim 2
Dependent Claim
140 words
An electronic musical instrument comprising a high-frequency oscillator, an octave frequency divider, and adjustable means passing a selected number of pulses from said oscillator and then blocking a selected number of pulses from said oscillator; said means including a gating circuit between said oscillator and octave frequency divider and a flip-flop controlling said gating circuit; said flip-flop including set and reset terminals, said adjustable means further comprising a counter coupled to said oscillator, first and second pluralities of gates coupled to said counter, and first and second selector switches respectively coupled to said pluralities of gates, one of said switches being coupled to the reset terminal of the flip-flop, the other of said switches being coupled to said counter to reset the same, said adjustable means further including a gate coupling said counter to the set terminal of said flip-flop.
Claim 3
Dependent Claim
35 words
An instrument as claimed in claim 1, wherein the later said gate is coupled to the counter to set said flip-flop before the flip-flop and counter are reset, the flip-flop being reset before the counter.