Editor’s Note: This DI is a two-part series. Part 1 shows how to make an oscillator with a pitch that is proportional to a control voltage. Part 2 shows how to modify the circuit for use with higher ...

Inside the Theremin are a pair of circuits — one to control pitch, and the other to control volume. The pitch circuit uses two tuned oscillators to produce sound. One is fixed, and the other is ...

There are footswitches for the Octave and Fuzz, as well as two sets of control circuits that serve each ... offers a Blend control, a Pitch parameter that cycles through a +/– two octave range ...