This circuit takes a continuously variable dc voltage and outputs only voltages related to each other musically, using the 1v/octave standard. It utilizes a pre-programmed PIC which is included with purchase of a PCB. It is has a very low parts count, requires no calibration, and is small enough to be used either as a separate synth module or as a daughter board to be attached to the input of an oscillator or output of a sequencer/s&h/other CV generator.