In a minuscule amount of space, the Scan & Pan provides a 4 channel mixer with voltage control of level and panning. Since the level control was already there, the "width" and "center" controls from the Harmonic Oscillator are included to allow the user to Scan across the channels, fade between them or actively mix them together. It's signal path is all discrete transistors.

14HP
50mA +12, 20mA -12