Harmonic Decoder

Phase Lock Loop

A simplified, and inexpensive Phase Lock Loop module featuring only an Input, Output and a single Modulation Input, combined with a Frequency knob to control the locking frequency and a Depth knob to provide attenuation to the Modulation input (which modulates the frequency). Sensitive to both amplitude and wave shape on the input for various effects and degrees of locking. The modulation input responds only to positive voltages, negative voltages are ignored.

http://sunsineaudio.bigcartel.com/product/harmonic-decoder-eurorack