The Multiwave Guitar Synth is a guitar controlled oscillator with 3 different waveshapes; saw, triangle and square. It also has an 3-way octave control and a special ringmod setting aswell for a wide range of sound shaping.

This was the first pedal I designed that has different waveshapes other than just square waves. It uses a PLL to multiply the input frequency by 128, then a switched capacitor creates the stepped triangle wave and saw tooth outputs.