Octave stompbox pedal from Boss, the OC-3 gives a great range of options for layering your sound with different octaves. Knob one sets the level of your direct unaltered tone, knob two controls your first octave level, so you can set this back in the mix a little if you like or have it all the way out in front. Control knob 3 can control one of three parameters. Firstly, the amount of drive that is put on the Octave signal, secondly it can be put in a second octave mode giving you a three way octave signal and thirdly to set the range of the Polyphonic octave mode.

The polyphonic octave mode allows you to change the range within which the notes are playing. A pedal stompbox offering up great versatility and a solid build quality.