pitch shifter

A pitch shifter is an effect that shifts the signal's pitch, cutting the signal into slices with an array of alternating delays and playing them back at a different speed¹. It can be used like an octave pedal but is more versatile because it can add harmonies, and many are polyphonic². Because it relies on delays, any pitch shifter always introduces a little latency to the signal¹. It has been a pedalboard staple since the '70s, used by players from Tom Morello to Jonny Greenwood³.