octave

An octave is a pitch interval of eight notes, and in effects pedals it refers to circuitry that generates tones one octave above or below the played note¹². Octave effects can add a bass guitar-type element below normal playing or a high-pitched frequency an octave above it¹. Polyphonic octave algorithms can track single notes and chords with fast tracking and distinct tone³⁴. Octave up or octave down tones also appear combined with fuzz and distortion, as in octave fuzz designs⁵⁶⁷.