polyphonic

Polyphonic describes effects that process multiple notes or full chords at once, rather than only single notes. In pitch-based pedals it matters because tracking chords accurately is difficult; the POG3's polyphonic octave algorithm is described as reproducing single notes and chords with clarity and fast tracking¹, and Boss says its XS series gives balanced polyphonic performance across playing styles, pickups, and pedal setups, with complex chords reproduced clearly². The term also appears in octave pedals³, pitch transposers⁴, reverb modes that apply pitch shifts to the reverb tail⁵, and an amplitude synthesizer that alters attack and decay⁶. DigiTech's Polyphonic Detuner uses the approach to thicken bass tone without a chorus pedal⁷.