program change

A program change (PC) is a MIDI message that tells a digital pedal to switch from one preset to another¹. It is used to recall saved presets on MIDI-capable pedals, such as the 128 preset slots on the Source Audio Encounter, which are accessed with MIDI Program Change messages². Program change messages can be sent by controllers and switchers, like the One Control Crocodile Tail Loop OC10, which sends them to pedals that support MIDI³, or by a DAW over USB, as on the Source Audio EQ2⁴. Some pedals, such as the Meris Polymoon, hide internal presets that can only be reached by sending the pedal MIDI Program Change messages⁵.