The Panoptigon Chord Controller is an accessory for the Panoptigon Disc Player that provides a button array and rocker-switches for playing the chord and special effects tracks on Optigan discs. Additionally it offers sustained chord accompaniment when playing Orchestron and Panoptigon discs by sending the appropriate notes over MIDI. There is even a mode for playing the chord tracks in the iOptigan app for the iPhone or iPad (requires an additional 3rd party MIDI to Lightning interface). It also can be connected to a MIDI sound module to add chord accompaniment!