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!