TET Music | Apollo Chord Designer Features

  • Latest news | May 2019 - Pulse Controller software has been updated. Please contact us for download.
  • Latest news | July 2019 - Apollo Chord Designer now available.
  • Latest news | July 2019 - Scale Fold Max For Live device now available.
  • Latest news | April 2019 - Portamentos Max For Live device now available.

If you snoozed through music theory classes, then this MIDI effect device is for you. Use preset chords or create custom ones, pluck notes of the chord manually, and use 3 octaves of "free play" keys to always play in key. Can be used with or without controller. Includes mapping profiles for grid controllers, and ability to create your own mappings to work with any other controller.


  • 32 chord slots - use preset chords or create your own.
  • change chord type, inversion, add bass notes, spread, and change octave.
  • when creating custom chords, keyboard will highlight notes in the selected key and scale
  • copy and paste settings from one chord slot to another
  • 3 octaves of "free play" keys for playing melodies on top of chords, in the selected key and scale
  • 8 additional triggers for plucking notes of the active chord
  • strum option for adding strumming motions to the chords
  • use with Push, Launchpad, or create a custom mapping for any other MIDI controller
  • chord slots can also be triggered with the mouse