Build your own chords and extensions

Every chord and extension button is editable on a keyboard, up to five notes, named automatically.

The chord buttons ship as major, minor, suspended, and diminished, with 6th, dominant 7th, major 7th, and 9th extensions — four of each. All of them are editable. Open the keyboard’s settings sheet and choose Chords or Extensions, then tap the button you want to change.

Editing a chord

You get a keyboard for the slot. Tap notes on and off to build the voicing.

  • The root is always on and cannot be tapped off.
  • Build all chords in the key of C. Transposition happens automatically on the keyboard, not in the chord builder.
  • A chord holds up to five notes. At five the board dims as one piece and no sixth will land. Remove one and there is room again.
  • The confirm button is disabled for a chord of one note — a single note is not a chord — and enabled for anything else.
  • Cancel discards. Re-opening the editor shows the stored slot, not the draft you abandoned.

Editing an extension

An extension is exactly one note, always. The note that is currently on cannot be tapped off; tap a different note and it moves there.

Resetting

Each section has its own Reset to defaults, which appears only while that section has been changed, and clears only that section. The app’s Reset user preferences clears both.

Your edits survive a relaunch. If one of the two lists ever becomes unreadable, it falls back to its own defaults without taking the other section with it.

With VoiceOver

The editor keyboard is announced in pitch order — C, C♯, D — with each key’s degree name and its on/off state. The locked root and any blocked keys read as dimmed, and each Reset button says which section it resets.

Related

Applies to

Last updated 2026-09-17. Something wrong or missing? Tell me.

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