D Aug Chord
How the D Aug chord is built: its notes, its interval structure, and where it fits.
The D Aug chord contains 3 notes: D – F# – A#. It belongs to the diminished & augmented family of chord qualities. Like every chord, it is defined by the distances (intervals) between its notes, not by any one instrument — which is why the same formula names the chord whether it is voiced on a fretboard, a keyboard, or a choir.