The D diminished seventh chord, abbreviated as Ddim7 or D°7, is a four-note chord consisting of the notes D, F, A♭, and C♭. This chord is constructed by stacking four minor thirds (three semitones) on top of each other, resulting in intervals of a minor third between each note. The diminished seventh interval (C♭ to D) is enharmonic to a major sixth, giving the chord its symmetrical and dissonant quality. Due to its symmetrical structure, the Ddim7 chord can be transposed to any other diminished seventh chord by moving the shape up or down the fretboard, making it a versatile choice for modulation and tension-building in various musical genres. On the guitar, the Ddim7 chord can be played in several positions, with one common voicing being xx0101. Its unique sound and adaptability make it a valuable addition to a musician’s chord repertoire.
Name: D diminished seventh chord
Symnonyms:: D fully diminished chord
Notes: D, F, A♭, C♭
Intervals: 1, ♭3, ♭5, 𝄫7
Chord symbol: Do7
Alternative symbols: Ddim7, Ddim, Do
Type: Tetrad (four-note chord)
D diminished seventh chord on the Staff
D diminished seventh chord on Piano
D diminished seventh chord on Guitar
D diminished seventh chord on Ukulele
Rowan Ellis is a musician and educator with a passion for exploring the language of harmony and melody. With years of experience across classical, jazz, and contemporary styles, Rowan breaks down music theory into clear, practical insights. His goal is to make chords and scales less intimidating and more inspiring for every musician.