# D♭ Augmented 7th piano chord (D♭aug7) D♭aug7 contains D♭, F, A and C♭. An augmented triad with the minor seventh added on top. D♭ is a black key; F, A and C♭ are white. - Canonical page: https://piano.org/chords/augmented-7th/d-flat/ - Entity: chord:augmented-7th:d-flat - Notes: D♭ F A C♭ - Formula: 1 3 ♯5 ♭7 - Intervals from root: P1, M3, m6, m7 - Interval stack (semitones): 4 4 2 - Also written: D♭aug7, Dbaug7, D♭ augmented 7th - Parameters: A440, 12-TET, 165 mm octave, spans centre to centre ## Construction | Degree | Note | Interval from root | Semitones | | --- | --- | --- | --- | | 1 | D♭ | Perfect unison | 0 | | 3 | F | Major third | 4 | | ♯5 | A | Minor sixth | 8 | | ♭7 | C♭ | Minor seventh | 10 | ## Fingering Rest your right hand over the notes with finger 2 on D♭, finger 3 on F, finger 4 on A, finger 5 on C♭. The left hand mirrors it. Right hand 2-3-4-5, left hand 5-4-3-2. Source: piano.org fingering method v1. ## Inversions | Position | Bass | Notes in order | Figured bass | Span | | --- | --- | --- | --- | --- | | Root position | D♭ | D♭3 F3 A3 C♭3 | 7 | 10 st, 138 mm | | First inversion (D♭aug7/F) | F | F3 A3 C♭3 D♭4 | 6/5 | 8 st, 110 mm | | Second inversion (D♭aug7/A) | A | A3 C♭3 D♭4 F4 | 4/3 | 8 st, 110 mm | | Third inversion (D♭aug7/C♭) | C♭ | C♭3 D♭4 F4 A4 | 4/2 | 10 st, 138 mm | ## Voicings (10) | Voicing | Notes | Span | Relation | Omits or adds | | --- | --- | --- | --- | --- | | Close, root position | D♭3 F3 A3 C♭3 | 10 st, 138 mm | identical | none | | Close, first inversion | F3 A3 C♭3 D♭4 | 8 st, 110 mm | identical | none | | Close, second inversion | A3 C♭3 D♭4 F4 | 8 st, 110 mm | identical | none | | Close, third inversion | C♭3 D♭4 F4 A4 | 10 st, 138 mm | identical | none | | Drop 2 | A2 D♭3 F3 C♭3 | 14 st, 193 mm | identical | none | | Drop 3 | F2 D♭3 A3 C♭3 | 18 st, 248 mm | identical | none | | Drop 2 and 4 | D♭2 A2 F3 C♭3 | 22 st, 303 mm | identical | none | | Shell, root ♭7 3 | D♭2 C♭2 F3 | 16 st, 220 mm | subset | omits A | | Guide tones, 3 and ♭7 | F3 C♭3 | 6 st, 83 mm | subset | omits D♭ and A | | Rootless close | F3 A3 C♭3 | 6 st, 83 mm | subset | omits D♭ | ## One-edit neighbors | Becomes | Edit | Changes | Common tones | | --- | --- | --- | --- | | D♭aug | 1 3 ♯5 | drops C♭ | 3 | | D♭7 | 1 3 5 ♭7 | A becomes A♭ | 3 | | D♭9 | 1 3 5 ♭7 9 | A becomes A♭, E♭ | 3 | | D♭ | 1 3 5 | A, C♭ becomes A♭ | 2 | | D♭maj7 | 1 3 5 7 | A, C♭ becomes A♭, C | 2 | | D♭m7 | 1 ♭3 5 ♭7 | F, A becomes F♭, A♭ | 2 | | D♭m7♭5 | 1 ♭3 ♭5 ♭7 | F, A becomes F♭, A♭♭ | 2 | | D♭7sus4 | 1 4 5 ♭7 | F, A becomes G♭, A♭ | 2 | | D♭6 | 1 3 5 6 | A, C♭ becomes A♭, B♭ | 2 | | D♭add9 | 1 3 5 9 | A, C♭ becomes A♭, E♭ | 2 | ## Set theory - Absolute pitch classes: {1, 5, 9, 11} - Relative pitch classes: [0, 4, 8, 10] - Normal order: [9, 11, 1, 5] - Prime form: (0248) - Forte number: 4-24 - Interval vector: <020301> ## Frequencies (close root position) | Note | MIDI | Frequency | | --- | --- | --- | | D♭3 | 49 | 138.59 Hz | | F3 | 53 | 174.61 Hz | | A3 | 57 | 220.00 Hz | | C♭3 | 59 | 246.94 Hz | ## Questions and answers ### What notes are in D♭aug7? D♭aug7 contains D♭, F, A and C♭. The formula is 1, 3, ♯5, ♭7. ### How do you play D♭aug7 on piano? Play D♭, F, A and C♭ together. Right hand fingers 2, 3, 4, 5; left hand 5, 4, 3, 2. D♭ is a black key; F, A and C♭ are white. ### What are the inversions of D♭aug7? 4 positions: root position D♭ F A C♭, D♭aug7/F, D♭aug7/A, D♭aug7/C♭. ### What is the difference between D♭aug7 and D♭aug? Drops C♭. 3 of the notes are shared. ### What is an easy D♭aug7 for small hands? The guide tones, 3 and ♭7 voicing, F3 C♭3, spans 6 semitones or about 83 mm. ### What are the frequencies of D♭aug7? From D♭3 at A440 in 12-TET: 138.59, 174.61, 220.00, 246.94 Hz. ### What is the set class of D♭aug7? Prime form (0248), Forte 4-24, interval vector <020301>. ### How do I transpose D♭aug7 to another key? Keep the 1, 3, ♯5, ♭7 formula on the new root. Caug7 is C, E, G♯, B♭; Daug7 is D, F♯, A♯, C. ### Is C♯aug7 the same as D♭aug7? Enharmonically yes: the same piano keys and the same sound, spelled differently. ## Provenance Every derived value above is computed by the piano.org theory kernel from the root, the quality and the stated parameters. Nothing is hand-entered per chord. Machine record: https://piano.org/api/knowledge/v1/entities/chord:augmented-7th:d-flat Last reviewed: 2026-08-12