# D♭ Minor Major 7th piano chord (D♭mMaj7) D♭mMaj7 contains D♭, F♭, A♭ and C. A minor triad with the major seventh added on top. D♭ and A♭ are black keys; F♭ and C are white. - Canonical page: https://piano.org/chords/minor-major-7th/d-flat/ - Entity: chord:minor-major-7th:d-flat - Notes: D♭ F♭ A♭ C - Formula: 1 ♭3 5 7 - Intervals from root: P1, m3, P5, M7 - Interval stack (semitones): 3 4 4 - Also written: D♭mMaj7, DbmMaj7, D♭ minor major 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♭ | Minor third | 3 | | 5 | A♭ | Perfect fifth | 7 | | 7 | C | Major seventh | 11 | ## 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 F♭3 A♭3 C4 | 7 | 11 st, 151 mm | | First inversion (D♭mMaj7/F♭) | F♭ | F♭3 A♭3 C4 D♭4 | 6/5 | 9 st, 124 mm | | Second inversion (D♭mMaj7/A♭) | A♭ | A♭3 C4 D♭4 F♭4 | 4/3 | 8 st, 110 mm | | Third inversion (D♭mMaj7/C) | C | C4 D♭4 F♭4 A♭4 | 4/2 | 8 st, 110 mm | ## Voicings (10) | Voicing | Notes | Span | Relation | Omits or adds | | --- | --- | --- | --- | --- | | Close, root position | D♭3 F♭3 A♭3 C4 | 11 st, 151 mm | identical | none | | Close, first inversion | F♭3 A♭3 C4 D♭4 | 9 st, 124 mm | identical | none | | Close, second inversion | A♭3 C4 D♭4 F♭4 | 8 st, 110 mm | identical | none | | Close, third inversion | C4 D♭4 F♭4 A♭4 | 8 st, 110 mm | identical | none | | Drop 2 | A♭2 D♭3 F♭3 C4 | 16 st, 220 mm | identical | none | | Drop 3 | F♭2 D♭3 A♭3 C4 | 20 st, 275 mm | identical | none | | Drop 2 and 4 | D♭2 A♭2 F♭3 C4 | 23 st, 316 mm | identical | none | | Shell, root 7 ♭3 | D♭2 C3 F♭3 | 15 st, 206 mm | subset | omits A♭ | | Guide tones, ♭3 and 7 | F♭3 C4 | 8 st, 110 mm | subset | omits D♭ and A♭ | | Rootless close | F♭3 A♭3 C4 | 8 st, 110 mm | subset | omits D♭ | ## One-edit neighbors | Becomes | Edit | Changes | Common tones | | --- | --- | --- | --- | | D♭m | 1 ♭3 5 | drops C | 3 | | D♭maj7 | 1 3 5 7 | F♭ becomes F | 3 | | D♭m7 | 1 ♭3 5 ♭7 | C becomes C♭ | 3 | | D♭m6 | 1 ♭3 5 6 | C becomes B♭ | 3 | | D♭maj9 | 1 3 5 7 9 | F♭ becomes F, E♭ | 3 | | D♭m9 | 1 ♭3 5 ♭7 9 | C becomes C♭, E♭ | 3 | | D♭ | 1 3 5 | F♭, C becomes F | 2 | | D♭dim | 1 ♭3 ♭5 | A♭, C becomes A♭♭ | 2 | | D♭sus2 | 1 2 5 | F♭, C becomes E♭ | 2 | | D♭sus4 | 1 4 5 | F♭, C becomes G♭ | 2 | | D♭7 | 1 3 5 ♭7 | F♭, C becomes F, C♭ | 2 | | D♭m7♭5 | 1 ♭3 ♭5 ♭7 | A♭, C becomes A♭♭, C♭ | 2 | ## Set theory - Absolute pitch classes: {1, 4, 8, 0} - Relative pitch classes: [0, 3, 7, 11] - Normal order: [0, 1, 4, 8] - Prime form: (0148) - Forte number: 4-19 - Interval vector: <101310> ## Frequencies (close root position) | Note | MIDI | Frequency | | --- | --- | --- | | D♭3 | 49 | 138.59 Hz | | F♭3 | 52 | 164.81 Hz | | A♭3 | 56 | 207.65 Hz | | C4 | 60 | 261.63 Hz | ## Questions and answers ### What notes are in D♭mMaj7? D♭mMaj7 contains D♭, F♭, A♭ and C. The formula is 1, ♭3, 5, 7. ### How do you play D♭mMaj7 on piano? Play D♭, F♭, A♭ and C together. Right hand fingers 2, 3, 4, 5; left hand 5, 4, 3, 2. D♭ and A♭ are black keys; F♭ and C are white. ### What are the inversions of D♭mMaj7? 4 positions: root position D♭ F♭ A♭ C, D♭mMaj7/F♭, D♭mMaj7/A♭, D♭mMaj7/C. ### What is the difference between D♭mMaj7 and D♭m? Drops C. 3 of the notes are shared. ### What is an easy D♭mMaj7 for small hands? The close, second inversion voicing, A♭3 C4 D♭4 F♭4, spans 8 semitones or about 110 mm. ### What are the frequencies of D♭mMaj7? From D♭3 at A440 in 12-TET: 138.59, 164.81, 207.65, 261.63 Hz. ### What is the set class of D♭mMaj7? Prime form (0148), Forte 4-19, interval vector <101310>. ### How do I transpose D♭mMaj7 to another key? Keep the 1, ♭3, 5, 7 formula on the new root. CmMaj7 is C, E♭, G, B; C♯mMaj7 is C♯, E, G♯, B♯. ### Is C♯mMaj7 the same as D♭mMaj7? 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:minor-major-7th:d-flat Last reviewed: 2026-08-12