# C♭ Minor Major 7th piano chord (C♭mMaj7) C♭mMaj7 contains C♭, E♭♭, G♭ and B♭. A minor triad with the major seventh added on top. G♭ and B♭ are black keys; C♭ and E♭♭ are white. - Canonical page: https://piano.org/chords/minor-major-7th/c-flat/ - Entity: chord:minor-major-7th:c-flat - Notes: C♭ E♭♭ G♭ B♭ - Formula: 1 ♭3 5 7 - Intervals from root: P1, m3, P5, M7 - Interval stack (semitones): 3 4 4 - Also written: C♭mMaj7, CbmMaj7, C♭ minor major 7th - Parameters: A440, 12-TET, 165 mm octave, spans centre to centre ## Construction | Degree | Note | Interval from root | Semitones | | --- | --- | --- | --- | | 1 | C♭ | Perfect unison | 0 | | ♭3 | E♭♭ | Minor third | 3 | | 5 | G♭ | Perfect fifth | 7 | | 7 | B♭ | Major seventh | 11 | ## Fingering Rest your right hand over the notes with finger 1 on C♭, finger 2 on E♭♭, finger 3 on G♭, finger 5 on B♭. The left hand mirrors it. Right hand 1-2-3-5, left hand 5-3-2-1. Source: piano.org fingering method v1. ## Inversions | Position | Bass | Notes in order | Figured bass | Span | | --- | --- | --- | --- | --- | | Root position | C♭ | C♭3 E♭♭4 G♭4 B♭4 | 7 | 11 st, 151 mm | | First inversion (C♭mMaj7/E♭♭) | E♭♭ | E♭♭4 G♭4 B♭4 C♭4 | 6/5 | 9 st, 124 mm | | Second inversion (C♭mMaj7/G♭) | G♭ | G♭4 B♭4 C♭4 E♭♭5 | 4/3 | 8 st, 110 mm | | Third inversion (C♭mMaj7/B♭) | B♭ | B♭4 C♭4 E♭♭5 G♭5 | 4/2 | 8 st, 110 mm | ## Voicings (10) | Voicing | Notes | Span | Relation | Omits or adds | | --- | --- | --- | --- | --- | | Close, root position | C♭3 E♭♭4 G♭4 B♭4 | 11 st, 151 mm | identical | none | | Close, first inversion | E♭♭4 G♭4 B♭4 C♭4 | 9 st, 124 mm | identical | none | | Close, second inversion | G♭4 B♭4 C♭4 E♭♭5 | 8 st, 110 mm | identical | none | | Close, third inversion | B♭4 C♭4 E♭♭5 G♭5 | 8 st, 110 mm | identical | none | | Drop 2 | G♭3 C♭3 E♭♭4 B♭4 | 16 st, 220 mm | identical | none | | Drop 3 | E♭♭3 C♭3 G♭4 B♭4 | 20 st, 275 mm | identical | none | | Drop 2 and 4 | C♭2 G♭3 E♭♭4 B♭4 | 23 st, 316 mm | identical | none | | Shell, root 7 ♭3 | C♭2 B♭3 E♭♭4 | 15 st, 206 mm | subset | omits G♭ | | Guide tones, ♭3 and 7 | E♭♭4 B♭4 | 8 st, 110 mm | subset | omits C♭ and G♭ | | Rootless close | E♭♭4 G♭4 B♭4 | 8 st, 110 mm | subset | omits C♭ | ## One-edit neighbors | Becomes | Edit | Changes | Common tones | | --- | --- | --- | --- | | C♭m | 1 ♭3 5 | drops B♭ | 3 | | C♭maj7 | 1 3 5 7 | E♭♭ becomes E♭ | 3 | | C♭m7 | 1 ♭3 5 ♭7 | B♭ becomes B♭♭ | 3 | | C♭m6 | 1 ♭3 5 6 | B♭ becomes A♭ | 3 | | C♭maj9 | 1 3 5 7 9 | E♭♭ becomes E♭, D♭ | 3 | | C♭m9 | 1 ♭3 5 ♭7 9 | B♭ becomes B♭♭, D♭ | 3 | | C♭ | 1 3 5 | E♭♭, B♭ becomes E♭ | 2 | | C♭dim | 1 ♭3 ♭5 | G♭, B♭ becomes G♭♭ | 2 | | C♭sus2 | 1 2 5 | E♭♭, B♭ becomes D♭ | 2 | | C♭sus4 | 1 4 5 | E♭♭, B♭ becomes F♭ | 2 | | C♭7 | 1 3 5 ♭7 | E♭♭, B♭ becomes E♭, B♭♭ | 2 | | C♭m7♭5 | 1 ♭3 ♭5 ♭7 | G♭, B♭ becomes G♭♭, B♭♭ | 2 | ## Set theory - Absolute pitch classes: {11, 2, 6, 10} - Relative pitch classes: [0, 3, 7, 11] - Normal order: [10, 11, 2, 6] - Prime form: (0148) - Forte number: 4-19 - Interval vector: <101310> ## Frequencies (close root position) | Note | MIDI | Frequency | | --- | --- | --- | | C♭3 | 59 | 246.94 Hz | | E♭♭4 | 62 | 293.66 Hz | | G♭4 | 66 | 369.99 Hz | | B♭4 | 70 | 466.16 Hz | ## Questions and answers ### What notes are in C♭mMaj7? C♭mMaj7 contains C♭, E♭♭, G♭ and B♭. The formula is 1, ♭3, 5, 7. ### How do you play C♭mMaj7 on piano? Play C♭, E♭♭, G♭ and B♭ together. Right hand fingers 1, 2, 3, 5; left hand 5, 3, 2, 1. G♭ and B♭ are black keys; C♭ and E♭♭ are white. ### What are the inversions of C♭mMaj7? 4 positions: root position C♭ E♭♭ G♭ B♭, C♭mMaj7/E♭♭, C♭mMaj7/G♭, C♭mMaj7/B♭. ### What is the difference between C♭mMaj7 and C♭m? Drops B♭. 3 of the notes are shared. ### What is an easy C♭mMaj7 for small hands? The close, second inversion voicing, G♭4 B♭4 C♭4 E♭♭5, spans 8 semitones or about 110 mm. ### What are the frequencies of C♭mMaj7? From C♭3 at A440 in 12-TET: 246.94, 293.66, 369.99, 466.16 Hz. ### What is the set class of C♭mMaj7? Prime form (0148), Forte 4-19, interval vector <101310>. ### How do I transpose C♭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 BmMaj7 the same as C♭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:c-flat Last reviewed: 2026-08-12