# C Minor Major 7th piano chord (CmMaj7)

CmMaj7 contains C, E♭, G and B. A minor triad with the major seventh added on top. E♭ is a black key; C, G and B are white.

- Canonical page: https://piano.org/chords/minor-major-7th/c/
- Entity: chord:minor-major-7th:c
- 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: CmMaj7, CmMaj7, 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 | C3 E♭3 G3 B3 | 7 | 11 st, 151 mm |
| First inversion (CmMaj7/E♭) | E♭ | E♭3 G3 B3 C4 | 6/5 | 9 st, 124 mm |
| Second inversion (CmMaj7/G) | G | G3 B3 C4 E♭4 | 4/3 | 8 st, 110 mm |
| Third inversion (CmMaj7/B) | B | B3 C4 E♭4 G4 | 4/2 | 8 st, 110 mm |

## Voicings (10)

| Voicing | Notes | Span | Relation | Omits or adds |
| --- | --- | --- | --- | --- |
| Close, root position | C3 E♭3 G3 B3 | 11 st, 151 mm | identical | none |
| Close, first inversion | E♭3 G3 B3 C4 | 9 st, 124 mm | identical | none |
| Close, second inversion | G3 B3 C4 E♭4 | 8 st, 110 mm | identical | none |
| Close, third inversion | B3 C4 E♭4 G4 | 8 st, 110 mm | identical | none |
| Drop 2 | G2 C3 E♭3 B3 | 16 st, 220 mm | identical | none |
| Drop 3 | E♭2 C3 G3 B3 | 20 st, 275 mm | identical | none |
| Drop 2 and 4 | C2 G2 E♭3 B3 | 23 st, 316 mm | identical | none |
| Shell, root 7 ♭3 | C2 B2 E♭3 | 15 st, 206 mm | subset | omits G |
| Guide tones, ♭3 and 7 | E♭3 B3 | 8 st, 110 mm | subset | omits C and G |
| Rootless close | E♭3 G3 B3 | 8 st, 110 mm | subset | omits C |

## One-edit neighbors

| Becomes | Edit | Changes | Common tones |
| --- | --- | --- | --- |
| Cm | 1 ♭3 5 | drops B | 3 |
| Cmaj7 | 1 3 5 7 | E♭ becomes E | 3 |
| Cm7 | 1 ♭3 5 ♭7 | B becomes B♭ | 3 |
| Cm6 | 1 ♭3 5 6 | B becomes A | 3 |
| Cmaj9 | 1 3 5 7 9 | E♭ becomes E, D | 3 |
| Cm9 | 1 ♭3 5 ♭7 9 | B becomes B♭, D | 3 |
| C | 1 3 5 | E♭, B becomes E | 2 |
| Cdim | 1 ♭3 ♭5 | G, B becomes G♭ | 2 |
| Csus2 | 1 2 5 | E♭, B becomes D | 2 |
| Csus4 | 1 4 5 | E♭, B becomes F | 2 |
| C7 | 1 3 5 ♭7 | E♭, B becomes E, B♭ | 2 |
| Cm7♭5 | 1 ♭3 ♭5 ♭7 | G, B becomes G♭, B♭ | 2 |

## Set theory

- Absolute pitch classes: {0, 3, 7, 11}
- Relative pitch classes: [0, 3, 7, 11]
- Normal order: [11, 0, 3, 7]
- Prime form: (0148)
- Forte number: 4-19
- Interval vector: <101310>

## Frequencies (close root position)

| Note | MIDI | Frequency |
| --- | --- | --- |
| C3 | 48 | 130.81 Hz |
| E♭3 | 51 | 155.56 Hz |
| G3 | 55 | 196.00 Hz |
| B3 | 59 | 246.94 Hz |

## Questions and answers

### What notes are in CmMaj7?

CmMaj7 contains C, E♭, G and B. The formula is 1, ♭3, 5, 7.

### How do you play CmMaj7 on piano?

Play C, E♭, G and B together. Right hand fingers 1, 2, 3, 5; left hand 5, 3, 2, 1. E♭ is a black key; C, G and B are white.

### What are the inversions of CmMaj7?

4 positions: root position C E♭ G B, CmMaj7/E♭, CmMaj7/G, CmMaj7/B.

### What is the difference between CmMaj7 and Cm?

Drops B. 3 of the notes are shared.

### What is an easy CmMaj7 for small hands?

The close, second inversion voicing, G3 B3 C4 E♭4, spans 8 semitones or about 110 mm.

### What are the frequencies of CmMaj7?

From C3 at A440 in 12-TET: 130.81, 155.56, 196.00, 246.94 Hz.

### What is the set class of CmMaj7?

Prime form (0148), Forte 4-19, interval vector &lt;101310&gt;.

### How do I transpose CmMaj7 to another key?

Keep the 1, ♭3, 5, 7 formula on the new root. C♯mMaj7 is C♯, E, G♯, B♯; D♭mMaj7 is D♭, F♭, A♭, C.

## 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
Last reviewed: 2026-08-12