Cm7♭5 on bass

C, E♭, G♭ and B♭ · half-diminished · 4 shapes

The course explains what this page shows in Lesson 13 · Sevenths.

Cm7♭5

  1. C1
  2. E♭♭3
  3. G♭♭5
  4. B♭♭7

Cm7♭5 is C, E♭, G♭ and B♭.

Cm7♭5 has four notes, and the bass has four strings to play them on. The rest of this page shows how a hand fits one to the other.

On the staff

CE♭G♭B♭

On a bass staff, Cm7♭5 is written C, E♭, G♭ and B♭.

The staff shows the notes one after the other, then together. Written this way the chord is in close position, which means each note sits as near to the one below it as the spelling allows. A guitar almost never plays a chord in close position.

Cm7♭5 under a hand

Cm7♭5root positionposition 8
8fr1♭5♭7♭3EADG
1♭5♭7♭3C2C3C4

Strummed from the lowest string to the highest, this grip sounds C, G♭, B♭ and E♭, which are the degrees 1 ♭5 ♭7 ♭3 rather than the 1 ♭3 ♭5 ♭7 of the written chord. The root is the lowest note, so this grip is in root position and sounds the way the written chord suggests.

Between the strings you sound: TTM3P4

Cm7♭5/E♭first inversionposition 10
10fr♭3♭71♭5EADG
1♭3♭7♭5C2C3C4

Strummed from the lowest string to the highest, this grip sounds E♭, B♭, C and G♭, which are the degrees ♭3 ♭7 1 ♭5 rather than the 1 ♭3 ♭5 ♭7 of the written chord. The lowest note is the ♭3 rather than the root, so this grip is in first inversion, written Cm7♭5/E♭. It has the same notes as the root-position grip, but with E♭ in the bass it sounds different.

Between the strings you sound: P5M2TT

Cm7♭5/G♭second inversionposition 1
♭51♭3♭7EADG
1♭5♭3♭7C1C2C3

Strummed from the lowest string to the highest, this grip sounds G♭, C, E♭ and B♭, which are the degrees ♭5 1 ♭3 ♭7 rather than the 1 ♭3 ♭5 ♭7 of the written chord. The lowest note is the ♭5 rather than the root, so this grip is in second inversion, written Cm7♭5/G♭. It has the same notes as the root-position grip, but with G♭ in the bass it sounds different.

Between the strings you sound: TTm3P5

Cm7♭5/B♭third inversionposition 4
4fr♭7♭3♭51EADG
1♭7♭3♭5C1C2C3

Strummed from the lowest string to the highest, this grip sounds B♭, E♭, G♭ and C, which are the degrees ♭7 ♭3 ♭5 1 rather than the 1 ♭3 ♭5 ♭7 of the written chord. The lowest note is the ♭7 rather than the root, so this grip is in third inversion, written Cm7♭5/B♭. It has the same notes as the root-position grip, but with B♭ in the bass it sounds different.

Between the strings you sound: P4m3TT

Four shapes for Cm7♭5 on bass: Cm7♭5, Cm7♭5/E♭, Cm7♭5/G♭ and Cm7♭5/B♭.

Every grip here is Cm7♭5, but no two of them sound alike. A chord with the root as its lowest note is in root position, and a chord with any other note at the bottom is an inversion. On a keyboard you choose the inversion you want, but on a neck the shape your hand can reach usually decides it for you.

C, E♭, G♭ and B♭ on the whole neck

EADG123456789101112131415♭5♭71♭3♭5♭71♭3♭5♭71♭3♭5♭71♭3♭71♭3♭5♭7

This diagram marks every C, E♭, G♭ and B♭ on the first fifteen frets of the bass.

Every grip above is a handful of the notes on this diagram, and none of them uses a note that is not shown here.

Where Cm7♭5 comes from

Cm7♭5 is a chord of D♭ major and B♭ natural minor.

A chord does not belong to a single key. Each major or natural minor key listed here contains every note of Cm7♭5, which is why the same grip turns up in songs that otherwise have little in common.