I figured it out by ear in several songs, looks like a dim chord but with a slightly higher last note but cannot put a name on it.

I'm calling it "dim+" for my personal notes, but I'd like to know the official name.

5 Answers 5


This is a C half diminished 7 chord:

enter image description here

The scale that typically pairs with this half diminished chord is the locrian scale. For example, C half diminished 7 (usually notated C min 7 ♭5 or Cø7) would be played with the C locrian scale:

enter image description here

The locrian mode is the seventh mode of the major scale, and thus C locrian has all the same notes as the D♭ major scale, as can be seen above. There are other scales that work with half diminished chord, but the locrian scale is a good start. C half diminished can resolve to D♭ maj, or it can be part of a "minor ii-V-i progression," such as Cø7 - F7♯9 - B♭ minor. There are other functions for this chord, but these are two big ones.


That would likely be D♯m6, third inversion, with the notes as you've written them.

Or, if the tonic here is definitely C, it would be C1/2dim7, but the notes would be C E♭ G♭ B♭. Also known as the Tristan chord.

  • He's not spelling it any way really, is he. Just fret-counting. Though it's interesting to note that a half-dim7 (often written as m7b5) has the same pitches as a m6 chord. (That's a minor triad plus a major 6th, not a major triad plus a minor 6th. Don't argue, that's just the slightly illogical way it's named.)
    – Laurence
    Commented Jul 2, 2017 at 22:23

It's a C half diminished 7th chord. I often spell it as C-E♭-G♭-B♭, but your spelling at least gets the notes right.


In jazz chord/scale theory, this chord is a C half-diminished chord, and is the sixth mode of E♭ jazz minor (melodic minor ascending and descending), the scale itself being called the half-diminished scale.


It is C #6sus#2#4no5

I identify chords with my brain

  • Do you think this is a better answer than "C half-diminished seventh"?
    – Richard
    Commented Nov 22, 2018 at 18:39
  • Yes, I know how to identify chords with my brain
    – Alex G-I
    Commented Nov 22, 2018 at 18:45
  • I'm fascinated. Exactly how do you do this?
    – Tim
    Commented Nov 22, 2018 at 19:04
  • I think about what is the chord
    – Alex G-I
    Commented Nov 22, 2018 at 19:09
  • 1
    since the time I asked the question, I have taken jazz lessons and it's definitely half-diminished, not C#6 whatever. Commented Nov 22, 2018 at 19:56

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.