A Flat Half-diminished (also written G#m7b5)
Abm7b5 is made of 4 notes: Ab, Cb (B), Ebb (D) and Gb. Here it is in root position, with Ab at the bottom.
Inside Notley Piano: all the inversions of Abm7b5, fingering for both hands, a play button, and practice that helps you remember it.
| Note | Degree | Interval from Ab |
|---|---|---|
| Ab | 1 | root |
| Cb (B) | b3 | minor 3rd |
| Ebb (D) | b5 | diminished 5th |
| Gb | b7 | minor 7th |
A half-diminished chord (minor 7 flat 5) is a diminished triad with a minor 7th. It sounds moody and searching, and is the "ii" chord of a minor-key ii-V-i in jazz.