B Diminished 7th
Bdim7 is made of 4 notes: B, D, F and Ab. Here it is in root position, with B at the bottom.
Inside Notley Piano: all the inversions of Bdim7, fingering for both hands, a play button, and practice that helps you remember it.
| Note | Degree | Interval from B |
|---|---|---|
| B | 1 | root |
| D | b3 | minor 3rd |
| F | b5 | diminished 5th |
| Ab | bb7 | diminished 7th |
A diminished 7th chord stacks three minor 3rds. It sounds dramatic and spooky, and every note is the same distance apart, so the same shape repeats every three frets.