1,008 guitar chords with several shapes each, finger numbers, difficulty and real sound, in any tuning.
B♭dim (also written A♯dim) is a diminished chord made of 3 notes: B♭, D♭, F♭. It sounds tense and unstable, and you hear it in passing chords between two others, and the vii chord of a major key. It is the vii° chord of B major and turns up in 1 other key.
The library above opens on B♭dim with 14 shapes up and down the neck. Tap a shape to hear it, or play it one string at a time.
| Note | Degree | Interval from B♭ | Semitones |
|---|---|---|---|
| B♭ | 1 | root | 0 |
| D♭ | ♭3 | minor third | 3 |
| F♭ | ♭5 | diminished fifth | 6 |
Formula: 1 – ♭3 – ♭5. With the other spelling, A♯dim is A♯, C♯, E: the same sounds under different names.
xxx320x12x206786xxx(13)(14)(15)(14)xxx865xxx89x9The open position shape is the one to learn first. Once it is easy, try the shape at the 6th fret (6786xx): the same chord, higher and brighter, handy when the chords before and after it sit up the neck.
B♭dim belongs to 2 keys: vii° in B major, ii° in G♯ minor. In B major, try I–V–vi–IV: B – F♯ – G♯m – E.
B♭, D♭, F♭: the root, minor third, flat fifth.
Open position: x12x20 (low string first), rated Easy.
B♭dim has the same notes where B♭dim7 has A𝄫. B♭dim sounds tense and unstable; B♭dim7 sounds spooky and suspenseful.
No. The easiest shape is rated Easy and needs 3 fingers.