1,008 guitar chords with several shapes each, finger numbers, difficulty and real sound, in any tuning.
B♭dim7 (also written A♯dim7) is a diminished seventh chord made of 4 notes: B♭, D♭, F♭, A𝄫. It sounds spooky and suspenseful, and you hear it in passing chords, old film scores and dramatic moments; any note of it can be the root.
The library above opens on B♭dim7 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 |
| A𝄫 | 𝄫7 | diminished seventh | 9 |
Formula: 1 – ♭3 – ♭5 – 𝄫7. With the other spelling, A♯dim7 is A♯, C♯, E, G: the same sounds under different names.
x120206756xxxx8989x(13)(14)(12)(14)x645050x(13)(11)0(11)0The open position shape is the one to learn first. Once it is easy, try the shape at the 5th fret (6756xx): the same chord, higher and brighter, handy when the chords before and after it sit up the neck.
B♭dim7 is not built from one major or minor scale, so it works as a colour or passing chord. Passing chords, old film scores and dramatic moments; any note of it can be the root.
B♭, D♭, F♭, A𝄫: the root, minor third, flat fifth, diminished seventh.
Open position: x12020 (low string first), rated Beginner.
B♭dim7 has A𝄫. B♭dim7 sounds spooky and suspenseful; B♭dim sounds tense and unstable.
No. The easiest shape is rated Beginner and needs 3 fingers.