A#m7b5 / Bbm7b5 Guitar Chord
A#m7b5 (also written Bbm7b5) is a minor seven flat five (half-diminished) chord. It is a minor chord with a flattened fifth plus a minor seventh, and in minor keys it often comes just before a dominant seventh chord. Its notes are A#, C#, E and G#. Below are 2 ways to play it, each with a chord diagram, tab and finger numbers.
Notes in A#m7b5 / Bbm7b5
A#m7b5 and Bbm7b5 are two names for the same chord. The notes below are spelled as A#m7b5.
| Note | Degree | Interval |
|---|---|---|
| A# | R | Root |
| C# | b3 | Minor 3rd |
| E | b5 | Diminished 5th |
| G# | b7 | Minor 7th |
Formula: 1–b3–b5–b7
A#m7b5 / Bbm7b5 chord shapes
Finger numbers: 1 index, 2 middle, 3 ring, 4 pinky. In the tab, x means don't play that string and 0 means play it open. In the diagrams the top line is the 1st (thinnest) string and the nut is on the left.
A-shape 1fr
Easiest- Tab (6th → 1st string)
- x 1 2 1 2 x
- Fingers
- – 2 3 1 4 –
E-shape 6fr
- Tab (6th → 1st string)
- 6 7 6 6 x x
- Fingers
- 1 2 1 1 – –
How to play A#m7b5 / Bbm7b5 (easiest shape)
Shape: A-shape 1fr, tab x 1 2 1 2 x (6th to 1st string).
- 1Put your index finger (1) on the 3rd string at the 1st fret.
- 2Put your middle finger (2) on the 5th string at the 1st fret.
- 3Put your ring finger (3) on the 4th string at the 2nd fret.
- 4Put your pinky (4) on the 2nd string at the 2nd fret.
- 5Don't play the 6th string.
- 6Keep the 1st string quiet: stop your strum at the 2nd string, or let a fretting finger touch it lightly.
- 7Strum down from the 5th string to the 2nd string.
A#m7b5 / Bbm7b5: common questions
- What notes are in the A#m7b5 / Bbm7b5 chord?
- A#m7b5 and Bbm7b5 are two names for the same chord. Spelled as A#m7b5, it has 4 notes: A#, C#, E and G#. Counted from the root, that is 1–b3–b5–b7.
- Is there an easier way to play A#m7b5 / Bbm7b5?
- The easiest shape on this page is "A-shape 1fr" (x 1 2 1 2 x). It needs no barre: each finger presses just one string.
Related chords
Other A#/Bb chords
Same chord type, other roots
More guitar tools
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