Bbm7b5 chord (B flat half-diminished seventh) on piano
Bbm7b5 (B flat half-diminished seventh) has four notes: B flat, D flat, F flat and A flat. Its formula is 1, b3, b5, b7. In major keys, Bbm7b5 is the viiø7 chord in B major.
Bbm7b5 inversions and fingering
Bb Db Fb Ab · RH 1-2-3-5 · LH 5-3-2-1
Db Fb Ab Bb · RH 1-2-4-5 · LH 5-3-2-1
Fb Ab Bb Db · RH 1-2-3-5 · LH 5-3-2-1
Ab Bb Db Fb · RH 1-2-3-5 · LH 5-4-2-1
Bb Db Ab · LH 5-3-1
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| Symbol | Bbm7b5 |
|---|---|
| Also written | Bbø, Bbø7, Bbmin7b5, Bb-7b5 |
| Notes | Bb Db Fb Ab |
| Formula | 1 b3 b5 b7 |
| Intervals | root, minor third, tritone, minor seventh |
| Type | Half-diminished seventh chord |
Bbm7b5 across the keyboard
Piano, C3 to C5. Notes in this scale, low to high: Db3 (flat 3), Fb3 (flat 5), Ab3 (flat 7), Bb3 (1), Db4 (flat 3), Fb4 (flat 5), Ab4 (flat 7), Bb4 (1).
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Questions
What notes are in the Bbm7b5 chord?
Bbm7b5 (B flat half-diminished seventh) has four notes: B flat, D flat, F flat and A flat. Its formula is 1, b3, b5, b7. Bb is the root, Db is the minor third, Fb is the tritone and Ab is the minor seventh.
How do you play Bbm7b5 on piano?
Play Bb, Db, Fb and Ab together. Root position: Bb Db Fb Ab · RH 1-2-3-5 · LH 5-3-2-1.
What key is Bbm7b5 in?
In major keys, Bbm7b5 is the viiø7 chord in B major. It is diatonic to those keys, so it fits songs in any of them.
What is the difference between Bbm7b5 and Bbdim7?
Bbm7b5 and Bbdim7 share Bb, Db and Fb. Bbm7b5 has Ab, the flat 7th, where Bbdim7 has Abb, the double flat 7th.