B9 chord (B dominant ninth) on piano
B9 (B dominant ninth) has five notes: B, D sharp, F sharp, A and C sharp. Its formula is 1, 3, 5, b7, 9. In major keys, B9 is the V9 chord in E major.
B9 inversions and fingering
B D# A · LH 5-3-1
B A D# F# C# · RH 1-2-5 · LH 5-1
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| Symbol | B9 |
|---|---|
| Also written | Bdom9 |
| Notes | B D# F# A C# |
| Formula | 1 3 5 b7 9 |
| Intervals | root, major third, perfect fifth, minor seventh, major second |
| Type | Dominant ninth chord |
B9 across the keyboard
Piano, C3 to C5. Notes in this scale, low to high: C#3 (9), D#3 (3), F#3 (5), A3 (flat 7), B3 (1), C#4 (9), D#4 (3), F#4 (5), A4 (flat 7), B4 (1).
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Questions
What notes are in the B9 chord?
B9 (B dominant ninth) has five notes: B, D sharp, F sharp, A and C sharp. Its formula is 1, 3, 5, b7, 9. B is the root, D# is the major third, F# is the perfect fifth, A is the minor seventh and C# is the major second.
How do you play B9 on piano?
Play B, D#, F#, A and C# together. Shell (left hand): B D# A · LH 5-3-1.
What key is B9 in?
In major keys, B9 is the V9 chord in E major. It is diatonic to those keys, so it fits songs in any of them.
What is the difference between B9 and B7?
B9 is B7 (B, D#, F# and A) with C#, the 9th, added.