C#m9 chord (C sharp minor ninth) on piano
C#m9 (C sharp minor ninth) has five notes: C sharp, E, G sharp, B and D sharp. Its formula is 1, b3, 5, b7, 9. In major keys, C#m9 is the ii9 chord in B major and the vi9 in E major.
C#m9 inversions and fingering
C# E B · LH 5-3-1
C# B E G# D# · RH 1-2-5 · LH 5-1
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| Symbol | C#m9 |
|---|---|
| Also written | C#min9, C#-9 |
| Notes | C# E G# B D# |
| Formula | 1 b3 5 b7 9 |
| Intervals | root, minor third, perfect fifth, minor seventh, major second |
| Type | Minor ninth chord |
C#m9 across the keyboard
Piano, C3 to C5. Notes in this scale, low to high: C#3 (1), D#3 (9), E3 (flat 3), G#3 (5), B3 (flat 7), C#4 (1), D#4 (9), E4 (flat 3), G#4 (5), B4 (flat 7).
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Questions
What notes are in the C#m9 chord?
C#m9 (C sharp minor ninth) has five notes: C sharp, E, G sharp, B and D sharp. Its formula is 1, b3, 5, b7, 9. C# is the root, E is the minor third, G# is the perfect fifth, B is the minor seventh and D# is the major second.
How do you play C#m9 on piano?
Play C#, E, G#, B and D# together. Shell (left hand): C# E B · LH 5-3-1.
What key is C#m9 in?
In major keys, C#m9 is the ii9 chord in B major and the vi9 in E major. It is diatonic to those keys, so it fits songs in any of them.
What is the difference between C#m9 and C#m7?
C#m9 is C#m7 (C#, E, G# and B) with D#, the 9th, added.