C7#9#11/F# chord
C 7 #9 #11 · Inversion · F# in the bass
Open position
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Notes
C
R
E
+4
G
+7
A#
+10
D#
+3
F#
bass
About C7#9#11/F#
C7#9#11/F# is C 7 #9 #11 with F# as the lowest note. This is the inversion of the chord — the same notes as C 7 #9 #11 (C, E, G, A#, D#, F#), but voiced so that F# sits in the bass. Slash chords create a smoother bass line movement and are common in chord progressions where the bass walks stepwise.
Other inversions
Open position
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