C9 chord
C dominant ninth
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The C9 chord has the intervals I, II, III, vii with notes C, D, E, A#
Matching Scales: C Mixolydian C Hindu C Arabic D Minor D Hindu D Arabic E Enigmatic E Locrian E Arabic A# Lydian
The dominant ninth chord is mostly used in funk, blues and some rock music. It is usually played without the 5th on the ukulele.