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Why is this note in C7+9?

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up vote 5 down vote favorite 2 I’m reading the jazz piano book and I can’t see how the upper c flat note has a place in the C7+9 chord. The ninth note on the C major scale is a d so +9 would be d# not c flat = b Or am I wrong? theory chord-theory jazz share | improve this question asked Nov 14 at 7:53 John Cataldo 230 11 1 Would it be from a Mark Levine book? There are often anomalies s...