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C9 vs C7add9 clarification

Posted: Thu Apr 09, 2026 8:15 am
by Leeacoustic81
Just wondering if a C9 is the same as a C7add9?

C9 vs C7add9 clarification

Posted: Thu Apr 09, 2026 1:23 pm
by BluesGuy
39 years as a professional musician. I’ve never seen “X”7add9 as a chord symbol. EVER. Don’t use it.

C9 vs C7add9 clarification

Posted: Fri Apr 10, 2026 7:25 am
by StudioPro
Yes, but C7add9 is NOT standard, it defeats the whole point of "add", dont use it... since C9 is for C E G Bb D, when you want C E G D only, that's why we have the "add" thing, to separate it from the 7-ness.

C9 vs C7add9 clarification

Posted: Mon Apr 13, 2026 8:16 am
by MetalPlayer
Yes, but don't call it C7add9 because it's too easy to mistake for Cadd9. Just C9 is always understood to mean root, third, fifth, seventh, ninth. You can leave out the fifth, but if you leave out the seventh it's called Cadd9.

C9 vs C7add9 clarification

Posted: Wed Apr 15, 2026 9:00 am
by GearNerd
The “add” specifically means that it does NOT have the Dom 7th. Cadd9 is C E G D. C9 adds the Bb to that.