RickeG, I'm not Mac, but then again, he didn't use a 13th chord in his post. So, not sure who you are asking.

A 13th chord does not contain "all the notes in the scale".

C13 for example has, going up from C root: C E G Bb D and A

You don't have to play all of them. In fact, a guitarist would often leave out the root if there is a bass playing it. A guitarist can tell you better.


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