Good explanation on C7, C9, C13 Differences

Bill McCloskey · Post by **Bill McCloskey** » 16 Oct 2022 7:09 am

One of the better music theory youtube videos I've seen with a great explanation of how to read chord charts that contain altered and upper extension chords. Main take away: A chart is information, not instructions. I definitely learned some things about playing dom 7ths and incorporating 9ths, flat 9ths, flat and augmented 5ths etc.

https://youtu.be/nSaLz9yTe3o

Ian Rae · Post by **Ian Rae** » 17 Oct 2022 2:13 pm

Thanks for posting, Bill - excellent and clear!
I already knew the theory, but the "informatìon" aspect clarified for me exactly what to put in a chart.

Fred Treece · Post by **Fred Treece** » 18 Oct 2022 7:08 am

I wish someone had told me about this before I auditioned for my high school jazz band 50 years ago. Instead I just sat there like a lump, unable to read the chart which was impossible to play even if I did understand it.

After buying several jazz music books (with more of those impossibly complex chord diagrams above the staff) I figured out on my own pretty much what this guy is talking about. But the point about NOT altering a chord with a specified unaltered extension beyond the 7th is something I’d never thought about. I usually just appreciated having something readable and commonly playable. Also, what a chord guy is “expected” to play beyond the 7th may be genre-related. As always, when in doubt, KISS it.

Ian Rae · Post by **Ian Rae** » 18 Oct 2022 1:33 pm

Fred Treece wrote:what a chord guy is “expected” to play beyond the 7th may be genre-related

goes without saying, so I'm saying it

Fred Treece · Post by **Fred Treece** » 18 Oct 2022 2:24 pm

You know what happens when you assume something, Ian.