Here's a useful & practical way to teach and learn modes for jazz improvisation. I was confused for years by the silly way that people often talk about modes. Is D Dorian D Dorian or is it C Dorian ? (It's D). Counting backwards from the 5th degree to try and figure out what mode is which scale equals what chord...
Forget all that, it just wastes your time. Here's a useful way instead.
This video will lead into other videos about modal improvising AND also about using modes as building blocks for playing through chord changes.

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https://jazzworkshopaustralia.com.au/...