This is beautiful... and I will find the song. We don't get much fall here... the leaves usually turn brown in August and fall off from drought. Goes from hot to cold and back again. No fall. :)
If I were you, I would look up "Autumn Leaves" performed by John Coltraine. One of the most famous and well-known improvisational recordings ever. You can hear great versions by all the greats: Miles Davis, Cannonball Adderly, etc. Get them all.
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Oh, and BTW, nice pic.