Having had a really insightful thread on Autumn Leaves - that was hugely helpful. It brought together lots of abstracts for me.
I then started to think about keys - so I considered Heavens door 'G C D' thats 'I Vi V' and following that made sense of some of slashes passages in the solos as he follows the chords.
So! I then started to think about something else I've been playing with on my new Hemicaster. A Cadd9 G D Dsus4 D. A nice little chord progression. Deffo starts on A, deffo returns to A. Must be in A then
But it can't be because the chords in this key are A major, B minor, C# minor, D major, E major, F# minor, and G# diminished.
I looked that up :-)
So Amaj is in key, C isn't, G isn't but D is. But its in A?
How does one approach this?