I have been untangling Goodbye Porkpie Hat, the original on Mingus Ah Um. The solo section has different chords to the head on this version. I have listened to the sax solo, and I am making notes, but I am interested in the function of the chords in this section. I know the head is a mass of substitutions and extensions, but the chords for the solos become super blusey. I can play something fairly reasonable over them, but I think if I had a better understanding of the substitutions going on, I could do something better. I know there are a ton of interesting things you can do, but I want to do something simple and clear for now.
I have the chords as follows with my notes:
Seem to be i and iv in Eb Harmonic Minor which works nicely along with minor pentatonic.
A is the tritone of Eb and adds alterations to Eb, making it an E♭ lydian Dominant. However, E♭ altered sounds better, or just sticking to Eb minor pentatonic or with a 6th. So some dorian and melodic minor ideas work.
I am playing A♭ Dorian, which sounds nice or just pentatonic.
This is [subV7/V7 V7] of Ebm. Again, playing something simple sounds really nice. Let the chords do the work!
Ebm7 - Ab7
This is I and IV in Eb Dorian.
C-7b5 F7#9 Gb-7 C♭-7 Bb7
C-7b5 can be seen as the previous bar's Ab7 but as a substitute 9th chord (A♭9). It can also been seen as the V of F7 and the Gb-7 as a tritone of the C.
We then go to B-7 with the Gb- as the iii in B minor and the Bb7 as a sub for A7, the VII in minor?
We end on Ebm7 Ab7 Ebm7 Ab7.
OK that is a mess! My head hurts....I am trying to work backwards from the end goal chords but think I got lost :)
Can anyone help and tell me if I am going in the right direction here with my analysis?