I've been transcribing some licks that caught from Kurt's recording of More Than You Know and am trying to come up with some harmonic justification for one note of one lick in particular.
This is a quick ii-V-I lick (in F) starting at 3:50. A-G-C-A, B-A-F-D, A-G-E-C#, F#-E-C#-A#, resolving to A (the third of F)
The last two groups of four notes are easy to analyze, since they are just A7 and F#7 arpeggios, which are related to C7 through the diminished scale and imply C13b9 and C7b9b5, respectively.
My question is about the first half of the lick, and particularly the presence of the B natural on a C7 chord. My best guess is that Kurt is thinking of a G9 chord here (B-A-F-D), following by a Gsus (A-G-C-A). So, G-7 to C7 becomes Gsus to G9 to C7. This seems like a decent justification to me but I was wondering if anybody had any other thoughts on this.
By the way, in case anybody was wondering more about this tune, Kurt's version appears to stick very closely to the chart in New Real Book 2 (including the verse). Additionally, I would recommend that anybody who likes Kurt's arrangement of You've Changed to check out the Ella Fitzgerald version on the Whisper Not cd, as he borrows quite a bit from it.