I'm sorry, but I have neither here. Been many yarin since I messed with the Aebersol stuff, but gotta say it is a great learning tool.

Those are certainly going to be passing chords, though, especially the 4th measure of that tune, there's a small myriad of subs that will work in there, too. Thinking about it, that C7+4 notation may be trying to indicate a C7sus you might try that and see if it sounds like it.

The two +9 chords, I'm hoping to you-know-what it is not trying to say a mere A9 or D9 there, but it might be, all I can say from here is to try things like that on your keyboard as the recording plays and see if you can use your ears to sort it out.

Seven Sharp Nine in jazz is often rather dependent on Voicing, this is one chord where simply adding all notes into Closed Chord stack typically sounds terrible in jazz. For C7#9 try this Voicing: C in the bass and RH plays E-Bb-Eb. Often used in passing chords, great sub to put the E7#9 as the second chord in the opener to Misty, typically the second time around. Nice.


--Mac