I've bought mark levin's jazz theory book and I'm studying alot from it but there's something that really bothers me about the whole process.
Everytime people say I should use a specific mode on a specific chord, i cant really understand how would you know at the second you improvise to calculate which note is it and more importantly finding it on the fretboard.
I studied scales mainly with shapes, I do know to find notes on the neck pretty quick, but I dont know the neck by heart, is this something I must do before I'm trying to use modes over changes? Could someone here elaborate his learnning process and the basic theoretical knowledge he'd say is needed for improvising?
I really want to get to Quayle/Guvan type of phrasing.
The chord tones are your friend. When your're playing over changes it's almost better to think of the arpeggios from within the different scales before the scales themselves, as those are the notes you'll need to focus on if you're really going to nail the harmony.
Based on your first post, I'd say you should spend some time really getting to know the neck until your scales and arps (including the names of the actual notes, not just the physical shapes) are totally intuitive everywhere on the board. I know it sounds like a big job, but if you just do a little bit each day it'll do you a world of good in the long run.