Wonderful stuff. Saw a brilliant performance of similar material once up close in Istanbul.
It's the only way to grasp some of Blackmore's finest, not to mention Strunz and Farah!
Any guitarist could benefit well from listening to this music.
I know you can all use Google as well as I can, but I thought this was an interesting site about the variety of ways that ouds are tuned. Looks like they could be adapted to guitar, with maybe a little restringing needed.