Well, I ain't got no music education at all but I learnt D modal from Sparky Rucker, who also ain't got none...

With that said, at least fir the D Modal, it seems to have a nice melancholy mountainy ring to it. Ohter modals I've heard also have this particular sound to them.

Now, I wouldn't swear to it but think Blind Lemon Jefferson used the D modal in his "Keep My Grave Kept Clean"... Well, that's the way I hears it and thats the way I plays it...

Prolly no help whats so ever...

Bobert