Have to get out of the theory stage and into the practical stage. Here's a quick test of one of the daiko drum elements and shakuhachi in the Garritan World library. Played a bit with the pressure channel to get some vibrato. And some ES2 pads.
Doing this quick shows how difficult it is to get some sort of accompaniment going, even if the pads are just straight chords. My feeble attempts to seek out the chords to fit the melody utterly failed. In the end, I went with single notes that seemed to work, and formed chords from those. Bleh.