
1) When there is a call for instrumentals, can there be voices that whistle or "ooooh" with no words (just more of a percussive sound), or is it strictly no voices whatsoever?
2) Also, does "solely acoustic guitar driven" mean use only acoustic guitars (no bass, drums, etc, ) or that we can use other instruments but have the acoustic guitar in the forefront?
I'm still new and will probably be asking lots of questions for awhile - again, many thanks, in advance - I love this forum!

Cherbear