[threesymbol]

I have been thinking about building my studio using cinder blocks to surround the sound and control room. On the inside glueing gypsum board and the avoutic treating the rooms. What draw backs can I expect from the hollow concrete constuction? And If I left as section of the wall exposed behind the drum riser with the rough side of the cinder blocks showing, what benifit would that have on the sound? I have seen studios with brinks behind the drum riser and I am wondering if that is desirable for the drums?