Audio room floor question

If your laying hardwood over concrete, then I would put down cork as a barrier between the concrete and the wood. Can you raise your ceiling; this would open up the sound, giving it room to travel. What about your walls? Are you using electrostatic panels?

Here's an interesting read about acoustics in Boston's Symphony Hall;

http://www.architects.org/architectureboston/articles/seen-and-heard-boston-symphony-hall

If I were going to place in a wood floor, then I would try finding used planks from an earlier estate. Used wood will typically sound more organic and less shrill. And I totally agree with not putting the flooring directly over the concrete, meaning without some sort of a barrier.

Cork sheet that's 1/4 to 1/2 inch in thickness will be comfortable to walk on and it will provide an acoustic barrier. Any hard surface flooring like tile or concrete will cause sound waves to ricochet. This will also be a problem if the wood flooring is placed directly on top of concrete. As a hypothesis, I'm referring to decoupling the cement floor from the wood flooring above it, while allowing the acoustic presence of the wood to resonate. You definitely don't want to soundproof your floor or anything else, as this will totally kill your sound. However placing rugs on top of wood can stabilize acoustics without killing sonic presence.
IMHO