Room treatments on the ceiling?

I use four ASC Cinema Panels, that both absorb and difuse. The effect was helpful in taming an overly bright and bleached sounding room. I have them mounted directly above, and parallel to, the wall behind the speakers. Helpful. We have soffits along the perimeter of the ceiling, so the sound panels are mounted at 45 degree angles -- this helped considerably in the ascetic appearance of the panels.

Ceiling treatment is very effective once you have scattered back wall reflections AND you have carpeted and cleared area in front of speakers. Nuance will become obvious and even prominent. It's essential to get the "real"-subtle" artistic intent. It's the difference between the casual versus "serious'-i.e. "absorbed-sensitive" listener. After I treated my ceiling and floor - I would never go back. Don`t use absorption-keep things lively.

Ptss, what did you do to treat your floor?