I'm about to put in some flooring in my basement HT. My options are 1) concrete, padding, carpet, 2) concrete, padding, floating floor, throw rug 3) options 1 or 2 with additional sub-floor underneath. Limiting factors include cost, ease of installation and additional room treatments that any of the above would engender. I understand a subfloor is probably desirable in any event, but I have to consider cost as well as performance. My first priority is to isolate the room from the rest of the house, as I don't want to disturb everyone else with my viewing/listening habits. At the same time, I wish to deaden some reflections in the room, as I won't have the budget to give the room a "full" acoustic treatment. The room already exists, with drywall walls all around. I intend to add a double row of staggered studs, filled with fiberglass insulation, and a layer of drywall for the inside wall. I will definitely do this for the interior walls (two of them) but am as yet unsure about the two walls that are framed over the concrete walls of the foundation. The current floor is simply painted concrete. My wife would like the family room (next door) to have a floating floor (hates carpets) but when I mentioned that such a floor would need a rug of some kind in the HT room, she questioned the wisdom of putting in such a floor, only to see it covered up by a rug, if a carpet would be better. In the end, I really don't care what kind of floor it is, so long as it serves my acoustic purposes of deadening reflections and isolating the room. I don't want to be anal about it, as I have to avoid spending gobs of money and I have walls/wiring/paint/chairs/racks/stands and other misc. things to consider as well. In the end, my wife's comments went to what is best for that room, even if it costs a bit more than the floating floor with an area rug. I know a bit about treating an existing room but I'm less certain about what to do with a concrete floor. If, in the end, a floating floor with an area rug is better than a carpet, then that's what we'll do. I'd just like to know before I get started. P.S. My main concern about a carpet in the basement is the humidity factor. I wouldn't want to trap additional humidity for nothing, and have to resort to a noisy de-humidifier, which would render my acoustic space moot. Sorry if this seems like silly questions, but I'm a history teacher, not a carpenter.