Floor question

Hello everybody (hello dr. Nick!) I'll be starting the first part of my construction within a few weeks, and have planned most of what I can plan at the moment. I do have one problem that I can't quite get my head around, though. I've come to understand, reading this site, that with my situation (and very limited know-how) a floated floor would be a huge mistake. I'm building my studio in a garage, and the floor is concrete. It's also slanting a bit towards the middle, and looks pretty bad. I could lay it with some garage tiles, I suppose, and it might look alright (the slant is minimal, but there). But I'd really love a nice parquet floor. Is there any way to even the floor out a bit without damaging the acoustics or pouring concrete (I want to be able to sell this as a garage in the future, if I have to). Thanks a lot.

does the slant serve a purpose? is it slanted to a drain or anything? if the slant is because of a bad concrete job in the first place, you can pour some self leveling mortor. not enough to go flowing out of the garage, but enough to level out the dip in the middle. a pic would help get some replies.

It slants towards a drain in the middle. And since I don't want to destroy that in case I sell the place at some point down the line and the new owner actually wants to use it as a garage I'm taking every measure to ensure that that would indeed be possible. I would post a picture if I could, but I don't actually move into the apartment until this weekend. And besides, the slant is so slight that I don't believe you'd even be able to see it in a photo. I did go there a few days ago to check out the slant, with a builder friend of mine, and it's not too bad. But I do think it's too slanting to actually lay some wood directly on top of it. So it's definately not a bad concrete job. In fact it looks very good, although it's worn, since this is a pretty old structure and has probably never even been repainted. But no, the floor looks sound and the whole structure reeks of quality, although it's not benefited from a lot of maintenance.

I just had an idea for solving my slant, at least in the CR (I don't really mind it as much in the other spaces of my studio, and would be quite happy with some tiles and a slight slant). I'd really like some input. Would it be possible to lay town a wooden frame and manipulate it to get it as level as possible, and then pour sand into it? That should get rid of the acoustical problems, right? I got the idea from Doublehelix's excellent floor. http://www.johnlsayers.com/phpBB2/viewtopic.php?t=8698 How is it working for you? Anybody familiar with using a floor grid to level out the floor like this? My builder friend assures me he can do it, but he's not familiar with acoustics. Thanks a lot.