My wife and I are moving into a new house. In the basement there's a spare room, that I want to turn into my new home studio. Room size is approx. 236 sq ft/22 qm and 7.5 ft/2.27 m high. The acoustics in this room are quite terrible. It's stone walls and tiled floor and there is a metal pipe running along one wall about two inches below the ceiling. I get a "nice" reverb when I clap my hands. Also I will need some sound proofing to the neighbors basement (it's a semi-detached house) because I would like to play drums. The existing isolation is already quite good, because I have never heard anything from the neighbors house (I know the house for almost five years because it was my mother-in-law's). But just to be sure I'd like to enhance it a bit and minimize the noise to the neighbors house. So I made a plan: I will build absorbers with a 3"/7 cm Rockwool panel (3.3 ft x 2 ft/1.00 m x 0,625 m) in a wooden frame, covered with cloth. On the wall to the neighbor's basement I will put 4 IKEA Billy bookcases (height 6.6 ft/2.02 m), stuffed with 12.5"/28 cm Rockwool and covered in cloth. In the corners of the same wall I will place 2 stacked Rockwool packages (3.3 ft x 2 ft x 2.1 ft / 1 m x 0,625 m x 0,65 m each) on each side as bass traps. In the gap above the stacked Rockwool and Billy bookcases I will put more Rockwool. They will also hold one side of the angled ceiling clouds (absorbers) over the desk. The walls at the drum set will be covered with absorbers and there will be a cloud above it. It should look something like this: So what do you think? Is this a good plan or do you think it's not gonna work?