Do you mean you want acoustic treatment or soundproofing?
Soundproofing cannot be done by foam.
Your walls, windows and doors must be modified, and soundproofing a door costs like $5000 already.
If you mean acoustic treatment, there are 3 kinds of foams - absorbers, diffusers and basstraps.
You need knowledge on where to set up if you want to do it yourself.
There is a shop at peninsula (Excelsior Shopping Centre) that sells and can do it for it though it is quite costly.
I have a supplier and can sell to you. But i need to know how much you want and all.
The sales person at luther music told me if you do not want the music to escape from the room (isolation), must use thick padding which Music Theme at B1 do sell acoustic foam (egg shape) cheaply for $50 at 1.5m by 2 m.
