Thanks.
The walls and ceilings were built purely for soundproofing, which if you want to have a dead quiet room and have to deal with close neighbors, is mandatory. No sound in, no sound out. Then comes the acoustic treatment. Separate things entirely. I see where it would be neat to knock down both those things in one swoop, but I fail to see how anything in a wall or ceiling behind a double sheetrock green glue sandwich construction, a big part of soundproofing for neutralizing low frequencies, would have any chance at doing the job of absorbers and corner bass traps.