Property tax is an outrage. No one should have to pay tax on their home. Anyway, leave it open. The additional height will allow the music to breathe and the joists will act as diffusers.
New construction ceiling advise
I have a new home with a designated listening room in the basement. I have 2x4 studs on 8” center with double 1/2” drywall. The floor will be covered in carpet. The room is 30’ 4” x 16’. I originally planned to use high grade USG ceiling tile but that would only provide a 9’ or less ceiling. My question is this: What if I use nothing overhead? I would be at 11’ to the subfloor above. Sound isolation in this room is not an issue. TIA