[ErVikingo]

We are building our new home with a poured slab, cmu with filled cells and a Hambro poured roof.

Closed cell spray foam on roof and all exterior walls. I can find the calculated R-values for these if you find them useful. A friend did the same (except a truss/wood roof) and the place is super quiet and feels clean.

My Hambro is designed with reinforcements to allow for the installation of solar panels in the future (also running wire chases for that).

Many options regarding sound. A lot of it will depend on where you will install the speakers.

Roof, use closed cell and water should not come through in case of a leak on the exterior portion.

I'm an accountant not a builder but have been researching for years now.