>>2991054
My whole house is built out of this. It's great, easy to drill holes and insulation is not needed, the walls end up quite thick tho. If you're just after sound proofing I think other materials are better for this, some foam probably.

>>2991054
You probably want panels of some kind.
I think the aeration just makes it lighter for manageability with a higher R value—regular concrete is probably more soundproof and comes in panels (like, for bathroom tile backer)

Just do the dense - visco-elastic - dense stack like everyone else, it's the standard for a reason. Dense can be concrete or brick or drywall or plywood. Visco-elastic can be green glue, mass loaded vinyl or rebond foam.

https://www.soundproofyourstudio.com/blog/how-to-soundproof-over-existing-walls-ceilings-and-floors