Nice
Sounds like you are going to do what I'd like to do in my room. I've looked into acoustic insulation to reinsulate with and then the acoustic mat. My space isn't part of my house and I live in the country so it's not big priority right now. But I do want to hold the sound from getting to the house. My family says the cant hardly hear us anyhow.
Heres a link to what I've looked at
Here's one that I was looking at.


. But I’m going to look locally to see if any places stocks it. I gotta believe somewhere in So CA carries something like this. But I’ll have to wait a month as the governo told us all to stay home for a month. Good thing I have 100 2x4s on hand to start building other areas










