Havelock Wool acoustic panels vs fiberglass/Rockwool

@mckinneymike 

Might be a good sound barrier but wool is quite flammable and fumes from it burning are highly toxic. Not sure what an insurance company might think of it. There are some safety reasons why we use rock wool, sheet rock and other such things in construction. Just my 2c worth. Give you something to worry about.

There is some white insulation that I've seen and had that is not glass wool nor rock wool, no itch to it when using. Can't remember who made it but seems like Dow Corning? Bought at Menards or Home Depot, many years ago. I always thought double drywall and good insulation (any kind?) was the "go to" for a listening room. I know lots of things change over the years and more is learned and developed all the time. 

@mckinneymike 

I understand. I'm sure you'll end up very happy with it. Just have to get used to the sheep smell. :) Might want some diffusers or some kind of sound treatments up in the A frame area. I'm no expert, that's for sure. Lots of good advice here. I hope it meets all your expectations. I don't think I'll ever get my sound room, just have to adapt my home office space. It's a work in progress, may never end but it's good enough to enjoy music in nearly every day. I also plan to get the dedicated circuits in place before I'm done. Did it in our other house before moving here. No more moves for me. Too old to do it again, Enjoy.

@mckinneymike 

Very good for you. Also, it is a lucky man to love his work. I "mostly" enjoyed mine but it was not a job for old guys. Forced retirement by 65 if you didn't get the idea before that. :) 18 years back for me but I was only 55 then. Sometimes seems an eternity, sometimes feels like it was last year. Old age, it's a hoot. All the best to you and your project.