Just a quick update this week. The interior walls have been taped and textured. We just need to paint and install flooring now.
To that end, I've finally decided on the paint and carpet color for the studio. I would have preferred to install some sort of hardwood flooring, but there are a couple of advantages to carpet. With carpet you can get away with less acoustic treatment as the floor is no longer a source of reflections.
I still need to pick the color(s) for the A/V RoomService metu acoustic panels and corner traps, but I want to see how the room looks with paint and carpet first.