Advice on new studio build

[Bryanf87]

I'm not too worried about having a zoning system in place, I don't really think it's something I need and I should be able to control the amount of air flow to the different rooms by routing to more / less registers. What I would probably do if I end up going with a ducted system is route larger and more registers to the live room and control room and run a smaller single duct to the vocal booth, branching off somewhere towards the end of the main trunk and include a silencer box if necessary.