Studio design ideas

So I have a space that can be used for a master room. Attached is the sketch. The room dimensions are, 15.5'Lx15'W with ceiling height average at 8' as the ceiling is pitched from 5' to 11'. The walls and ceiling are 6" and insulated with 5/8" sheet rock on it. All input is welcome and desired.

please review the read-me before posting stickies for rules regarding how to get the best possible assistance including your location. thanks!

Thanks for the response and input thus far. I looked for the rules to stickies but couldn't find it. I have included my location. I did neglect to add that that there is a fiberglass corrugated skylight 5' near center of the room. This room is in a barn. The door is 4" think and was hand made by my step dad many years ago. It has tongue and groove wood on the outside and 1/4" plywood on the inside. It is filled with R19 pink insulation. I am currently using the space to have band rehearsals and record. I want to build an room right next to it with the same dimensions but without a window looking to the outside world. It is the only space I have to use. The closest neighbors are over a 1/4 of a mile away. As for budget I am open to all suggestions. Thanks Karl

I am going to resubmit this with a better sketch including additional available space. Karl 8)

i think having the 15x15 room is tricky but you could also angle some of the walls with slats to offset that. diffusion versus absorption is something you need to consider in defining your space. the large door offers some challenges but may be a nice feature to retain.