Great pointers guys.. i have a room that is almost identical, except my doors are in different places and my setup backs up against the closet/booth.
I am going to try this setup, but could u reiterate what treatment will be required i.e solid rockwool covered in material...acoustic foam. how much coverage? and how do u find ur reflection points
i will trap the places u have said...i need the room to be nice for monitoring and recording singers.