hi just raed your post and i think i might be able to help i did a betech in music tech and did a lot on studio steups what you need to do is have om of the walls on a angle of 45 degrees and sometimes it also helps to have metearl as well in terms of the window you wont it needs to be triple galzed and the three pains of glass need to be diffrent thinknesses and the two outer pains also need to be on a sloght angle leve tha celin as it is and carpit tha floor try abd get fire doors and wetsute rubber for the control room most commen will be a live end dead end the end neer the spekers live and all behind whare you are siting dead if you wont any other help email me
tom.attwood@hotmail.com