I have a new studio in a finished basement which is 12x13 with 7ft ceilings. I intend to record acoustic and electric guitar and vocals. The ceiling and walls are sheetrock and the floor is tile. Should I put acoustic tile on the ceiling, and if so, should I go with Home Depot .55 sound reduction rating or shoud I special order Armstrong .90? Should I put carpet on the floor? I understand that this will not alter isolation because there is no change in mass.