Can i use my mac pro to play music through my macbook via wireless? for example I have an apple tv... a mac pro and a macbook pro. I wish to play all the music from my macpro upstairs through apple Tv ( i have that working) and through a macbook pro hooked to a PA outside .... I am aware that i need to score airport express but dont have funds ATM. will the macbook pro accept a stream from another mac?