This is what I am trying to do. I have a huge iTunes library which resides on my MBP. The music itself is on the external drive connected to my mac mini which is in the closet. I can play the music from my MBP fine, send the music to external speakers etc. That's fine but, while I am listening to the music I would like to open my temporary iTunes library which I use to edit tags for the new songs before I put it in my main library. The problem is that I can't open 2 libraries at the same time. Can I use AppleTV to stream music from one library from my iTunes without that library being open on my MBP? Right now what I am able to do but it takes like 10 min every time I want to make this work. I am able to open the iTunes library over the network on my other MBP but it's just to cumbersome. I have to connect to the computer which has the library then open that library in my Itunes and that takes about 5min because the library is HUGE and then after that another minute to connect to the external speakers. Could AppleTV solve this?