I have active monitors (so no receiver) and just play my audio straight from my Airport Express to my speakers. But I've been thinking of adding more speakers and getting an Apple TV. Would the Apple TV be able to play stereo recordings on all 5 speakers? Does it have Dolby Pro Logic built in so I could do that (conversion of stereo recordings to multichannel)? Usually people have receivers that can perform this role, but as I say, I prefer to stick with my zero electrical components except one Apple device setup. Thanks ahead for your advice.