I'd like to preface by saying that I'm not excellent at physics, so I"m still trying to figure this out. I know that when you have an internet connection you have multiple "channels" open to deliver data. The same with audio wires. I was listening to a podcast and they were talking about the new movie "Brave" being shown with a new Atmos technology, which used 62 channels. Even Television channels all are present but you have to 'listen' in on the right frequency... So my question is, what is happening here? What is being sent down the wires? Electrons, and what determines how many channels you can have on a wire? and if you have one bunch of elections at a certain frequency for channel X, and another bunch of electrons vibrating at a another frequency for Channel Y, how do the two channels not interfere with each other? Especially if there are a lot of channels? I tried reading through a few wiki articles, but it was hard to get through..