One problem I have found with audio playback is that it becomes choppy and very difficult to follow once the Surface lockscreen descends. Immediately upon employing the lockscreen, the audio chops out and then remains inconsistent and choppy until you wake the Surface back up and return it to its “active” state again. It is almost as if the power save function is cutting too much power or inconsistent power from the audio system. Unfortunately, this quality makes it very difficult to use to listen to any sort of podcast for any longer than your active session. I am using PushPod to play my podcasts.