Does anyone know if you tie a mic to the mic in on the NVR, if that audio will play during synced playback of multiple cameras? I have 3 cameras inside watching my nanny, and like to watch the synced playback as she goes from room to room, but audio obviously does not playback since there are multiple cameras that would be playing at the same time. So I was wondering if I attached a mic to the NVR directly and placed the mic in a central area to overhear everything that would be happening on the 3 cameras, if that audio would playback during synced playback?