How is audio recorded with the SI-2k Mini? I'm looking at mounting the unit on backpack harness system, in which the laptop recording the video would be in the backpack. So how would I feed the audio into the camera (or into the laptop)?

If I need all kinds of external USB inputs to get audio and time code ins, then is it possible to plug the SI-2k Mini into the larger SI-2k unit and use the Mini as a remote head and just plug the audio into the main SI-2k unit?