I downloaded the sample file. Indeed it plays with VLC and at least one other player. MC does not know what to do with it.
But I find this file confusing. It is a surround sound audio format that is normally found in a video file. AC3 is "movie audio". But this is a stand alone stream that is not in a container. It is "raw". Where would this even have come from? It seems like this should be inside an MKV container or an MP4 container or something.
Perhaps there is something I'm missing. As I said, this is an odd format for me and maybe I just don't know about some common source or use of this kind of raw AC3 file.
Brian.