Pretty sure the HDR FOX T2 will only output digital audio stored on the hard disk in the following compressed audio formats, with only mp3 supported as a audio only file. You would have to create some sort of video track for the others (a static image will do).
Mpeg 1 Layer 2 (MP2) as used by SD broadcasters.
MP3
HE-AAC 2.0 or 5.1
AC3 2.0 or 5.1
I know for a fact DTS, DTS HD master and .WAV file formats are not supported. Files with either have to have the audio replaced with ac3 or aac adio.