Using MR816 with a home theater system?

Forgive me if this is not strictly a question about the MR816. It is about interfacing the MR816 though, so…

When it comes to outputting surround audio, the MR816 (and the UR824) gives you two options: Analog and ADAT. Most home theater surround amplifiers, however, only provide an HTML input option.

I’ve been searchin’ for an adapter that can “translate” from ADAT to HTML, but so far been unsuccessful. Does anyone know of such an adapter, out there?