I also think that the 562V only handles 16-bit audio there is no mention of 24-bit in anything I've read on it.

This isn't a problem for me, since my main source is effectively a straightforward CD transport, which just provides the 16-bits you get on a CD with no processing.

I guess it's possible that some of my other sources (Freeview, DVD & DAB) are putting out 24 bit detail, but I doubt it, and I'm not so worried about these anyway.