A lot of players have hi-rez audio playback capability built in, which your 950 can handle.
I experiemented with > 44.1K into my 950, but my 950 could handle it in stereo only, as I remember. It didn't allow for processing of > 44.1K in DTS NEO or DPL 2.
The source was a Panasonic RP-91 DVD player.