How To Configure HiFiBerry Digi+ for 192 kHz

According to HiFiBerry, the Digi+ “Dedicated S/PDIF interface chip supports up to 192 kHz/24bit resolution”. When I play a 192 kHz FLAC file via Pi Musicbox and Mopidy, my DAC sees it as 96 kHz. Is there a way to get the Digi+ to process 192 kHz at full resolution? Thanks.

Can you take a look here and try some of these debug commands. High Resolution music dowsampling sort of?