Left Channel
1000+ Head-Fier
It heavily depends on the signal chain in the front of your coax input (which does support up to 24/192 sampling rates) so possibly would have used ProJects MQA decoding abilities if first unfold has already been made through Roon or Tidal/various OS.
Only the USB signal is processed by the MQA decoder in XMOS. Coax and optical signals take another route. The designer of the DAC has posted this information elsewhere (pinkfishmedia.net). If software decoding is done upstream, that 1x "unfolded" signal is passed through coax or optical with no further decoding (or filter limitations), but if the signal comes in via USB then "MQB" decoding would occur.