Is it just me or is the D12 not able to play 24/192 audio via optical in? When I try this via my AK100 and the Sysconcept cable, I can hear the song but a TON of static on top of it. Does the D12 not actually support 192 kHz optical input? iBasso's web site is surprisingly silent on the question. As far as I can tell, all the DAC chips support it, except the USB chip. Yet, it doesn't work.