I decided I couldn't wait for the firmware update for the Calyx M which was supposed to be due this month and put some FLAC and DSD on a card.
Good ol' C.C. Colletti on the Calyx M sounds good, but slightly harsh, but the kind of harsh you get from new electronics sometimes. Maybe with use it might change. It might not too. The AK240 was more clear, but not dramatically so. As I've said before this is a top recording and with lesser quality music this difference might not be noticeable.
I might try running the Calyx overnight for a few nights in DAC mode to see if things change.
How's the CalyxM against AK240?