I've just got my NFB-28 unit and would like to say thanks a lot to kingwa for his responsiveness and excellent customer service. :-)
I have the device hanged on both my MBP and Intel NUC (ubuntu minimal with XBMC) and listened for more then 3 hours on each of them, but did not notice the issue yet. The input is USB with the upgraded TCXO.
u mean the distorted sound issue after 3 hours of continuous use? if yes, the normal working unit shouldn't have that issue (i tested my new unit with 6 hours of continuous use, this 1 working well no distortion at all)
how about the truncated first half-second of your music, did u also experience the same issue? because kingwa told me the non DSD ver of NFB-28 didn't have the PCM/DSD muting design (maybe the earlier ver of NFB-28)