Yinngtonggao: You seem to be having a lot of issues with your AMR/PC combination. I have not experienced any of the issues you have mentioned sans break-in issues. Perhaps you should try a Mac Mini with Pure Music. The USB sounded good right off the bat in the AMR. My Mac Mini going into the AMR was better than my Mac and Diverter HR with the HR feeding the VDi-HD spdif input. I noted that the USB was about burned in at about 72 hour mark. It is possible I guess that your PC has a lot of power supply noise on the USB output. I honestly did not expect the USB input to be as good as the HR.
On another note, I just purchased 2 Accurian (Halcyonics) Silencers (not delivered yet). I will post my impressions using it with the AMR :) Very excited!!!
On another note, I just purchased 2 Accurian (Halcyonics) Silencers (not delivered yet). I will post my impressions using it with the AMR :) Very excited!!!