I had to do this too to make it stop asking for username/password. i think this is the same for all media player that uses smb such as popcorn hour.
Anyone of you having intermittent problem with your 105d not being detected by a Mac computer via USB Audio? I'm using Macbook Pro Retina, and sometimes it would not detect the unit plugged in to USB Audio. The only solution I figured out is turn off the unit for A WHILE, turn it back on then it will detect it, or unplugged the usb before turning it back on - but sometimes this doesn't work and its effin' irritating!
I can confirm problem of connection between Windows notebook and Oppo 105D by USB DAC. I tried 4 USB A-B cables and the only one that works reliably is the shortest (1 meter). The manual say no longer than 4 meters but I tried 2 meters and it works sometimes (random).
for using Oppo 105D USB DAC with foobar2000 I can suggest you these 3 guides very useful:
Referring to the third guide, point 15, you have to select: "DoP Marker 0x05/0xFA".
Pressing INFO on the Oppo remote you will see on the TV:
1) for PCM: "USB AUDIO IN: Audio LPCM 2.0" followed by the sample frequency of the file playing;
2) for DSD: "USB AUDIO IN: Audio DSD 2.0"
For DSD demo tracks: