By default Windows configures SQ as a mono speaker system, which will then cause nearly everything (VLC, Foobar, Spotify etc.) to abort playback. To fix this go to the Sound->Playback menu, find the SQ and click Configure. From there you should be able to set it as a stereo output. Just make sure you have the latest drivers/latest SQ firmware as until 1.3.1 there was an issue with glitches on USB audio streaming on Windows.