Ok I'm having this problem and I have exhausted all my avenues of knowing what to do.
Asus Netbook with windows XP and running Spotify and JRiver MC17......Spotify works no problem with the rPac connected to the netbook, however when I open up JRiver and try and play an album the sound outputs via the netbook speakers and not the headphones connected to the rPac.
The rPac has a green light.
the netbook is showing Arcam rPac USB 1.0 as the output device in the sound settings
Jriver is showing rPac as the output device......I have tried using ASIO and Direct Sound under the DSP settings and the sound still outputs via the Netbook.
From what I can tell this is an issue with Jriver somewhere rather than the netbook (I am making this assumption on the basis that Spotifiy works with the rPac and Headphones)
Does anybody have any ideas on this?