I use Detour to route the sound from iTunes and VLC to a USB audio box while everything else is sent to the built-in speakers. The USB audio box is hooked up to my stereo. Detour has worked beautifully for this. I consider Detour to be one of my most satisfying software purchases ever. It was more than worth the asking price. For the moment, at least, Detour still works great. I too hope Rogue will release Detour as an open source project. I can imagine that there may be some issues with doing this, but hopefully those can be overcome and the source released. Detour deserves to live on.