Let's brainstorm..Setting up MinimServer to feed a USB DAC

[Zee]

Most ideal to me would be something like a Raspberry Pi acting as a 'digital only' renderer that is Openhome UPNP/AV compatible. This device can then connect to your USB DAC.

I believe there is some software out there to use the Raspberry Pi as a render, but I'm not sure if that can output USB for you DAC and also I don't know if it is fully Openhome compatible to support gapless playback avoid having the control point to be accessible all the time.
And input on this would be appreciated!