Virus not my sound card, route audio via USB

[timtico]

I'm also curious how to set this up.

I want to use the sidechain on a bassline played by the virus while all other patches in the virus should stay unaffected.

Now, I think i want to route the bassline to USB 3/4, and all virus patches towards the standard USB 1/2. However, I can't figure out how to set this up. (and the Ableton tutorial song is quite cryptic)

Ofcourse, I could bounce the bassline to audio and use sidechain compression on the audiochannel, but that's not what i want.

[Talos]

There's a Tutorial in your start menu, and various threads on this forums relating to how to set Ableton Live up for multiple outs.
Search is your friend.

http://www.infekted.org/virus/showthread.php?t=30368

For the Sidechain input refer to Vocoder or FX input in the manual on how to set up the inputs on the Virus.
It has nothing to do with your preferences/soundcard inputs, remember this is a hardware synthesizer.