Realtime rendering?? :S

[Timo]

It's not to do with your soundcard, as Flip said you would need to physically record the Virus in realtime and import it as a track into your sequencer, or lay it down (bounce it) with all your other tracks (realtime rendering within your sequencer).

Once done, I'd be more inclined to export the song in Wav format and use a completely separate program (such as RazorLAME with the LAME codec) to fully customise and optimise for the MP3 format. You can always keep the non-lossy Wav as a master backup (for archiving) afterwards, otherwise you would have to render it all again at a later time if you wanted another copy of it. At least with a Wav master you're not burning your bridges like with MP3.