Sounds like you are trying to apply the soundcard as the Default choice in RB by going to Prefs->Audio.

If so, I recommend putting that back to wherever it was when you could hear the RealTracks first.

Then, in Tracks View, RightClick on the Track where you want to record the Nord, just underneath the trackname, and the popup menu there will show you the options to select that soundcard set of channels to record the Nord on that track.


--Mac