Thanks for the reply D. I understand what you are saying. It isn't getting the signal from the Variax into the computer and then into the DAW that is bothering me. It is making it sound right once it is in there. Perhaps an example would explain my question more clearly. If I'm recording my electric guitar, I plug the guitar cable into the instrument cable of my interface and in Cubase, I add an amp plugin for say a Fender Twin to the track I'm recording to. I hit record and play my guitar and it sounds like I'm recording my guitar through a Twin.

Now on the Variax, if I were recording the electric guitar sounds, say the Telecaster, I would keep the the Fender Twin plugin on the track, hit record, and I record the sound of a Telecaster through a Twin onto that track.

But what plugin(s) would I use for recording the Martin acoustic model? I don't have a plugin for an acoustic amp, and I can't find one anywhere so I assume they don't exist and/or are not needed. Do you just record the dry signal to the track? Is that all that is needed for it to sound like a mic'd up Martin on the recording?