Hello All, I an new to the forum, have played guitar for over 30 years live and studio. I was an early adopter of Roland V Guitar modelers and played them live and in the studio for years. Have used many tube amps and effects professionally so I have a lot of experience with both "real" amps/effects and modelling. I recently just purchased Logic 9 and started to play with Amp Designer and mainstage. I am getting pretty good results and although I haven't compared it to 3rd party guitar software like Guitar Rig or Amplitube, the sounds seem very useable, the interface is excellent. My question is this. I am connecting my guitar through a Radial instrument buffer/splitter and then to my MOTU 896 audio interface. It all works fine, but I am very dissatisifed with the dynamic response. It feels exactly like plugging into a DI box or solid state preamp. Basically, it does not track the dynamics at all like a real tube amp. Ones symptom is that changing pickups selector does not respond like with an amp. I use a mix of single and humbuckers and use my pickups to kick the amp into different gain and volume levels. I am curious what others are using in front of the A/D stage, it seems that the software is doing it's job just fine, but that there needs to a tube type of interaction/compression to have it all match up like you would expect.