The DT50 MIDI implementation guide shows values for each of the knobs so theoretically couldn't one load a controller to send CCs for preamp, cab, drive, bass, mid, treb, pres, and channel vol? I would think with some trial and error one should be able to switch between amp types and keep the levels fairly unison. I have the HD500 but I'm looking to move to just controlling the internal digital controls of the DT50 with MIDI via another device and using an analog pedal rig. Ideally this would be with one of the pedal loop switchers that can also send MIDI program changes. If I can figure out how to make this work it feels like I would be able to use my analog pedal rig with essentially many many different amp sounds in the DT50 - almost like being able to plug in to whatever amp I need for the situation. If anyone can explain how best to set up that would be amazing. Thanks