Changes

The recommended settings for tracking DI's are to use your usual input setting - (front or alternate) for your guitar signal. Use SPDIF output settings of Git/Mono L or Git/Stack. You can record both the dry guitar and wet ("amped") sound to separate tracks, by using mono tracks and setting the dry track's input to SPDIF L and wet track's input to SPDIF R.

If SPDIF is not available, the simplest setup is to use the Direct Output to send the dry DI signal and the Main outputs to send a stereo wet signal. The output settings for the Main outs are the same - Git/Mono L or Git/Stack.