he does this starting at 7:30 on pretty much, again he doesn't do the calibration thing, but he burns a preset onto the pedal then edits it (Input Gain and Master Volume) and saves it. As @Gibs210 said, you can figure out the best Input Gain for a particular bass and just write the numeric value down for that parameter then you can do that with every preset you want to use with that bass rather than recalibrating every time.This video is OK, but what would really help is one that goes through how to modify and save presets to your library through the app. I know I’m always going to be swapping in and out presets and it would be nice to have them ready to go instead of adjusting the I/O levels every time I burn a preset or move one around.
If you want to edit a preset then save it to your Library instead of onto the pedal, you just find the preset> click on the right of it> hit edit> edit the preset to taste> hit "save". You should get a menu where you can choose the instrument type and give it a name and save to library> Hit Save. Now you have an edited preset in your library to load on the pedal whenever