Pick a song and the gear you own, and XTen tells you how far to turn each knob. Upload an audio file or paste a YouTube link, choose your amps, pedals, multi-effects, guitar and pickup, listen to the separated guitar tracks, and get values written in each device's real knob names and scale. Every value carries a trust grade: amp gain band and delay time are reliable, and the rest are starting points to tune by ear. Supports 119 amps, 336 pedals, 49 multi-effects families and 175 guitars.