The dirtiest way is pluggin your guitar on the amp, plug the amp on your computer, and record your signal with a software as Cubase, SoundForge..
Hades by Kalmah
(and btw, you let the metronome click for like 15 sec. after the riff )
Way to go and fry your soundboard. A computer's mic input expects a signal around millivolts, ffs.