Mastering Nine Inch Nails tablature is an exercise in dynamic restraint and tonal sculpture. Reznor's genius lies not in athletic scale runs up the fretboard, but in knowing precisely when a single palm-muted root note, held through an ocean of analog fuzz, will hit with maximum emotional impact. Modern digital modelers make accessing these once-esoteric studio chains easier than ever. Grab your guitar, drop the sixth string down to D, crank your fuzz stage, and focus on the percussive space between the notes.