Slipknot guitarist Jim Root told MusicRadar.com
that he played bass on "six, maybe seven tracks" on .5: The Gray Chapter
, following the passing of Paul Gray. "I can't even remember which [songs I played bass on]; I'd have to sit down with the guy who played bass on the other tracks to find out."
He continued: "Some of the lines were taken from the demo versions that I recorded in my garage, because they were moody, and had a unique vibe that was too hard to recreate. 'Goodbye' uses the full bassline that Corey recorded for his demo."