2001 (Dr. Dre album) were later cut from the final track list. The tracks have been leaked later on several mixtapes, including "Pretox". The album's production expanded on that of "The Chronic", with new, sparse beats and reduced use of samples which were prominent on his debut album. Co-producer Scott Storch talked of how Dr. Dre used his collaborators during recording sessions: "At the time, I saw Dr. Dre desperately needed something. He needed a fuel injection, and Dre utilized me as the nitrous oxide. He threw me into the mix, and I sort of tapped on a new flavor with my whole piano
2001 (Dr. Dre album) sound" from Dr. Dre and that it was as "addictive as it was back when over 3 million record buyers got hooked on "The Chronic" and Snoop Dogg's Dre-produced "Doggystyle"" and went on to commend Dr. Dre, stating, "If any rap producer deserves the title "composer", it's he." "NME" mentioned that Dr. Dre didn't expand the genre, but it was "powerful enough in parts, but not clever enough to give Will Smith the fear". PopMatters writer Chris Massey declared that "Musically, "2001" is about as close to brilliant as any one gangsta rap album might possibly get." Christopher John Farley