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
Dr. Dre and is known to pressure the artists with whom he records to give flawless performances. In 2006, Snoop Dogg told the website Dubcnn.com that Dr. Dre had made new artist Bishop Lamont re-record a single bar of vocals 107 times. Dr. Dre has also stated that Eminem is a fellow perfectionist, and attributes his success on Aftermath to his similar work ethic. He gives a lot of input into the delivery of the vocals and will stop an MC during a take if it is not to his liking. However, he gives MCs that he works with room to write