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 without the help of collaborators, and that he is responsible for the success of his numerous albums. Dr. Dre's prominent studio collaborators, including Scott Storch, Elizondo, Mark Batson and Dawaun Parker, have shared co-writing, instrumental, and more recently co-production credits on the songs where he is credited as the producer. Anderson Paak also praised Dr. Dre in a 2016 interview with "Music Times," telling the publication that it was a dream come true to work with Dre. It is acknowledged that most of Dr. Dre's raps are written for him by others, though he retains ultimate control over his lyrics