Dr. Dre there. Eminem then heard the track, and he wrote the rap to it." This account is essentially confirmed by Eminem in his book "Angry Blonde", stating that the tune for the song was composed by a studio bassist and keyboardist while Dr. Dre was out of the studio but Young later programmed the song's beat after returning. A group of disgruntled former associates of Dr. Dre complained that they had not received their full due for work on the label in the September 2003 issue of "The Source". A producer named Neff-U claimed to have produced the songs "Say What
Dr. Dre can control it better." Other equipment he uses includes the E-mu SP-1200 drum machine and other keyboards from such manufacturers as Korg, Rhodes, Wurlitzer, Moog, and Roland. Dr. Dre also stresses the importance of equalizing drums properly, telling Scratch magazine in 2004 that he "used the same drum sounds on a couple of different songs on one album before but you'd never be able to tell the difference because of the EQ." Dr. Dre also uses the digital audio workstation Pro Tools and uses the software to combine hardware drum machines and vintage analog keyboards and synthesizers. After founding Aftermath