Dr. Dre Nas' "Hustlers", and several beats on Eminem's Relapse album. Soul and R&B pianist Mark Batson, having previously worked with The Dave Matthews Band, Seal and Maroon 5 has been credited as the architect of this sound. Besides Batson, Aftermath producer and understudy of Dre's, Dawaun Parker, who has named Q-Tip and J Dilla as his primary influences, is thought to be responsible for giving Dre's newest beats an East Coast feel. Dr. Dre has said that his primary instrument in the studio is the Akai MPC3000, a drum machine and sampler, and that he often uses as many as four
Dr. Dre reviews from critics. Rumors began to abound that Aftermath was facing financial difficulties. Aftermath Entertainment also faced a trademark infringement lawsuit by the underground thrash metal band Aftermath. "First Round Knock Out", a compilation of various tracks produced and performed by Dr. Dre, was also released in 1996, with material ranging from World Class Wreckin' Cru to N.W.A to Death Row recordings. Dr. Dre chose to take no part in the ongoing East Coast–West Coast hip hop rivalry of the time, instead producing for, and appearing on, several New York artists' releases, such as Nas' "Nas Is Coming", LL Cool