Dr. Dre been influential far beyond the West Coast. The beat for the Houston-based group Geto Boys 1996 song "Still" follows the same drum pattern as "Natural Born Killaz" and Eazy E's "Wut Would U Do" (a diss to Dre) is similar to the original "Murder was the Case" instrumental. This style of production is usually accompanied by horror and occult-themed lyrics and imagery, being crucial to the creation of horrorcore. By 1996, Dre was again looking to innovate his sound. He recruited keyboardist Camara Kambon to play the keys on "Been There, Done That", and through Bud'da and Sam Sneed he
Dr. Dre absence of radio airplay or major concert tours. The Federal Bureau of Investigation sent Ruthless Records a warning letter in response to the song's content. After Ice Cube left N.W.A in 1989 over financial disputes, Dr. Dre produced and performed for much of the group's second album "Efil4zaggin". He also produced tracks for a number of other acts on Ruthless Records, including Eazy-E's 1988 solo debut "Eazy-Duz-It", Above the Law's 1990 debut "Livin' Like Hustlers", Michel'le's 1989 self-titled debut, The D.O.C.'s 1989 debut "No One Can Do It Better", J.J. Fad's 1988 debut "Supersonic" and funk rock musician Jimmy Z's