Frequently and rightly placed in the same context as DJ Premier, Pete Rock, and Kanye West, Jay Dee built and sustained a high standing as a producer's producer while maintaining a low profile. When Pharrell Williams appeared on BET's 106 & Park in 2004, he excitedly declared that Jay Dee was his favorite producer and told an audibly stumped crowd that it had probably never heard of the man. At the time, Jay Dee had been active for well over a decade and had netted enough beats -- including the Pharcyde's "Runnin'," De La Soul's "Stakes Is High," Common's "The Light," and several others with production teams the Ummah and the Soulquarians -- to be considered an all-time great. Alternately known as J Dilla, or just Dilla, he never produced a mainstream smash and, in many cases, his presence has to be confirmed with a liner notes scan. (And even then, that might not help; he occasionally went uncredited.) He never marked his territory like Just Blaze ("Just Blaze!") or Jazze Pha ("This is a Jazze Phizzle produc-shizzle!"), and he never hogged the mike like P. Diddy. He let his music, and its followers, do the talking. Rather than provide immediate (or fleeting) thrills, he was hooked on working the subconscious as much as the neck muscles. He was so focused on his work that it took a severe toll on his health.

Born and raised on the east side of Detroit, Dilla -- James Yancey -- was forced by his parents to become involved with music, and he was a record fanatic at a young age, absorbing funk and rap singles and jazz albums, from Slave to Jack McDuff. He learned to play cello, keyboards, trumpet, and violin, but drums got him like nothing else. He tried his hand at producing tracks on a tape deck by using the pause and record buttons, and he also took up MCing. In 1988, he formed Slum Village with Pershing High School friends Baatin and T3. It wasn't until 1992, after receiving some valuable guidance from fellow Detroiter Amp Fiddler, that his talent really began to take shape.

A session keyboardist who had worked with Prince, Parliament, and Enchantment, Fiddler taught Dilla how to use the MPC drum machine. To say that Dilla was a quick study would be an understatement. Fiddler introduced his protégé to A Tribe Called Quest's Q-Tip, who heard some of Slum Village's material, liked it, and helped get the word out. Following sessions with First Down (a collaboration with Phat Kat, another Detroiter), Little Indian, and alternative rocker Poe, Dilla's production career reached full flight. In 1996 alone, he worked with Busta Rhymes, De La Soul, and the Pharcyde, all the while playing a major role in the Ummah with Q-Tip and Ali Shaheed Muhammad. (He did extensive work on Tribe's last two albums.) Before long, hardcore hip-hop fans began to know Dilla for his steady wobble, which was unfailingly musical and rich in details -- shuffling high-hats, oddly placed handclaps, spacious drum loops with drastically reshaped samples of tracks both obscure and obvious.

Through the remainder of the '90s, Dilla quietly racked up more output, including Janet Jackson's "Got 'Til It's Gone" (for which he did not receive credit), additional tracks for the Pharcyde, and collaborative work with Q-Tip on all of 1999's Amplified. Largely upbeat and filled with boisterous energy and thick sounds, Amplified is one of many pieces of evidence against the argument that Dilla was about one sound and one style. During the producer's steady rise, Slum Village remained a priority; Fantastic, Vol. 2 and Best Kept Secret (credited to J-88, an SV pseudonym) were released within weeks of each other in 2000. However, the producer would only contribute a few tracks to the group from then on, as his schedule became increasingly tight. As a core member of the Soulquarians, with James Poyser and the Roots' Ahmir "?eustlove" Thompson, Dilla worked on Common's Like Water for Chocolate, D'Angelo's Voodoo, Erykah Badu's Mama's Gun, and Talib Kweli's Quality. Through 2005, he continued to work with past associates while dipping his toes further in R&B. A favor was returned on Fiddler's 2004-released Waltz of a Ghetto Fly, and a couple dynamite tracks -- Steve Spacek's "Dollar" and longtime collaborator Dwele's "Keep On" -- were released the following year.

Amazingly, from 2001 on, Dilla was also a prolific solo artist. A couple singles and the Welcome 2 Detroit album came out in 2001, and a number of low-key instrumental compilations and incidental 12" singles followed shortly thereafter. Rarely praised for his mike skills, he was often assisted by the likes of Phat Kat, Lacks, and Frank-n-Dank. Wooed by a Madlib mixtape that featured the rhymes of Oxnard's finest over his own beats, Dilla forged an alliance with his admirer for 2003's Champion Sound, released under the name Jaylib. It was around this time that his health took a sharp decline. For over two years, he had to use a dialysis machine. Despite having to perform in a wheelchair, he was still able to tour in Europe during late 2005. Donuts, an album of instrumentals that had been completed during one of his extended hospital stays, was released on February 7, his 32nd birthday. Three days later, while staying at his Los Angeles home with his mother, he passed away, a victim of cardiac arrest. While reflecting on the tremendous loss, close colleague and friend Thompson (an authority if there ever was one) compared the producer's level of genius to that of jazz giant Charlie Parker. Karriem Riggins, a close associate, put the final touches on another album -- The Shining -- which was released six months later. Other posthumous releases and compilations included the Jay Love Japan EP (OX: Operation Unknown, 2007), Jay Deelicious: The Delicious Vinyl Years (Delicious Vinyl, 2007), Dillanthology 1 (Rapster, 2009), Jay Stay Paid (Nature Sounds, 2009), and Donut Shop (a deluxe vinyl package featuring unreleased tracks and instrumentals, as well as Serato Control Tone and slip mats for DJs, issued on Stones Throw in 2010).