About Large Professor
William Paul Mitchell (born March 21, 1972), better known by the stage name of Large Professor (also Extra P. and Large Pro), is an American rapper and record producer. Based in New York City, he is a founding member of the underground hip-hop group Main Source, and is credited with having discovered and mentored fellow New York City-based rapper Nas. About.com ranked Large Professor at No. 13 on its Top 25 Hip-Hop Producers list. == Early life and education == William Paul Mitchell was born in Harlem, Manhattan, New York City, and raised in Flushing, Queens, New York City, where he attended IS 237 and John Bowne High School. == Career == Large Professor started making his earliest beats with two turntables, a Casio SK-1 sampler, and pause-tape cassettes before his mentor Paul C taught him how to use an E-mu SP-1200. During his pause tape phase he noted that some of his techniques were different than those of other producers. "I was trying to catch it from a different part of the record. I would catch it from the hi-hat when dudes were just catching it from the one kick. I would catch it from the third hi-hat and be flipping it." In 1989, he joined the group Main Source, which also included Toronto natives K-Cut and Sir Scratch.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.