
Terrace Martin in Los Angeles in March.GL Askew II for NPRhide caption


Kanye West with, from left, Pusha T, Steven Victor, Kid Cudi and Travis Scott, at Madison Square Garden in New York City February 11.Dimitrios Kambouris/Getty Images for Yeezy Season 3hide caption

Beyoncé, on set for the "Formation" video shoot.Courtesy of the artisthide caption

Mannie Fresh behind the decks at NPR's Washington, D.C. headquarters.Becky Harlan for NPRhide caption
Terrace Martin in Los Angeles in March. GL Askew II for NPR hide caption
Dean Blunt, left, with the other two members of Babyfather, Escrow and Gassman, who have just released BBF Hosted by DJ Escrow. Richard Blackwood/Courtesy of Backspin Promotions hide caption
Saul Williams in Los Angeles in January. GL Askew II for NPR hide caption
Mr. MFN eXquire in Los Angeles in January. GL Askew II for NPR hide caption
Freddie Gibbs in Los Angeles in December. GL Askew II for NPR hide caption
Pusha T in Los Angeles in December. G L Askew II for NPR hide caption
Mac Miller in Los Angeles in September. Note the Beats, Rhymes And Life tattoo on his right wrist. G L Askew II for NPR hide caption
Masta Ace in New York in July. Polina Yamshchikov for NPR hide caption
Large Professor earlier this year. Sun Bronx/Courtesy of Distrolord hide caption
Large Professor at an event in New York City in April, 2013. Cindy Ord/Getty Images hide caption
Vince Staples onstage in Sacramento in May. Tim Mosenfelder/Getty Images hide caption
Ali Shaheed Muhammad onstage during Microphone Check's live interview with Father in Atlanta in May. Amanda Greene for NPR hide caption
Father onstage at Terminal West in Atlanta May 18. Amanda Greene for NPR hide caption
Microphone Check onstage with Organized Noize in Atlanta. From left to right: Frannie Kelley, Ray Murray, Rico Wade, Sleepy Brown and Ali Shaheed Muhammad. Amanda Greene for NPR hide caption
Ali Shaheed Muhammad at NPR's New York City studio in March. Polina Yamshchikov for NPR hide caption
Iamsu in NPR's New York studio in March. Polina Yamshchikov for NPR hide caption
Amber London during her interview with Microphone Check during SXSW in March 2015. Katie Hayes Luke for NPR hide caption
Video still from a Microphone Check interview featuring OverDoz. Shot during SXSW Music Festival in March 2015. NPR Music Video hide caption
Hank Shocklee, of Public Enemy's production team The Bomb Squad, in Austin, Texas for an interview with Microphone Check. Mito Habe-Evans/NPR hide caption
Heems at SiriusXM New York City Studios in March. Robin Marchant/Getty Images hide caption
Malcolm Spellman after an interview with Microphone Check in Austin, Texas, during SXSW 2015. Mito Habe-Evans/NPR hide caption