For the seven young men in the Hypnotic Brass Ensemble, 'brotherhood' is literal: they're all sons of jazz legend Phil Cohran. Raised on Chicago's South Side, the boys joined the family band at age four, learning to play the trumpet, tuba, drums, French horn, cornet, and trombone. Now young men in their 20s and 30s, they make transcendent music that ties currents from jazz and funk to soul and hip-hop. Together they have toured six continents, playing with Prince and Mos Def, among others. Their song, "War" was featured in the hit movie, The Hunger Games.