The jazz saxophonist and Kendrick Lamar collaborator Kamasi Washington is a magnet — whether it’s his stature or his playing, you can’t help but notice him. He’s in the spotlight. Music has taken a pivotal role in promoting racial equality in the US. What has been dubbed “the second civil rights movement” is unfolding, like the first, against a backdrop of music. The Epic, Kamasi Washington’s groundbreaking solo album, is part of all this. His own band “The Next Step” is a modern spin on a big band, with two drummers, two upright bass players, 3 horns, piano and vocals.