Josh Jones wasn’t expecting to lose his dream job that day. He had heard some grumbling during his time as the principal percussionist with the Kansas City Symphony, but everyone agreed that he was a stunning performer — not to mention the first Black musician in the orchestra’s history to land a leadership position. In his first season, his marimba solo in a Vivaldi performance prompted the maestro himself to send a handwritten note: “I am so happy to make music with you,” Michael Stern wrote, “and there’s no doubt everybody onstage agrees.”