Steve Jordan, a drummer, began working as a studio musician while he was still in high school in the 1970s. By age 19, he was performing with the “Saturday Night Live” band and touring with the Blues Brothers.But he said he had quickly realized that if he wanted to be financially successful, he’d have to do more than make music. He’d have to have control over that music.“I knew early on that I couldn’t have all my eggs in one basket and be a successful musician,” said Mr. Jordan, now 64. “You have all these musicians out …
