Dubbed the Horn Doctor, Mike Corrigan is a master repairman and craftsman of brass instruments who owns B.A.C. Horn Doctor, a repair shop and horn manufacturer in Olathe, Kansas. In addition to his shop, he also owns a mobile instrument repair truck that he uses to follow high school and college marching bands to fix instruments on the spot.

When Hurricane Katrina decimated New Orleans, his thoughts flew to the music scene. “We had some musicians that were displaced up in Kansas City,” he ...