Lynn Massa may forget a lot of things, but he never forgets how to play the harmonica. “I have to check to make sure my head’s still screwed on sometimes,” he joked, “but I can always play a tune.” ...

Most nights, you can walk into a blues club and find a harmonica player blowing their heart out onstage. The wailing, honking sound associated with Western movies and juke joints is what many harp ...