Among inductees of the National Inventors Hall of Fame, his name comes alphabetically after Louis Pasteur. In the Rock and Roll Hall of Fame, it follows Parliament-Funkadelic. This singular distinction belongs to Les Paul, whose insatiable curiosity and experiments gave us the musical instrument of the modern era - the solid-body electric guitar - and the predominant studio recording technique - multi-tracking. Audacious and indefatigable at every turn of his career - from small-town Waukesha to Harlem music haunts to Hollywood studios - Paul, at age 92, still holds court every Monday night at the Iridium Jazz Club in New York City. AMERICAN MASTERS explores the revolutionary results of his drive to create sounds that had "never been heard on earth" when Les Paul: Chasing Sound premieres Wednesday, July 11 at 9 p.m. (ET) on PBS.