Is anyone not going to die this summer? (That joke, I guess, is still kicking. Barely.) Les Paul-a virtuoso jazz guitarist who pioneered the practice of multitrack recording and invented what is still the most beautiful electric guitar ever made, the Gibson Les Paul-died of pneumonia today in White Plains, New York. He was 94. He was great and very, very important. Above, a video for “The World Is Waiting for the Sunrise,” the 1951 hit he recorded with his wife, Mary Ford.