American organist Cameron Carpenter became known both for his formidable technical prowess and the athletic showmanship of his performances. While his repertoire is classical, his persona is more that of a pop star than of a traditional classical musician. Carpenter rose to prominence as much on the basis of his outrageously virtuosic performances on YouTube as his commercially released recordings. His 2008 Telarc album Revolutionary was the first solo organ recital to be nominated for a Grammy Award. Vivien Schweitzer wrote in The New York Times, "He has pushed the boundaries...