A virtuoso composer-performer who is unique among keyboardists, Cameron Carpenter’s approach to the organ is smashing stereotypes while generating a level of acclaim and exposure that is unprecedented for his instrument. His return appearance after his 2013 SMF debut at Christ Church features his International Touring Organ, a portable, digital instrument that he conceived of and designed with organ builders Marshall and Ogletree and that he debuted in a concert at Lincoln Center last year. Despite what organ purists might call his sacrilegious embrace of the unorthodox, Carpenter insists that he is a traditionalist, even though he’s the first organist ever nominated for a Grammy award. With his ambition, visual flair, technological savvy, inclusive tastes and bold, boundary-breaking musicianship, Carpenter is bringing the organ, along with those who would resist changing it, into the 21st century.