A musical prodigy, Carpenter sang at the Metropolitan Opera as a solo boy soprano, and performed J.S. Bach's Well-Tempered Clavier when he was 11. He studied organ with Gerre Hancock, John Weaver, and Paul Jacobs at Juilliard, where he received his bachelor's and master's degrees. From 2008 until 2009, he was artist-in-residence at New York's Middle Collegiate Church, where he designed the organ. In Carpenter's designs for virtual pipe organs, the pipes are replaced by sampled sounds that are mixed and amplified with such sophistication that the sound is nearly indistinguishable from that of a traditional organ. Besides performing, Carpenter has made organ arrangements of over 200 works originally for piano or orchestra, and it was the performance of one of them, Chopin's Revolutionary Etude, that first brought him to the attention of the public when it was broadcast on YouTube and landed him a multi-disc contract with Telarc. He is also a composer, and while he is known largely for his own works and transcriptions, he is devoted to the repertoire of traditional organ literature.