There are two artists with this name:

(1) John Howard Carpenter (born January 16, 1948) is an American film director, screenwriter, producer, actor, and film music composer. He is considered to be one of the best directors of modern horror, although he has made films in a number of other genres.

With the exception of The Thing, Starman, and Memoirs of An Invisible Man he has scored all of his films (although some are collaborations), most famously the themes from Halloween and Assault on Precinct 13. His music is generally synthesised, with accompaniment from piano and atmospherics.

http://www.johncarpenterforum.com

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(2) Pianist John Carpenter is Music Director of Pleasant Run Presbyterian Church in
Cincinnati. He has a Master's degree in Piano which he earned at Manhattan
School of Music in New York City.

He had further studies privately in New York and, later, as a Scholarship student
at College-Conservatory of Music, University of Cincinnati where he appeared on
stage with the Cincinnati Ballet at the Aronoff Center, and on Classical WGUC.

John has been a church Music Director and Pianist for several churches over the
past decade. He is also a published writer, especially on musical subjects and
of short plays.


For reference:
http://cdbaby.com/cd/johncarpenter