"This performance is by the University of Northern Carolina Greensboro, conducted by Kevin Geraldi. The recording is also on iTunes: http://itunes.apple.com/us/album/mackey-hymn-to-blue-hour-single/id422892030 "
Thanks to John Mackey himself for the info, and for not suing us!
*I do not own this music or recording, but if you like it, do check out the iTunes link and John Mackey's blog.*