American organ virtuoso Frederick Hohman demonstrates the Wicks Opus 6419 pipe organ at First Congregational Church in Kalamazoo, Michigan USA, with several works from the standard pipe organ repertoire, in addition to several arrangements and "mash-ups" authored and arranged by Frederick Hohman, and one all-original work written under Frederick Hohman's nom de plume: Carlos Xavier Santiago. This recording was originally released in 2006 as a promotional Compact Disc for the Wicks Organ Company, with the organist not identified, manufactured by Pro Organo and distributed under an exclusive license from the Pro Organo label, with the title "Unseen Servants." Frederick Hohman was the artist for all tracks on the original release, which is now re-released in the Pro Organo catalog.