The Nativity organ is a hybrid instrument, incorporating both pipes sounding from a windchest and digitally synthesized sounds played through various speakers. The pipes and windchest are part of the original Nativity organ, a Wicks pipe organ installed in the old nave in 1960. A new electronic Rogers console was installed in the new nave in 1993. In 1999, a generous gift from Jean Quay in honor of her grandchildren launched a project to combine the two organs into a single instrument.
The Reynolds Organ Company of Indianapolis built a new case for the old Wicks pipes and windchest, and added an additional rank of pipes to augment the original four ranks of Wicks pipes. The Rogers Organ Company of Indianapolis reconfigured the organ console to accommodate both the pipes and the electronic stops. The Walker Technical Company of New York provided additional electronic stops including the 32’ pedal stops and the large antiphonal Trumpet en Chamade, which sounds from above the sacristy.
In 2008, the large speakers which sound the 32’ and 16’ pedal stops were replaced. The flute pipes were revoiced by the Goulding and Wood Organ Company of Indianapolis, resulting in a richer, mellower tone. The organ then received a rigorous retuning and rebalancing along with other minor repairs.