In 1913 Reger recorded organ rolls of Nos. 20, 23, 25, 33, 45, 50 and 52 on the mechanical Philharmonic Organ ("Philharmonie-Orgel") of the Welte Company. Welte brought out this organ in 1911, displaying it that year at the World Exhibition in Turin. Two years later they solicited recordings from well-known organists on an improved model in their factory in Freiburg.