 For the 1929 sound version, Universal purchased a pipe organ from  the Robert Morton Organ Company in Van Nuys, California. It was  installed on Stage 10 which was first used for filming and quickly  converted for scoring music as well as doing Foley sound effects  work. That organ was used for scenes where Erik plays the organ in  his basement lair. The organ was used in several Universal feature  film scores including "The Bride of Frankenstein" (1935) and "Ghost  Story" (1981) as well as a few episodes of TV series produced by the  studio. It was sold sometime in the late 1990s.