"Citizen Kane"s sound was recorded by Bailey Fesler and re-recorded in post-production by audio engineer James G. Stewart, both of whom had worked in radio. Stewart said that Hollywood films never deviated from a basic pattern of how sound could be recorded or used, but with Welles "deviation from the pattern was possible because he demanded it." Although the film is known for its complex soundtrack, much of the audio is heard as it was recorded by Fesler and without manipulation.