Aerial Pandemonium Ballet is a 1971 album by Harry Nilsson, and one of the first-ever remix albums, years before they became commonplace in the late 1970s and 1980s onwards.
With the successes of "Everybody's Talkin'" and The Point! creating demand for Nilsson recordings, a reissue of his first two RCA Victor albums (Pandemonium Shadow Show and Aerial Ballet), then out of print, was considered. Nilsson thought that his early albums already sounded a bit dated by 1971. So he went back into the studio with the master tapes, remixed, tweaked, and re-recorded vocals, and came up with a new consolidation which he titled Aerial Pandemonium Ballet.
It is a matter of intense debate among Nilsson fans whether this was a good idea. Reviewer Stephen Thomas Erlewine, on allmusic.com, describes the result as "just old tunes presented in slightly new, slightly off-putting ways."