The message appears in the song "Perfect Sense Part 1", in which Waters' backmasked voice says, "Julia, however, in light and visions of the issues of Stanley, we have changed our minds.
The song features feedback, distorted drumming, and backmasked vocals.
ELO, after being accused of Satanic backmasking on their 1974 album Eldorado, included backmasked messages in two songs on their next album, 1975's Face The Music.
Backmasked words are unintelligible noise when played forward, but when played backwards are clear speech.
Various fundamentalist Christian groups have declared that Satan or Satan-influenced musicians use backmasked messages to subliminally alter behavior.
Pastor Gary Greenwald claimed that subliminal messages backmasked into rock music induce listeners towards sex and drug use.
Following the growth of the Internet, backmasked message searchers used such software to create websites featuring backward music samples, which became a widely used method of exploring backmasking in popular music.
Reverse speech advocate David John Oates claimed that "Highway to Hell", on the same album, contains backmasked messages including "I'm the law", "my name is Lucifer", and "she belongs in hell".
Some editing programs will allow you to preview the backwards version of the song before converting it to the backmasked form.
Though the backmasking controversy peaked in the 1980s, the general belief in subliminal manipulation became more widespread in the United States during the following decade, with belief in Satanic backmasking on records persisting into the 1990s.
The Beatles, who incorporated the techniques of concrète into their recordings, were responsible for popularizing the concept of backmasking.
