Back Masking and Reverse Speech

Back masking and reverse speech are two interesting and different angles to view music from. Back masking is the intentional insertion of a reverse message. Examples of this can be found in "Empty Spaces" by Pink Floyd and "Fire on High" by ELO. Usually, in these cases, the original lyrics are indistinguishable, but when played backwards reveal a very clear message. In these examples, the messages are actually acknowledging their existence. In "Empty Spaces", the message starts with "Congratulations. You have just found the secret message.". In "Fire on High" it begins with "The music is reversible" I really like this technique and I think it adds something more to music rather than the sound it adds when played forward. Adding back masking to music gives an extra connection to the listeners. Reverse speech, on the other hand, is unintentional. Examples of this are Paul McCartney's "Band on the Run" and Weird Al's "Nature Trail to Hell". In "Band on the Run" one can hear "Marijuana, marijuana. The law, the law will banish us". Ironically, Paul was banished from going to Japan years later because weed was found in his suitcase. In "Nature Trail to Hell", "Satan eats Cheez Whiz" can be heard when the song is listened to backwards. This message doesn't seem too far fetched for a Weird Al song. I personally believe that most of these examples are made up. They are hard to hear when you don't have the supposed message in front of you. However, when you do read what it says, things seem very clear. This effect, I think, is psychosomatic like many "phenomena". However, certain examples of reverse speech could be conscious. For example, in several Beatles songs, references to Paul being dead are found in the reverse speech. This is because of the conspiracy surrounding him. Many people believed that he was killed and replaced with a look-alike in 1966. Because the band found this funny, they often put "clues" in their songs and album covers. In one song, at the end, John shouts "Cranberry sauce" which was later to be misconstrued as "I buried Paul". The most prominent clues, though,  were found in reverse speech. In "I'm so tired" gibberish while played forward can be heard as "Paul is a dead man. Miss him, miss him, miss him" backwards. These examples, I believe, were intentional. In many other songs, however, the messages seem bogus; especially those referencing Satan. In order to find these, the discoverer had to be looking for them . Presumably those who dislike the artist.  Many people, when they do not like something, feel the need to give it a bad name. Finding hidden satanic messages is one way to do that.