Have you heard of where Rock Bands supposedly had satanic messages hidden in their records and if you played a record backwards at a slow speed you could actually hear these satanic messages? What about people that swear they are hearing a conversation in another room of the house when no one is there? A common one is people saying they can hear a musical tune when there is no radio in sight. Audio pareidola is the culprit (and a bit of Musical Ear Syndrome too). Lets break it down.