 Item number SCP-1433 Object Class Safe Special Containment Procedures A single copy of SCP-1433 is to be kept in a fireproof safe in the archived room at Site-72. Unsecured devices for the use of playing-back audio cassettes are not to be allowed on site. No personnel are to listen to SCP-1433, except for D-class assigned for testing purposes. All such tests shall be conducted in a fully soundproof chamber. The Foundation is to monitor physical and digital means of audio distribution for any evidence of recordings displaying similar properties to SCP-1433. Any other recordings demonstrating such effects are to be confiscated and destroyed, and any persons affected by them are to be terminated or conscripted as D-class. Description SCP-1433 is a recording of an unknown artist performing 4 minutes 33 seconds, an avant-garde musical piece originally composed in 1952 by musician John Cage. The sole known copy of SCP-1433 is currently contained on an audio cassette of the type widely manufactured in the 1980s. The recording is present on both sides of the cassette. Once placed into any device capable of playing back sound from a cassette and playback is started, the recording will play in its entirety at a constant volume of 30 decibels, regardless of the original volume setting of the device. Attempts to stop playback of SCP-1433 by stopping or pausing the player or by removing its power source have been unsuccessful, only disconnecting the playback device from the audio output has proven successful. All copies made of SCP-1433 display the same anomalous properties as the cassette recording, regardless of the storage medium used. As with the original version of 4 minutes 33 seconds, the recording begins with the sound of the performer seating his or herself at a piano bench and closing the lid. This motion is repeated after another two minutes and forty seconds. One minute and twenty seconds after that, the performer opens the lid a final time, stands up and walks away. All other sounds on the recording consist of the performer breathing and turning through pages of sheet music, and of incidental sounds presumably made by an audience. EEG readouts of persons listening to SCP-1433 demonstrate evidence of atypical electrical activity commonly associated with enterograde amnesia and musical agnosia. Persons listening to SCP-1433 report hearing a low male voice speak briefly after the second opening and closing of the piano lid. Acoustic analysis of SCP-1433 has failed to identify this voice on the original recording. Descriptions of what the voice is saying are inconsistent, and few exposed have reported hearing the same statement. All persons exposed to SCP-1433 reported the voice's male and speaks a single sentence in English, typically of a nihilist sentiment, and typically referencing 20th to 21st century English-language popular music. Statements reported to have been made by the voice include The words of the prophets are written on the subway walls. I don't believe in the Beatles. It's better to burn out than to fade away. There is no dark side of the moon, really matter of fact it's all dark. Not a word was spoken, the church bells all were broken. It's all been done, it's all been done, it's all been done before. Are we cool yet? Following exposure to SCP-1433, subjects display symptoms of a psychological impairment similar to acute amnesia. The individual is completely unable to recognize, hear, or sense any form of rhythmic music, whether sung, vocalized, performed live on a physical or synthesized instrument, or played back on a recording. Effectives have stated a complete inability to hear any music being played or performed in their presence, even when an instrument is being played in their field of vision and they state an awareness that it should be audible. Many EEG readouts on persons so affected show an absence of brain activity indicating the sensation of auditory activity. This state is permanent, it has shown no indication of being affected by amnestics. Aside from chronic psychological ailments induced by the inability to experience music, no other long-term effects of exposure to SCP-1433 have been noted. Addendum on ██████ A test was conducted in which D-8502, a Caucasian male 67 years of age, was exposed to SCP-1433. In following tests, D-8502 reported that he was still able to hear music of the hip-hop genre when played back to him. In subsequent interviews, D-8502 expressed a strongest taste for hip-hop and rap music, stating that it was just a bunch of damn noise and doesn't even count as real music, and that he was unable to hear elements of such songs that had been sampled from pre-existing material of other genres. It is currently hypothesized that the amnesia induced by exposure to SCP-1433 is related to the effect these personal understanding of what constitutes music. Over-testing is deemed necessary to confirm this hypothesis.