Per 
Item: SCP-CCCC
Object Class: Safe
Special Containment Procedures: SCP-CCCC is to be kept in a padlocked and sealed safe with an 8 digit passcode. Personnel are not allowed access to SCP-CCCC unless they possess level 3 clearance or higher, and tests are to be administered in soundproof rooms with groups of no more than five individuals under direct supervision. In the case of test subject’s death, SCP-CCCC is to be switched off immediately as to prevent further casualties at the hand of its anomalous effect.
Any personnel who do not wish to be affected by SCP-CCCC while under testing conditions are required to wear heavy duty hearing protection that produces white noise. The entities’ effects can also travel through audio so long as it is live, though said effect will be neutralized if the audio is recorded and played elsewhere.
Description: SCP-CCCC appears to be a well-worn Sony CFD-510 Cassette tape player whose manufacture date and serial number do not line up with the model’s year of origin. It possesses a single strip of masking tape stretched across the top of the player’s left-hand speaker. The tape, despite being easily removed, will instantaneously return to its preferred location on the tape player within five minutes if not under direct supervision, and will automatically disappear so long as the viewer in any way breaks eye contact. The masking tape itself is roughly 7 inches long and will write an assortment of aggressive and angry comments on the tape to anybody who views it. Comments such as “Death to All,” “Rage is my sunshine,” and “Hark, flimsy mortals,” are especially common, though other comments have been made related to other emotions, such as (REDACTED) or “F███ O██."
The cassette player itself can run without any obvious source of power, though it is unable to turn itself on. The tape deck portion of the boombox is permanently closed and has an unnamed cassette tape stuck within it.
When turned on, either by the radio or the tape player, it will always be set to its highest volume, which is around 110 decibels, is unaffected by turning the volume nob, and will play three songs on loop:
- Barbie Girl, a 1996 song by danish band Aqua
- Baby Shark, a 2016 cover by South Korean education band Pinkfong
- I’m a Gummy Bear (The Gummy Bear song,) a 2007 song by German virtual band Gummibär
These songs otherwise have no altercations to their original and are not distorted nor remixed in any way and have been on the boombox since its recovery in 1991, in leu of these songs not existing at that point in time. Despite this, they cause great changes in the behavior of those who hear it. Lobotomies on postmortem D-class personnel killed by SCP-CCCC show that serotonin receptors in the brain are bolstered to accommodate for the increased production of said chemical, as well as an increase in heart rate and production of testosterone in both men and women. Cortisol and adrenaline are greatly increased as well. This combination of effects results in unkempt and abnormally aggressive rage for all subjects who are able to hear the tape. Everyone physically capable of hearing the noise, with the exception of the perpetrator of the tape's activation, will be adversely effected. The anomalous effects do not manifest if the songs were recorded either by audio/video feed unless the audio is live.
Behavior of infected individuals can vary greatly, though it usually starts with minor agitation before descending into a rage-addled state of mind by the end of the song, with effects lasting up to three minutes after the music has ended. If infected subjects are not dead by this point of time, anger caused by the songs will wind down until all parties involved will return to a normal state of mind.
Discovery: SCP-CCCC was discovered in ███ ███████, ██ in the year 19██. Severe rioting had plagued the area over the course of several days, First started over concerns of racial injustice but only amplified by the effects of SCP-CCCC. After a riot that resulted in the death of more than ██ bystanders due to various forms of manslaughter, Foundation forces intervened and traced the center of the riots to an otherwise unassuming Cassette tape player that was currently playing the song “Baby Shark,” multiple years before the song was even conceived. Reinforcements were called after the memetic effects of the tape itself manifested on the extraction team, who turned on one another with such aggression that only three of the original 15 members survived.
After the recovery of CCCC, amnestics were administered amongst the local populace and the story was rewritten as to hide the true nature of the riots, and CCCC has been in foundation custody ever since.
