SCP-1012 : Secret Chord

The Foundation has implemented protocols to cancel or to reduce the risk of generation of three of the five constituent sound tones that comprise SCP-1012:

• Frequency B and Frequency D: Frequencies B' and D' are, respectively, the antiphases of Frequencies B and D. These antiphase frequencies cancel frequencies B and D, respectively, within the range of the broadcast.
  • The Foundation operates sound detection and active noise cancellation broadcast devices in 36 locations worldwide, which continually monitor for Frequencies B and D, and, when appropriate, broadcast cancellation signals at Frequency B' or D'.
  • Additionally, the Foundation has arranged for most of the world's electroacoustic transducers to monitor for Frequencies B and D and, when necessary, broadcast Frequencies B' or D'. This has been achieved through a combination of inserting design changes into the engineering specifications of most commonly-manufactured electroacoustic transducers manufactured since 1988, inserting Frequency B', D' or both into the transmission of broadcast media and the encoding of recorded media (including inserting design changes into the engineering specifications of recording appliances so that Frequency B', D' or both are automatically encoded), and by manipulating the supply frequencies of commercially transmitted and distributed electric power so as to cause sound equipment and other electric appliances to be capable of sympathetically generating Frequency B' or D'.1
• Frequency C: In the wild, most instances of the generation of Frequency C had consisted of the whalesong of Balaenoptera svalbardi, the Svalbard whale. Through Foundation efforts, Balaenoptera svalbardi became extinct in 1982, thereby decreasing the likelihood that the tone would inadvertently be generated in a location near the generation of other constituent tones.

• The Foundation operates sound detection and active noise cancellation broadcast devices in 36 locations worldwide, which continually monitor for Frequencies B and D, and, when appropriate, broadcast cancellation signals at Frequency B' or D'.
• Additionally, the Foundation has arranged for most of the world's electroacoustic transducers to monitor for Frequencies B and D and, when necessary, broadcast Frequencies B' or D'. This has been achieved through a combination of inserting design changes into the engineering specifications of most commonly-manufactured electroacoustic transducers manufactured since 1988, inserting Frequency B', D' or both into the transmission of broadcast media and the encoding of recorded media (including inserting design changes into the engineering specifications of recording appliances so that Frequency B', D' or both are automatically encoded), and by manipulating the supply frequencies of commercially transmitted and distributed electric power so as to cause sound equipment and other electric appliances to be capable of sympathetically generating Frequency B' or D'.1

All documentation that specifies the constituent sound tones of SCP-1012 is to be kept strictly confidential.