After the physical construction of the pyramid some esoteric traditions called for the activation of the pyramid so that it would take its proper place in the cosmos, mediating between earth, heaven and the humans who partook of both realms.
This music is a an invocation for the "activation" of the Great Pyramid of Giza. Some researchers have determined that the natural resonance of Thoth's Sacred Chamber in the center of the pyramid has a musical pitch of F#. Acoustic measurements of the winds that encircle the pyramid also have the same resonance.
A few investigators believe that the ancient Egyptians knew that the resonant frequency of the Earth itself is a fraction of the same F# pitch. Another fragmentary scroll instructs the musicians/priests to perform their invocation ceremony exactly three times.
