A Particle Accelerator?
The original Great Pyramid had an outer casing over what we see today. Between the Pyramid walls and the casing was an air space.
The ball sits in the "coffer", and spins, creating an electromagnetic field. The air (gas) particles in the Kings Chamber become charged. These charged particles can then be sent out via the Kings north air (ventilation) shaft into the space between the walls and casing.
The vibrations from the disks in the Gallery mix with the vibrations in the Antechamber, and can be directed out to the Earth Grid (Blue Grid) via the Kings south air shaft.
Vibrations from the disks are also sent to the Queens Chamber via the Queens south air shaft. From here they are sent via the Queens north air shaft into the pyramid and on into the Earth.
The energy vibration of the sun and stars are also sent into the Pyramid via the hollow gold capstone, added to the energy in the air space between the walls and casing. The walls absorb this energy and send it also down into the Earth.
Vocal vibrations (incantations?) from the priest in the Subterranean Chamber could be sent via the "pit" shaft to the Gallery. In this chamber the music could be heard via this shaft, and the vibrations from the disks could be used for healing and visions. People entered this chamber from the Pyramid entrance on the south.
If the descending passage continues down and over to Osiris Tomb (which I believe is so), the vibrations can all be sent to the Tomb from the Subterranean Chamber shaft. It would also mean that Osiris, having "risen", could enter any of the Chambers without having to go outside the Pyramid or its passages. If god was not to be seen by mortal man, and Osiris could not go into sunlight, then this would be the ideal configuration.