WarpAcolytes of the Cult Mechanicus have reported a disturbing incident: all vox-systems on the middle decks started broadcasting otherworldly sounds, whistling a haunting melody. The strains of monstrous music drove people into a frenzied dance that could not be stopped. Several hours later the vox-devices fell silent, and the dancing crew members fell lifeless. The area was cleared and the bodies of the deceased were disposed of with the necessary precautions.