text: IN THE KEY OF F-MINOR (7th) The city blocks of seventy story (and higher) skyscrapers collapsing from the shock of the pulsed wave cannon resonated at 21.827Hz, if only for a brief moment. It was a low hum, but it was a strong foundation to build with. The miles of automated vehicle assembly plants; 29.956Hz. But there was a certain angle the phased picowatt laser array had to burn through them, starting at the foundations and working it's way up through the infrastructures three or four at a time. It was a gentle, almost fragile sound. Timing the spin-up of the mass driver was tricky, but it paid off: 32.703Hz vibration frequency as the thousands of tons that had been a section of a mountain, now traveling at twice the speed of sound, devastated the remaining megalopolis. A firm and true note. Something was missing, though. The AI on board the mobile weapons platform tutted as it cycled through it's library of weaponry looking for the perfect device to finish. In the span of nanoseconds, it settled on the ideal coup de grâce . The protective shielding covering the quadruple canisters of missiles slid smoothly out of the way. Each missile contained twenty-four multiple independently-targeting re-entry vehicles, with every warhead armed with a nuclear payload. All four launched in a shallow arc into the stratosphere. As the umbrella of destruction rained down, vaporizing the horizon, the landscape itself shook at a perfect 38.891Hz, a pleading but impactful E flat. The AI hummed along with this perfect chord, satisfied.