In the year 600, the planet is singing.

Three hundred million humans share the world with an undiminished biosphere. The oceans are unpolluted. The forests unbroken. The atmosphere holds 280 parts per million of carbon dioxide — unchanged for millennia.

The Schumann resonance pulses at 7.83 hertz. Lightning fires renew the prairies. Glaciers breathe. Whales call across pristine seas.

Eight voices of a living Earth — transposed into audible sound.