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Low frequency buzz tone alien machine loop
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Smooth low pitch alien atmospheric tone
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Distant constant low throbbing square waves
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Looped descending glassy chords with theramin tones overlayed
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Quick high pitch spaceship in motion
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Slow and deep distant passing spacecraft
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Random series of sharp tones and noise, corse
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Tense building rising multi-tonal layered drones
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Various synth tones and noise modulating in pitch and intensity
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Quick and high pitch passing spacecraft left to right