The drone and the silence of an alien device:
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Low frequency drone, Spaceship in flight
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Engine noise, Spaceship in flight
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Spacecraft control panel
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Shot, Charging a laser weapon
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Inside a spaceship, room noise
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Cosmic sounds
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Black hole, time travel, Cosmic sounds
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Spacecraft engine noise
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Spaceship flies by
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Launch, Jetpack, move
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Drone, Spaceship flies by, identification
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Alien device, work, stop, start
★★★★★