Opens, closes the CD / DVD tray, disc read:
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Read the, Insert the disk into the drive
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CD / DVD drive, disc read
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Bios, Sound signal of a bios computer
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Room noise, read, write, Hard disk
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Signal, interference, Modem connection
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General noise, Office work
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Turning on the computer, shutting, fan noise
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Computer interface, alarm
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Turn off the hard drive, Turn on
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Closes the CD / DVD tray, disc read, Opens
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Opens, closes the CD / DVD tray
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Floppy disk reading
★★★★★