How does volume work on computers? How does my computer bring the volume up or down?
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The speaker is a surface attached to something that moves it back and forth, roughly along a line. The computer is controlling the surface’s position along the line. The pitch of the sound is determined by the frequency that the surface moves back and forth. The loudness is determined by the distance that it moves along the line.
I’m not certain, but it’s probably a voltage that determines the speaker’s position. To increase the loudness, the computer will multiply each voltage of the signal by a number larger than one.
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