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how is digital sound created?

So sound is a vibration which is created from things rubbing or banging together etc. If stuff isn't interacting with something to create a sound how are sounds created from nothing? I.e in the digital world? Music on an iPod or a beep from a computer? I have always wondered what the noise's are and that come from computers when they are 'thinking' or working - wtf's going on there?

lucaspeni
jasonbourne52's avatar
jasonbourne52
2,863 posts
 
All sound is produced by something vibrating in air. Intercranial stimulation has not been perfected yet!
jasonbourne52's avatar
jasonbourne52
2,863 posts
 
"In Space no one can hear you scream" - advertising blurb for the film Alien.
noromance's avatar
noromance
10,182 posts
 
Digital devices generate the sound internally or sample the sound externally. Those electronic "frequencies" are converted to analog waveforms which can be amplified to drive a transducer (speaker) which moves the air.
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