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Re:Let's Build an MP3 Decoder by route66 on Monday February 06, 2012 @08:05AM (#3557233)
> that's why the music on CDs is sampled at 44.1kHz (40kHz with some safety margin)

A nice explanation of the 44.1kHz is here: http://www.cs.columbia.edu/~hgs/audio/44.1.html

Initially digital video tracks were used and as such they were constrained by the video formats commonly recorded on them and the playback devices coming with that.

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