If you have a CD player (last century tech) that had a karaoke button that's wha... | Hacker News

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		raverbashing on Oct 3, 2012 \| parent \| context \| favorite \| on: What strips vocals from audio when a 1/8' audio ja... If you have a CD player (last century tech) that had a karaoke button that's what happens when you press that button, the two channels are merged.

daeken on Oct 3, 2012 [–]

Not merged, but subtracted; in effect, taking one side out of phase and adding that. If you just merge them, common components (sounds in the middle) double, rather than canceling out.

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