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Comment on Ask HN:Why do in-ear plugs have left and right marked on them?

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Songs are recorded in left and right channels, for the stereo effect.

Can you provide some links to more details on "left and right channels", "stereo effect" etc.?

Well, I didn't want to link to Wikipedia in my answer, but here you are:

http://en.wikipedia.org/wiki/Stereophonic_sound

Everything is here: from history to how it works. I hope this gets you satisfied! And btw, I also check which one is the correct... and in my brand new Sennheiser, it is pretty hard to find where it is engraved!

Thanks a lot! I should have found that on my own! DUH!

Nevermind, two hours ago I would have had a hard time finding it (after lunch almost-sleep-state)

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