Hey, I was wondering if there was anyway an Arduino could read and audio input and respond via LED or something. This might be a silly question but I've tried looking on the forums and Google searching things... Thanks for your help!

Arduino reading audio input

Grumpy_Mike February 11, 2010, 9:54am 5

That sort of thing can be done with an envelope detector.
This one was posted the other day:-
http://www.andregoncalves.info/ag_blog/?page_id=61

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