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Spectrum analyzer

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smc

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Would someone be able to suggest the parts to look up (or provide links or books to read) to build a spectrum analyzer. I read New to Electronics F.A.Q. and still do not know what I should be looking for.

I would like to have a bunch of LEDs move to the music, powered from a wall outlet. I program in C++, Perl, Java, etc. on linux.

Thanks!
 
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