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by xyzzy_plugh
3833 days ago
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Not sure about OP, but I've always loved the simplicity of counting the zero cross-overs in one direction (E.g. positive to negative) with some gutter. With raw PCM this is trivial to implement in any language -- I last did this in bash. Then you just do a look up from frequency to note and you're done. It's also not very CPU intensive, and you can even sample less frequently and get pretty great results. |
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