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Im working on a Software Project where our team needs to record a train horn sound. We have purchased the recorder; its saved as a .wav file. We now need to extract data from the file like frequency and amplitude to create spectrum analysis and decibel level graphs. Any C# libraries out there for this type of thing?
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We're using the Intel Performance Primitives library for this stuff (like FFT). It has a useable C# wrapper, or you can call it with P/Invoke
I haven't tried this myself, but exocortex may be of use.
This CodeProject article has code that can grab amplitude and frequency. Not sure if that covers everything you need.