I'm trying to write a sound analysis application, and I need to determine the local maxima in a 2D array, which is a spectrogram. I already have an open source library that can generate a spectrogram using Fast Fourier Transforms, but I was wondering if anyone knows of any good libraries that will help me find the really maximum values? I’m not quite sure what to search on Google - the best I could think of is a digital library, but it’s not very far from me.
Preferably in C, but I'm open to other suggestions.
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