title: A C library for finding local maxima?
body: <p>I'm trying to write an audio analysis application, and I need to identify local maxima in a 2D array which represents a spectrogram. I've already got an open source library that can generate the spectrogram using Fast Fourier Transforms, but I was wondering if anybody knew of any good libraries to help me with actually finding the maxima? I'm not quite sure what to search Google for - the best I could think of was "numerical library" but that hasn't got me very far.</p>
  
  <p>Preferably in C, but I'm open to other suggestions.</p>