title: Compare two spectrograms in iOS
body: <p>I am drawing spectrograms using the sample code aurio touch provided by apple. Now I want to compare the two spectrograms in iOS to see if they are same. Is it possible to compare the two spectrograms using the Accelerate framework? </p>
  
  <p>If it is possible, does anyone know how to compare two spectrograms? If not, is there any other algorithm or library which can be used in iOS for comparing spectrograms?</p>