title: How to read raw values of 3gp / AMR-NB audio format?
body: <p>In my Android application I am recording the user's voice which I save as a .3gp encoded audio file. </p>
  
  <p>What I want to do is open it up, i.e. the sequence x[n] representing the audio sample, in order to perform some audio signal analysis. </p>
  
  <p>Does anyone know how I could go about doing this? </p>