title: How to edit raw PCM audio data without an audio library?
body: <p>I'm interested in precisely extracting portions of a PCM WAV file, down to the sample level.  Most audio modules seem to rely on platform-specific audio libraries.  I want to make this cross platform and speed is not an issue, are there any native python audio modules that can do this?</p>
  
  <p>If not, I'll have to interpret the PCM binary.  While I'm sure I can dig up the PCM specs fairly easily, and raw formats are easy enough to walk, I've never actually dealt with binary data in Python before.  Are there any good resources that explain how to do this?  Specifically relating to audio would just be icing.</p>