title: How to add noise to wav file using python?
body: <p>I have a clean wav, and a wav containing a pre-generated noise, and I would like to add the noise to the clean wav file, to create a noisy wav.</p>
  
  <p>I saw <a href="http://uk.answers.yahoo.com/question/index?qid=20100407103425AA1oBjf" rel="nofollow">here</a> this can be easily done with matlab.</p>
  
  <p>How can this be done with python?</p>