title: How to create a pydub AudioSegment using an numpy array?
body: <p>I have the following code in python</p>
  
  <pre><code>from scipy.io.wavfile import read
  rate, signal = read('./data/input.wav')
  # get only one channel
  signal = signal[:,0] 
  # do a bunch of processing here
  </code></pre>
  
  <p>Now I want to create an pydub segment using 'signal' and 'rate'</p>
  
  <pre><code>audio_segment = pydub.AudioSegment()
  </code></pre>
  
  <p>So how can I create this audio segment, and after that, 
  how can I get back my signal as an numpy array?</p>