title: Audio Streaming from OS
body: <p>I would like to interface with the output of my computer's audio and generate a visualization of that audio with fft's. </p>
  
  <p>My question is "Where do I get the audio output stream of my computer? Are there any useful libraries for this purpose?" All the examples I've looked at stream from files, which isn't very useful to me.</p>
  
  <p>I'm hoping to work in golang and linux.</p>