title: Automatically play sound in IPython notebook
body: <p>I often run long-running cells in my IPython notebook. I'd like the notebook to automatically beep or play a sound when the cell is finished executing. Is there some way to do this in iPython notebook, or maybe some command I can put at the end of a cell that will automatically play a sound? </p>
  
  <p>I'm using Chrome if that makes any difference.</p>