title: timidity : couldn't open output device
body: <p>I have installed timidity on a dedicated Linux server.
  when I try to convert a midi to a wav or mp3:</p>
  
  <p>timidity toto.midi -Ow -o out.wav</p>
  
  <p>I always get an error
  <strong>couldn't open output device</strong></p>
  
  <p>Any idea ?</p>
  
  <p>regards</p>