title: Background Music in Adobe Flash keeps duplicating?
body: <p>I have a problem with my background music.
  So I added this code on frame 1:</p>
  
  <pre><code>var bmsound:Sound = new backgroundmusic();
  var channel:SoundChannel;
  channel=bmsound.play(0,10000);
  </code></pre>
  
  <p>And it works like a charm. The problem is, when I navigate to other frames and go back to frame 1 again, the music plays again, so there are two sounds playing in the background. Everytime I go back to frame 1 it plays the music again so there are a lot of sounds playing in the background.
  How do I fix it? 
  Thank you so much.</p>