来自《耶鲁大学开放课程：聆听音乐 第18集 第18集》

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  because there are dampers
  因为琴内有制音器
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  There are pieces of felt up on top of the string,
  就是那些琴弦上方的毛毡
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  but I can lift all those pieces of felt, those dampers,
  但是我可以将这些制音器都抬起来
• 
  
  just by pushing that pedal down, and then I get
  只要踩下那个踏板 我就得到这样的声音
• 
  
  so the dampers are now up
  那些制音器都抬起来了
• 
  
  So we call this the sustaining pedal or the damper pedal,
  所以我们称之为延音踏板或者制音器踏板
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  sustaining pedal more often
  更多被称为延音踏板
• 
  
  And the other one is the one all the way to the left
  另一个是最左边的踏板
• 
  
  You can--what's happening here?
  你们看发生了什么
• 
  
  A. J, look at the keyboard here if you will
  A. J 看键盘这里
• 
  
  What's happening?
  发生了什么
• 
  
  Can you see what's happening to the keyboard
  你们能看到在我踩下左边的踏板时