来自《耶鲁大学开放课程：聆听音乐 第13集 第13集》

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  Is it inverting it?
  是转位吗
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  Yeah,it's just inverting it.
  没错 就是转位
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  It is taking the intervals and flipping them
  在音程上进行转换
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  and that's what composers love to do with fugues,
  作曲家们就喜欢这么写赋格
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  and I'll be talking about interchangeable parts,
  包括互换部分和对位关系
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  reciprocal relationships with the mathematical quality of fugues.
  就像数学一样精密
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  And so that's what's happening here.
  这里就是这样
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  We have a moment of melodic inversion.
  有一段旋律转位
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  And sometimes in fugues--
  有时在赋格中
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  and Bach's did this in the musical offering--
  巴赫在他的《音乐的奉献》中
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  he can take his fugue subject and run it backwards
  使赋格主题逆向开始
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  from beginning to end
  整首曲子这样