1. 构造函数
  2. AudioBuffer
  3. 属性
  4. duration
  5. hashCode
  6. length
  7. numberOfChannels
  8. runtimeType
  9. sampleRate
  10. 方法
  11. copyFromChannel
  12. copyToChannel
  13. getChannelData
  14. noSuchMethod
  15. toString
  16. 运算符
  17. operator ==