fractional-octave

例句：

1. 1. The sound of the piano is a perfect representation of its fractional-octave range.
   钢琴的声音完美地展现了其分数八度的音域。
2. 2.In music theory, a fractional-octave is used to describe the difference between two notes.
   在音乐理论中，分数八度用于描述两个音符之间的差异。
3. 3. The composer used a fractional-octave technique to create a unique soundscape for his piece.
   作曲家使用分数八度技巧为他的作品创造了独特的音响效果。