quartertone

例句：

1. 1. The composer used quartertones to create a melodic harmony.
   作曲家使用四分之一音调创作出旋律和谐。
2. 2.Musicians often use quartertones to adjust the pitch of their instruments.
   音乐家经常使用四分之一音调来调整他们乐器的音高。
3. 3. In music, quartertones are used to describe intervals that are one-fourth of a semitone apart.
   在音乐中，四分之一音调用于描述半音之间相隔四分之一音程的间隔。