axially varying pitch

例句：

1. 1. The tuning of the piano is crucial for a good performance.
   钢琴的调音对于好的表演至关重要。
2. 2. The sound of the flute varies with the player's axial position.
   长笛的声音随着演奏者的轴向位置而变化。
3. 3. The pitch of the song changes according to the rhythm of the music.
   歌曲的音调根据音乐的节奏变化。