equalizer bar equalizing

例句：

1. 1. The engineer used an equalizer to adjust the sound levels.
   工程师使用均衡器来调整声音水平。
2. 2. The singer had to use an equalizer to compensate for the different frequencies in the music.
   歌手不得不使用均衡器来补偿音乐中不同频率的差异。
3. 3. The audio engineer adjusted the equalizer settings to achieve a balanced sound.
   音频工程师调整了均衡器设置，以获得平衡的声音。