在开始播放节目信号源之前，必须把音量设定到最小。

The volume should be set to minimum before you begin playing the program source.

youdao

麦克风音量，ECHO音量和音乐主音量起始音量和限制音量设定功能；

The MIC, ECHO & music volume, its starting & limit the volume setting function;

youdao

若音量过大，使用耳机可能会损害您的听觉。请仅使用聆听对话或音乐必需的最小音量设定。

Listening to a headset at high volumes can damage your hearing. Use only the minimum volume setting necessary to hear your conversation or music.

youdao