本地立体声检查
立体声测试
播放本地左、中、右音以检查扬声器、耳机和录音设置路由。
测试立体声通道
通过输出设备播放短音，并可选择检查麦克风通道设置。
Ready to play a channel tone.
Keep volume comfortable. These tones are short and generated locally with Web Audio.
Microphone channel check
Grant microphone permission to inspect channel settings.