注意如果当前的声音输出设备不支持音量控制(就像设备A2DP)，音量滑块就不会显示，取而代之的是设备名称。
Note that when the currently active audio output device does not support volume control (such as an A2DP device), the volume slider is replaced by the appropriate device name.
但是最终输出的音量始终应该是由系统音量控制的，无论是使用音量按钮还是音量滑块。
But the volume of the final audio output should always be governed by the system volume, whether it's adjusted by the volume buttons or a volume slider.
个别通道音量控制和立体声缩混5.1/7.1模拟音频输出的音频播放添加的选项。
Audio playback options added with individual channel volume control for stereo downmix and 5.1/7.1 analog audio outputs.
个别通道音量控制和立体声缩混5.1/7.1模拟音频输出的音频播放添加的选项。
Audio playback options added with individual channel volume control for stereo downmix and 5.1/7.1 analog audio outputs.
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