Troubleshooting for alsamixer

$ alsamixer

If it has mute status, the lower bar string will be “MM”.
In the bellow image, Mic, Mic Beep is mute status.
You can change mute on or off , with “M” key.

You wanna make sure control key, you can show help menu with “h” key.

PulseAudio/Troubleshooting

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