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Re:Show HN: Push-to-Talk for Pulseaudio by dsego on Wednesday May 13, 2020 @12:44PM (#23168784)
My Thinkpad has a microphone mute button with an indicator light and it works with Ubuntu. I find it very convenient to use.
Re:Show HN: Push-to-Talk for Pulseaudio by ORioN63 on Wednesday May 13, 2020 @06:08PM (#23172390)
Same. Works wonders.

But I had to configure the shortcut (Setup is i3 + pulseaudio + sxhkd):

    /*sxhkd/.config/sxhkd/sxhkdrc (lines 19-20)*/
    @XF86Audio{RaiseVolume,LowerVolume,Mute,MicMute}
      pulseaudio-ctl {up,down,mute,mute-input}