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Mute or Unmute Your Microphone with pactl

Silence the system microphone from the terminal with pactl set-source-mute — a quick hardware-adjacent privacy switch for calls and screen sharing.

LinuxaudiomicrophonepactlpulseaudioLow risk
Run pactl set-source-mute @DEFAULT_SOURCE@ 1 to mute the microphone and pactl set-source-mute @DEFAULT_SOURCE@ 0 to unmute it.

01Command

Command
$ pactl set-source-mute @DEFAULT_SOURCE@ 1

02What it does

@DEFAULT_SOURCE@ always targets whichever microphone is currently the default input, so you don't have to look up device names. Use pactl list sources to see every input device, or set-source-mute @DEFAULT_SOURCE@ toggle to flip the state — handy when bound to a keyboard shortcut as a global mic switch. This mutes at the audio server level, which most apps respect, but desktop indicators may not reflect a mute made purely from the CLI.

03Risk

RiskLow risk
RequirementsPulseAudio or PipeWire (with pipewire-pulse), preinstalled on most desktop distros
!Warning: Muting in PulseAudio is software-level; a compromised system or an app using the device directly can bypass it, and you should still verify the mute state before sensitive conversations.

04Undo

Undo
$ pactl set-source-mute @DEFAULT_SOURCE@ 0

05Sources

  • pactl(1) — Linux manual page
    Arch Linux · community · 2026-09-17
    Evidence: Documents pactl set-source-mute SOURCE 1|0|toggle for muting and unmuting audio input (microphone) sources.
  • pactl(1) — Debian manual page
    Debian · community · 2026-09-17
    Evidence: Documents pactl set-source-mute for muting and unmuting audio input sources and the @DEFAULT_SOURCE@ shortcut.

Last verified: 2026-09-18 · Category: Security & Privacy