BASH & ZSH Script that (using AppleScript) allows for the adjustment of speaker AND MICROPHONE volumes from CLI.

readme.md

Control MacOS System Audio from CLI? (Yes, Please.)

Scripts to control both the microphone and speakers, tested in Monterey

I really haven't the foggiest idea...

...what Apple was thinking here, but if there's a way to conveniently control whether or not ones mic is muted without having to open the Sound panel or install a 3rd party app, I'll be honest: I'VE yet to find it.

If you're not part of the solution...

...you're part of the precipitate. And while whatever activities YOU decide to precipitate in is your own business, and totally none of mine, I'd just as soon not listen to them across the next bridge you're on, either.

Usage/Syntax

The code below, when added to your ~/.bash_profile will add two new commands to your shell (well, three, strictly speaking, but the demographic about to get all up in a symantic snit about same likely isn't looking at this Gist).

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vol <optional_value>

Once installed, running vol will toggle the mute function on your Mac's speakers on or off, and running vol <Percnt_Val> (e.g. vol 25) will set the speakers' volume to that precise value.

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mic <optional_value>

The mic command can be used exactly the same way (mic to toggle, mic <New_Value> to specify the threshold).

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Okay, so why CLI?

Because just about everything (Karabiner, Keyboard Maestro, Shortcuts, Automator, IFTTT, etc) can trigger a shell script. I included JUST the toggle portion in AppleScript, below, as well, if you're desperate to get the functionality from the Settings Panel natively, too.

License: Sausages and Law

By installing, implementing, using, distributing, reading, modifying, executing, and/or being aware of this code's existence, you agree to vote in the forthcoming US Presidential election in 2024, presupposing you are inside the USA, of legal age, and eligible to do so (if you DON'T meet these criteria, you're off the hook; treat it as MPL2 and go to town).

audiovol.sh

function vol(){ audiovol 'output' $1; }
function mic(){ audiovol 'input' $1; }
function audiovol(){
    AUDIO_IO=$1
    NEW_VOLUME=$2
    [[ "$AUDIO_IO" == "" ]] && AUDIO_IO='input'
    [[ "$AUDIO_IO" == "input" ]] && DEVICE_TEXT='Microphone' || DEVICE_TEXT='Speakers'

    if [[ "$NEW_VOLUME" == "" ]]; then [ "$(osascript -e "$AUDIO_IO volume of (get volume settings)")" -gt 0 ] && NEW_VOLUME=0 || NEW_VOLUME=100; fi
    [ $NEW_VOLUME -gt 0 ] && MUTE_TEXT='Unmuted' || MUTE_TEXT='Muted'

    osascript -e "set volume $AUDIO_IO volume $NEW_VOLUME" &&
      export MIC_VOLUME="$NEW_VOLUME" &&
      echo "New $DEVICE_TEXT audio $AUDIO_IO level: $MIC_VOLUME." &&
      echo "$(osascript -e "display notification \"New audio $AUDIO_IO level: $MIC_VOLUME. \" with title \"$DEVICE_TEXT $MUTE_TEXT\"")"
}

toggleMic.workflow

on getMicrophoneVolume()
	input volume of (get volume settings)
end getMicrophoneVolume

if getMicrophoneVolume() is greater than 0 then
	set volume input volume 0
	display notification "Audio Level set to 0!" with title "Microphone muted!"
else
	set volume input volume 100
	display notification "Audio Level set to 100!" with title "Microphone unmuted!"
end if

Nice!