System audio
Set, nudge or mute the volume of the speakers or the microphone, fixed or from a fader.
- Where
- + Add actionMediaSystem audio

System audio changes the volume of your computer’s default speakers or microphone, or mutes them. The level can be fixed or come from a variable, so a fader on the Launchpad becomes a master volume control.
Settings
Section titled “Settings”| Setting | What it does |
|---|---|
| Device | Speakers: the system’s default output device. Microphone: the system’s default input device. To change which device is the default, use Switch audio device. |
| Do | Set the volume to a level, Change the volume by a step, Mute, Unmute or Toggle mute. |
| Volume | For Set the volume: the level, 0 to 100 %. |
| Step | For Change the volume by: −50 to +50 %. Negative steps turn it down. The result never goes below 0 or above 100 %. |
| From variable | A variable whose number replaces the slider, for example value in a fader’s actions or fader.volume anywhere. If the variable does not hold a number, the slider value is used. |
How it runs
Section titled “How it runs”- The action has no Wait switch. The next action starts once the system has applied the change.
- If the system refuses the change, the reason goes to the log and the macro goes on.
Example
Section titled “Example”A master volume on the Launchpad:
- Right-click a pad and choose New fader here…, range 0 to 100, unit
%. - On the fader’s Actions tab, under When the level changes, add System audio: Speakers, Set the volume, From variable
value.
Two more buttons with Change the volume by −5 and +5 make fine steps.
Related
Section titled “Related”- Faders — pads as a volume slider
- Switch audio device — pick which device is the default
- OBS & Streamlabs: set audio — the volume of one source in your streaming app