Why Does My Mac Lower Other Apps' Volume During Calls? (And How to Fix It)
Updated · by the ProMacTools team
What is audio ducking on macOS?
Apps that make calls use Apple's voice-processing audio unit, which provides echo cancellation and noise reduction. While it is running, macOS reduces the volume of other audio on the same output device. The calling app can ask for less ducking, but most apps leave the default, and there is no switch for users in System Settings.
That is why music or a video suddenly gets quieter the moment you join a meeting — or even when you just open an app with an intercom feature, because some apps start voice processing as soon as they launch.
Which apps cause it
- Video calls: FaceTime, Zoom, Microsoft Teams, Google Meet in a browser, Webex, Slack huddles, Discord.
- Camera and doorbell apps with two-way talk, including iPhone/iPad apps running on Apple silicon Macs.
- Voice recorders and dictation that use voice processing.
How to fix it
- Close the call or quit the app when you do not need it — ducking stops immediately.
- Check the app's audio settings. Some call apps have options such as "original sound" or turning off automatic audio processing.
- Take away microphone access in System Settings › Privacy & Security › Microphone if you never use the app's talk feature. Some apps then skip voice processing.
- Boost the other apps. With App Volume Mixer, raise your music or video app above 100% while the call app is open, and mute the call app itself if you only need its picture.
How to tell which app is responsible
Look for the orange microphone indicator in the menu bar and open Control Center: it shows which app is using the microphone. That app is almost always the one triggering the ducking.