You join a Zoom call. Your music drops to almost nothing. You didn't touch any volume control — something did it for you. This is audio ducking: the automatic lowering of background audio when a call or important audio source is active.
Some people love it. Others hate it — especially when the ducking is too aggressive (music drops to zero instead of a comfortable background level) or when it's triggered unexpectedly.
Here's how to disable unwanted ducking on Mac, and how to replace it with ducking that works the way you want.
Where audio ducking comes from on Mac
macOS itself does not have a built-in audio ducking feature. If your music is getting quieter during calls, one of these is causing it:
1. Zoom's audio processing
Zoom can reduce system audio when it activates. Check Zoom → Settings → Audio and disable "Automatically adjust microphone volume." Also try reducing noise suppression from "High" to "Low."
2. Bluetooth codec switching
When an app activates your Bluetooth headphones' microphone, macOS switches from AAC to the SCO codec. This isn't really "ducking" — it's a codec change that makes everything sound quieter and lower quality. Fix it by using a separate microphone.
3. A third-party app doing it
Some audio apps (like Background Music) have auto-pause or auto-duck features. Some media apps reduce their own volume when they detect another audio source. Check any audio utility apps you have installed.
4. Communication apps adjusting audio
Discord, Teams, and other communication apps have their own audio processing that can affect perceived volume of other apps. Check each app's audio settings for "automatically adjust" options and disable them.
How to stop unwanted ducking
- Check Zoom/Teams/Discord audio settings — disable automatic volume/mic adjustment
- Use a separate mic for calls — prevents Bluetooth codec switching
- Remove audio utilities — Background Music, Soundflower, or any app that might be intercepting audio
- Check macOS Accessibility — System Settings → Accessibility → Audio for any unexpected settings
Replace bad ducking with good ducking
The idea behind audio ducking is actually great — automatically lower background audio during calls so you can hear clearly. The problem is when it's too aggressive (music goes to zero), not configurable (you can't choose how much to lower), or triggered by the wrong thing.
SoundDial has a built-in auto-ducking feature that puts you in control:
- Configurable duck level: Choose exactly how much to lower background audio during calls — from 10% (nearly silent) to 80% (barely reduced). Default is 30%, which keeps music audible but not distracting.
- Smart detection: Detects calls by monitoring microphone usage — the same indicator as macOS's orange dot. Works with Zoom, Teams, FaceTime, Discord, Slack, Google Meet, Webex, Skype.
- Perfect restoration: When the call ends, every app returns to exactly its previous volume. No re-adjusting.
- Easy toggle: Turn auto-ducking on or off in SoundDial's settings. When you don't want it, disable it. When you want it back, enable it.
The difference: instead of some app deciding your music should go to zero during every call, you decide it should go to 25%. Instead of losing control, you gain it. And instead of trying to disable a hidden feature in three different apps, you have one toggle in one place.
Get SoundDial on the Mac App Store — €14.99 one-time purchase, no subscription, macOS 14.2+.