Zoom is deafening.
Or inaudible.

Zoom volume problems come in two shapes and they have opposite causes. Either the call is punishing and everything else on the Mac is fine, or the caller is a whisper and turning the Mac up makes every notification a physical event.

Both are fixable, and in both cases the mistake is reaching for the system volume key first.

1. Zoom's own speaker level

Zoom → Settings → Audio has a Speaker section with its own level and a Test Speaker button. This is separate from the macOS volume and it is where call volume should be set.

The calibration worth doing once:

1. Put your system volume at roughly two-thirds and leave it.
2. Press Test Speaker and set Zoom's own level until it is comfortable.
3. On your next real call, adjust Zoom's slider, not the system one.

Now "the call is quiet" has somewhere to be fixed that does not drag your music, your notifications and your video along with it.

2. Confirm the device

Zoom keeps its own speaker and microphone selection, and it does not always follow macOS. If you plug in headphones mid-call and nothing changes, or audio is coming out of a monitor you forgot had speakers, this is why. Set both explicitly in Settings → Audio rather than relying on "Same as System".

While you are there: Automatically adjust microphone volume affects what other people hear from you, not what you hear. If your own level swings around on calls, turn it off and set input by hand.

3. If the alerts are the real problem

A lot of "Zoom is too quiet" is actually "everything else is too loud, so I cannot raise the system volume." Two free fixes:

• System Settings → Sound → Alert volume is a separate slider from your output. Pull it down to a third. Nothing else changes.
• A Meetings Focus stops notification banners and their sounds. It can be set to turn on automatically when you share your screen.

The whole ordered list of these lives in the remote-work audio checklist.

4. When Zoom is set correctly and still wrong

The remaining case is the one settings cannot reach: Zoom at its best level and Spotify at its best level are different absolute levels, and macOS has one volume for both.

The general fix: give Zoom its own fader

Everything above is Zoom fixing Zoom. The reason you keep running into this is more basic: macOS has exactly one volume, and it moves everything at once. Windows has had a per-application volume mixer since 2007. macOS never shipped one, and it is not an oversight Apple is quietly working on — it is a consequence of how Core Audio was built.

What changed is that in 2024 Apple shipped Core Audio process taps as a public API, which lets a signed app capture and adjust the audio of one specific process in user space. No virtual audio driver, no kernel extension, no restart, and no swapping your default output device for a fake one. That is what MixPill is built on, and it is why the setup is a single macOS permission rather than an installer and a reboot. The longer version is in why macOS has no volume mixer.

In practice: every app currently making sound gets a row with a fader, a mute, a solo and a live dBFS meter. Set Zoom to 40% and leave everything else alone. The level belongs to Zoom and persists, so you set it once. Unity sits at 80% of the fader travel with up to +6 dB above it, so an app that is too quiet can be pushed up rather than only down — which is half the reason people go looking for a mixer in the first place.

All of that is free, for unlimited apps, permanently — no trial clock and no nag screens. Pro adds per-app EQ and a noise gate, per-app output routing, presets, and Auto-Ducking that drops everything else to 20% whenever a call takes hold of an audio input.

Two things a per-app mixer does specifically for calls

• Push a quiet call above unity. Zoom's own slider stops at its maximum. A fader with gain above unity does not — up to +6 dB in MixPill's case — so a genuinely quiet caller can be raised without touching your system volume. Watch the meter rather than guessing: it is a true dBFS scale with a −12 dB reference tick and a held clip indicator, so you can see when you have pushed it too far.
• Make a thin voice intelligible. A 5-band EQ on the Zoom channel alone — a little presence, less low-end rumble — does more for a hard- to-follow caller than volume does, and it leaves music and system sounds untouched. There is a live version of the curve on the home page.

And if you want the reverse — everything else getting out of Zoom's way automatically the moment a call starts — that is Auto-Ducking.

Common questions