What mixr does
mixr gives every app on your Mac its own volume — and quietly handles the audio headaches macOS leaves you to deal with yourself.
It lives in your menu bar. There’s no account, no setup wizard to fight, and nothing leaves your Mac.
The core idea
macOS gives you one volume for everything. mixr gives you one per app.
Turn your music down without touching your call. Boost a too-quiet video past 100% without blasting everything else. Set an app’s level once and mixr remembers it.
What else it handles
Beyond per-app volume, mixr manages the parts of Mac audio that usually require digging through System Settings:
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Your microphone stays put. mixr keeps your mic on the device you prefer instead of letting macOS switch it to whatever plugged in last. See: Why does my mic keep switching?
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Ducking for calls. When your mic goes live, mixr lowers your other audio so you can hear the call, then restores everything when you’re done.
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A one-press mic kill switch. Mute your mic instantly with a hotkey — with an honest note when a device can’t be software-muted.
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A setup that understands your hardware. The Setup Advisor reads your actual devices and tells you what it sees — including the gotchas, like an interface that can’t be muted or AirPods that’ll drop to call quality.
What makes it different
mixr is honest about your hardware. It tells you what it can do, what it can’t, and what to do about the difference — rather than faking controls that don’t really work.
And it’s quiet: no drivers, no virtual audio devices, almost no CPU. Quit mixr and every app returns to normal. It doesn’t send anything anywhere — no account, no analytics, no telemetry.
Getting started
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