The master volume macOS wouldn't give you.

Working volume keys, a HUD, and a real software gain for any audio output — including pro interfaces like the Focusrite Scarlett, where macOS only shows the crossed-out volume HUD.

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Free & open source · macOS 14.4+ · no drivers, no kexts · fails open by design

The real dropdown, rebuilt — drag the volume slider.

It fails open. A crash can never mute you.

Nothing is recorded. No driver, no kext, no admin rights.

F1 F2 work too. Brightness for external monitors.

Scriptable everywhere. loudini from any hotkey tool.

Install

$ git clone https://github.com/pimmesz/Loudini.git && cd Loudini
$ menubar/build-app.sh && open menubar/Loudini.app
# builds the daemon + CLI, bundles them into the app, signs, launches

macOS asks for Accessibility (the volume keys) and System Audio Recording (the engine) on first run — and Input Monitoring only if you want the brightness keys. Headless setups: scripts/install-daemon.sh + scripts/install-cli.sh.

Honest limits

In-app AirPlay is unreachable. The AirPlay button inside Safari or Music streams straight to the speaker — that audio never enters CoreAudio, so no tap-based tool can control it. Select the AirPlay device as your system output instead, and Loudini controls it fully.

Intel Macs get everything except brightness. Keyboards without brightness keys can bind loudini brightness up/down to any shortcut — that path needs no permissions at all.

Your interface already sounds right. Give it volume keys.

Read the full docs