Volume keys on every output device, a volume slider for every app, and your browser tabs in the same menu. Shaped like the Control Center sound panel.
Output, input, apps and tabs. One slider each.
The volume keys go to the output device. A device without a volume control of its own (USB headset base stations, HDMI, most DACs) ignores them, so the keys do nothing.
Per-app volume has no hook at all: macOS mixes every app straight into the device. The usual workaround is a virtual audio device in front of the real one, which takes the system output away from macOS and breaks AirPods switching, AirPlay and echo cancellation.
No boost, no EQ, no balance, no sample rates. Just the missing parts.
Core Audio can tap an app's audio before it reaches the device (macOS 14.4+). Faded is built on that.
A browser is one audio client to macOS, so tabs can only be separated inside the browser. The extension scales what each page plays.
Chrome Web Store listing coming. Until then, load it unpacked from GitHub.
git clone https://github.com/pillgat3s/faded && cd faded && make installbrew install xcodegen.If Faded fixed your volume keys, consider donating.