Music playing. A video open in the browser. A call about to start. You want to turn one app down without turning everything else down with it. I built AppMixer , a Mac menu bar app that gives each app its own volume and output controls. The everyday controls are free. Pro adds audio processing and automation through a one-time purchase , with a 14-day free trial. No subscription, no account, and no tracking. Get AppMixer on the Mac App Store Turn down the browser, keep t...