Menu bar app · macOS 14 Sonoma
macOS audio is full of sharp edges, volumes that blast on wake, mics that switch mid-call, mute states that reset when you plug in headphones. Resonance fixes all of that in a single, native menu bar app.
One-time purchase · $6.99 · No subscriptions · No analytics
Why Resonance exists
Real scenarios. Precise fixes. Nothing hypothetical.
The problem
macOS remembers your last volume level , even if it was 85% for a movie last night. Open your laptop in a quiet office, a meeting room, or at 2 a.m., and everyone suffers.
Volume Guard mutes output before every shutdown and wake event. You choose: stay silent, restore the last level, or wake at a fixed percentage. The same Output tab also handles the Speaker Safety Net, built-in speakers mute automatically whenever headphones or an external interface are active, and restore when you disconnect them.
The problem
macOS auto-routes audio to the newest device. Plug in AirPods during a Zoom or Teams call and everyone suddenly hears you through a worse mic, or silence, while you scramble to reconfigure.
Device Lock pins your preferred input and output independently. No matter what you connect or disconnect, your call stays on the device you chose.
The problem
Zoom, Teams, Meet, OBS , each has its own mute control buried in its own UI. When someone interrupts you IRL, you spend precious seconds hunting for the right window while your audience waits.
Global mute cuts your mic at the OS level regardless of what app has focus , one shortcut silences every app simultaneously. Need the reverse? Hold the push-to-talk key to unmute, release to mute.
The problem
macOS resets the mute state on every device change. You mute yourself in a noisy café or open-plan office, connect headphones , and your mic silently springs back to life without a single warning.
Mute persistence monitors every device transition and re-applies your mute state within 500 ms. If you were muted before the device change, you stay muted , no exceptions.
The problem
Input device, output device, volume , buried across separate tabs in System Settings. You want to know if your mic is live and switch your speaker in two seconds, not thirty.
The menu bar icon turns red when your mic is live , visible from any app, at all times. One click opens the panel: switch your output device, check your input, trigger a mute. No System Settings, no tabs, no waiting. And if you want a more personal cue, the live-state color is fully customizable , pick any color for the icon, background, or both.
The problem
Unplug your USB audio interface, plug it back in , macOS routes audio back to built-in speakers without warning. Your studio-quality mic and monitors sit unused while you manually reconfigure, every single time.
Preferred devices automatically re-select your chosen mic and speakers the moment they connect, with graceful fallback when they don't. Set it once, never think about it again.
Full feature list
Eight behaviour groups. Each one specified, tested, and running in a single lightweight process, no background daemons, no surprises.
Resonance sits quietly in your menu bar, ~10 MB of native Swift talking directly to CoreAudio. No Electron, no subscription, no tracking. Set it up in two minutes and forget about it.
One-time purchase · No subscription · No analytics
