Auto Duck is a professional audio monitoring and ducking utility for macOS. It listens to your microphone or any audio input device and automatically lowers your system volume when sound is detected — then fades it back up when you go quiet.
No more rushing to turn down your music before speaking. No more awkward audio bleed during streams, recordings, or presentations. Auto Duck handles it in real time, automatically.
FEATURES
• Multi-channel level monitoring — see every input channel on its own segmented LED meter, just like a real mixing desk
• Automatic volume ducking — set a threshold and Auto Duck will reduce system volume the moment you start speaking
• Smooth fade in/out — configurable attack and release times for natural-sounding transitions
• Mute mode — fully silence output when above threshold
• Any input device — works with built-in mics, USB audio interfaces, and multi-channel devices
• Real-time level history — glowing phosphor waveform shows recent input activity at a glance
• Non-destructive — Auto Duck only adjusts system output volume; it doesn't touch your audio routing or other apps
PERFECT FOR
Streamers who want music to duck under commentary
Podcasters and content creators
Home studio setups
Presentations and screen recordings
Anyone who wants smart, hands-free audio control
Auto Duck requires microphone access to monitor input levels. No audio is recorded or transmitted — all processing happens locally on your Mac.