Auto Ducking will "duck" audio in one track based on a trigger in another track. It's best used for removing the snare drum from overhead tracks, or for quieting a loud hi-hat track. Auto-ducking can also be used independently of Drumagog. For example, to remove a snare from overhead tracks, you'd run two copies of Drumagog, one on the snare track, and one on the overhead track(s). The Drumagog on the snare track will "remote control" the Drumagog on the overhead tracks(s), and tell it when to notch out, or duck, the snare every time it's heard.