Auto Duck Not Working

For some strange reason, the Auto Duck feature is not working. I’ve positioned the background music track so that it is the first, top-most track. I’ve also looked at a couple of tutorials on YouTube but still no luck. Thanks.

Tutorials I consulted: and

Specs: MacBook Pro, OSX 10.14.6,
Processor: 2.5 GHz Intel Core i7
Memory: 16 GB 2133 MHz LPDDR3
audacity auto duck.jpg

Is the bottom one your control or voice track? It’s not even close to being loud enough to trigger the ducking action.

Select the bottom track and Effect > Amplify > OK.

That will bring your control track up the loudest it can go without distortion. That may be too loud for the show, that’s up to you. But the ducking action should start working.


Thanks so much!! That fixed it!