Ducker 1.5

“Ducking is an audio effect commonly used in radio and pop music, especially dance music.”
~ Wikipedia
Ducker turns your Mac into a phenomenal minimalistic DJ machine.

With just one button and a slider, it could not be easier to learn.
While you hold Shift, your machine is partially muted so you can have a quick chat, do a smooth voice over, or pick up a phone without turning off your music entirely. It’s also fun to just play around with.
Features:
• Duck by holding Shift or clicking the button.
• Adjustable ducking volume.
• Support for retina screens.