This Plugin will automatically lower the volume (currently fixed at -10dB) of the music played by Foobar2000 using the WinAmp Foobar2000 Plugin.
Right now it is not possible to change the ducking volume. It is set to -10dB. I'm looking forward to changing that.
There are several commands though, that you can use to toggle/disable and enable the plugin without enabling or disabling it in the options menu:
/musicducking onofftoggles the plugin on and off.
/musicducking onenables the plugin.
/musicducking offdisables the plugin.