---NOW IN NEW .ZPAK FORMAT WHICH ALLOWS AUTO-INSTALLATION STRAIGHT FROM YOUR DEVICE, NO MORE NEED FOR A COMPUTER WITH ITUNES TO INSTALL---
This videopak let's you perform sidechain ducking on the OP-Z.
Demo video: https://www.youtube.com/watch?v=dPUYf4jWtKM
Channels 1-8 and 16 can be selected as the sidechain channel, this is done by pressing the "white keys" buttons on channel 16 the OP-Z. The first 8 from left to right for channels 1-8, and the last one for channel 16.
Channels 1-8 can be selected as the channel you want to duck, this is done with the "black keys"/number buttons.
(If you chose to use channel 16 as the sidechain channel you shouldn't use any of the keys that change ducking/sidechain channel on the sequencer of course)
You also have control over the ducking amount, the release time, and the selected ducking channel's volume with the green, blue and red knob on channel 16 (page 1).