"Duck track" (track 1):1) choose SEND/bus1 2) select, for example, Focusrite d33) select from "side chain input" : bus 14) Click on the "key" input selector (only appears on certain plug-ins that feature side-chain processing)5) Modify pots on d3 plug-in to achieve desired effect.Source track (track 2):1) choose bus 1 (for example)2) set bus 1 to unity / 0db