FabFilter Pro–Q 3. FabFilter Pro–Q 3 is a top-quality EQ plug-in with perfect analog modeling, dynamic EQ, linear phase processing, and a gorgeous interface with unrivalled ease of use. … To upgrade from FabFilter Pro–Q 2, log in to your account.
Add audio files on both the main track and the side chain track. You can simply drag audio files from a Finder/Explorer window onto a track. Select the main track and add Pro–C 2 in the first Insert effect slot. Open FabFilter Pro–C 2’s interface, enable Side chain expert mode and set Side Chain to Ext.