Using the side chain

FabFilter Twin 2 includes a side chain input. You can use this to let envelope generators or envelope followers trigger on an external audio signal. In fact, this is the only way to use an envelope follower. Connecting a side chain signal to a synthesizer plug-in can be challenging in some hosts. Here are tips per host on how to do this:

• Cubase
  You cannot use the side chain input of a VST 2 instrument plug-in. Cubase also doesn't support side chains for VST 3 instrument plug-ins at the time of writing, but as a workaround, we have defined the VST 3 plug-in as an "FX Instrument" which allows you to use it both as an instrument and as an effect. So, you can drop the VST 3 version of FabFilter Twin 2 as an insert on the side chain track, and then route MIDI data through it from a separate MIDI track.
  
• Logic
  In Logic's plug-in header side-chain menu, select the track or bus that you want to use as a side-chain signal.
• Pro Tools
  Click on the key input button above the plug-in interface and select any bus to retrieve side chain data from. Like all side chains in Pro Tools, it is mono only.
• Ableton Live
  In the track you want to use as the side chain, locate the Audio To setting and simply select the desired FabFilter Twin 2 instance. This works starting with Live 6.
• Tracktion
  Create a rack and put FabFilter Twin 2 in it. You can then use the rack two times in different tracks, one to route MIDI to it, one to route the side chain to it.
• Digital Performer
  Side chain option appears in interface, but does not work with instrument plug-ins in version 6.02. This should be fixed in later updates.
• Sonar
  Does not support routing side chain data to VST instrument plug-ins (version 7).

Use the Audition button in the bottom bar (with the headphones icon) to listen to the side chain signal to confirm that everything is set up correctly.

Next: MIDI CC table

See Also
Quick start
Support