Now select your Return Track in the Fader View, and add a Reverb Effect before the Fader Unit. Create a New Return and name it accordingly. Inside FMOD Studio, select the Mixer Window via Window -> Mixer Window or press Ctrl+2.
To learn more about audio system Environments in CRYENGINE please have a look in the chapter Audio & Reverbs*. This section describes how to setup Reverbs in levels using FMOD Studio.
