Two of the available effects are filters: Dynamic Filter and Control Filter. I've been able to find a little bit of documentation of these in the Parameter Manual, but it's not clear to me how to use them.
For Dynamic Filter, you can use a Side Chain. Does the Side Chain control the Cutoff of the filter? It seems to me that's what should happen, but it doesn't say that anywhere I've been able to find, so I'd like to check.
For Control Filter, what's supposed to control the filter? I tried the CUTOFF knob, but it didn't seem to do anything. (But possibly I didn't have things set up correctly?)