FilterSteps is Sequencer which filters incoming audio in time and can add dub-effects. You have to use a Midi-cable to connect Midi-Out to Midi-in of the ModDuoX to control the filter and the delay by the two sequencer. The first sequencer is controlling the filter, the second an audio gain to send certain events to the delay. You can mix the orginal audio with the two effects in the mixer-section.