You can use the mod wheel or any other knob/fader that sends midi to open up the filters in Sunday Keys for Ableton Live. If you've already set up your midi device in Preferences > Midi in Ableton, you can skip right to 2:38 in the video below to see how to set up your mod wheel/fader to the Master Filter in Sunday Keys. It's the #1 most useful mapping you can make for yourself. Start at the beginning of this video if you need to double check that you have your hardware connected properly. You can also find this video and all other tutorials about Sunday Keys for Ableton on the Sunday Keys for Ableton Resource Page under: 6. Setting Up Midi Controller > Connect any knob, fader, or button to Sunday Keys