Send CC using your controller's aftertouch signal.
Map it to any knob or slider to use aftertouch even if your MIDI controller doesn't support it!
The Gain knob can increase or decrease your controller's aftertouch signal without reprogramming your MIDI controller.
Use it as a finger strength trainer: see if you can press hard enough for the level indicator to hit the peak!
Minimum requirements: Ableton Live 9.7.7 and Max for Live 7.3.5