Despite the fact that NI says that Maschine Mk3 and Plus have automatic detection for sustain/expression, there is no way to get a sustain pedal working on Maschine. I need this so badly. I am a live musician and need to keep my footprint smaller, and need a way to keep notes I'm playing on Maschine sustained while adjusting the master tempo. At this point NI are liars and have been since the launch of Maschine Mk3. the screenshot is from the comparison of features on their website: Insanely enough, the jack can work as sustain in midi controller mode, but not when operating as Maschine.