MPE is where individual notes can have their own expression data, allowing you to use pressure and other playing techniques to affect notes separately. In our first look at version 5 of Studio One I’m going to spend some time looking at using MIDI Polyphonic Expression, or MPE. We offer guidance on working with MIDI Polyphonic Expression (MPE) in v5 of Studio One. Screen 1: Setting up the ROLI Seaboard Block as an MPE controller.