The MPE protocol can be tough to wrap your head around, so let’s look at it in pieces: MPE uses MIDI data as its core language, but completely changes its approach to sending that data. MPE stands for MIDI Polyphonic Expression, but has also been referred to as Multidimensional Polyphonic Expression. In this article, we’ll cover the potential that MIDI Polyphonic Expression brings to creative expression and some examples of MPE-enabled controllers. A rapidly growing number of manufacturers, developers, and users are leveraging the possibilities that MPE unlocks, so let’s learn what all the hype is about. Continuing this conversation, we’re going to look at MPE data and the technology surrounding it. Recently, we took a deep-dive into what MIDI data is and how it works.