Multidimensional Polyphonic Expression (MPE) MIDI is a proposed new standard for how multidimensional musical controllers like the Continuum Fingerboard, the LinnStrument, and the Roli Seaboard Rise interoperate with synthesizers, sound modules, and music software. It is not a big addition to MIDI, rather it is a clever re-purposing of something MIDI has always be able to do.
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