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MIDI specifications for Multidimensional Polyphonic Expression (MPE)

Since Winter NAMM 2015, I’ve been working on a new MIDI specification together with many other industry professionals (Apple, Bigwig, Haken Audio, KMI, Madrona Labs, Moog Music, Roger Linn Design, ROLI, …). We’ve preliminarily called it Multidimensional Polyphonic Expression, in short: MPE.

The point is very simple: to allow new controllers like the LinnStrument and Eigenharp to have full per-note expressive support in sound generators and DAWs.

We’ve taken a pragmatic approach where we kept the best of what is already in practical use today and structured in so that adding support for MPE would be the least possible effort, while providing the most possible benefit.

A beta version of the spec is available at

Feel free to reach out to let us know what you think of it!

Posted in Controllers, Synth.

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Continuing the Discussion

  1. Bitwig Studio 1.2 Beta Available | Factotumo linked to this post on September 7, 2015

    […] support for the Linnstrument and Roli Seaboard controllers.  This requires Bitwig to support Multidimensional Polyphonic Expression, a new, backwards-compatible version of the MIDI spec designed to enable a higher degree of […]

  2. The ‘Expressive MIDI’ Proposal and Animoog | Animoog love linked to this post on November 17, 2015

    […] version by the end of 2015. Links to the Expressive MIDI specification was publicly shared at least last April. To access it yourself, follow this link to Google Docs. Revision 1.25 is only three weeks […]

  3. Getting started with Axoloti | TIC TIC linked to this post on December 30, 2015

    […] and EigenD developer had gotten involved in Axoloti. One of his many contributions was adding MPE support, making Axoloti a convenient sound source for the Eigenharp and the other PMCs. As I […]

  4. Are Musicians Obsolete? – Musical Alternatives linked to this post on July 20, 2016

    […] I am using this opportunity to spend more time with Logic Pro X which has the added benefit of MPE support for instruments like […]

  5. The Future of MIDI… | darinmarshall linked to this post on July 22, 2016

    […] posted this article about the Future of MIDI, including Multidimensional Polyphonic Expression or MPE: A term that applies to a new class of controllers called PMCs (Polyphonic Multidimensional […]

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