 MPE works by assigning each note to its own MIDI channel so that particular messages can be applied to each note individually.The specifications were released in November 2017 by AMEI and in January 2018 by the MMA.Instruments like the Continuum Fingerboard, Linnstrument, ROLI Seaboard, and Eigenharp let users control pitch, timbre, and other nuances for individual notes within chords.