Controller

If you have spent any time around electronic music in the last decade, you have probably seen the letters MPE written on the side of a controller and not thought too much about them. The acronym sounds like a feature bullet. It is not. It is a quiet but fundamental reframing of what an electronic instrument can do, and once you have spent serious time playing one, going back to a fixed-velocity keyboard feels like trading a touch screen for a number pad. ...

About MIDI Polyphonic Expression (MPE) is an extension of MIDI that gives every note its own continuous control over pitch, pressure, and timbre. Where standard MIDI shares pitch bend and aftertouch across the whole channel, MPE spreads notes across multiple channels so each voice in a chord can be bent, swelled, or shaped independently. In practice this means you can hold a chord and bend a single note up, slide between voicings without re-triggering, add vibrato to the top line of a phrase while the rest sustains cleanly, and play electronic instruments with the kind of per-note nuance that string and wind players have always taken for granted. ...