"MPE support" appears on more product pages every month, but the phrase covers a lot of ground. Some instruments treat every note as an independent voice. Others accept MPE data but only use part of it. Recent releases show how much the details vary, so here are five questions worth asking before you buy a controller, plugin or DAW.

1. Which dimensions of expression does it use?

MPE sends each note on its own MIDI channel, which lets every note carry its own pitch bend, pressure and timbre. Boris FX's MPE guide lists five dimensions: strike velocity, pressure after the initial hit, glide (left and right pitch bend), slide (front to back, often mapped to timbre) and lift on release. A product that responds to only glide and pressure is not wrong, but you should know that before you buy. Look for documentation that names pressure, slide and pitch bend specifically.

2. Is MPE on by default?

Many instruments need a switch. Ultra's 1.1 update adds full MPE support, but you enable it in the plugin settings. Fred's Lab's Töörö mkII runs four-part multitimbral by default and switches to MPE mode on request. If an instrument seems to ignore your controller, a hidden mode setting is the first thing to check.

3. What happens without an MPE controller?

A good instrument degrades gracefully. Tupos MPE Subtractive is a useful example: with an MPE controller each note gets its own pitch bend, pressure and slide, while a standard keyboard with aftertouch applies pressure to the whole voice. That means the instrument stays playable on gear you already own. Ask whether the plugin offers a fallback, and whether you can still use it in a track where only a mod wheel is available.

4. Can you set zones and channel handling?

Zone settings decide which MIDI channels are treated as MPE. Tupos offers Lower, Upper and Both, and also supports multi-channel mode. Töörö mkII's MPE mode supports lower and upper zones, giving two simultaneous patches. If you plan to split a keyboard or layer two sounds, confirm that zones are configurable. Controller profiles help too: Tupos includes presets for ROLI, LinnStrument and MIDI guitar.

5. How does your DAW handle it, including plugin formats?

The DAW matters as much as the instrument. The Boris FX guide says Ableton Live has supported MPE since Live 11 and continues in Live 12, Logic Pro handles it through MIDI Mono Mode, Bitwig builds it into its engine with a detail editor for MPE data, and Reaper and Samplitude also support it. Plugin format can matter as well. During the Bitwig Studio 6 beta, one user on KVR reported that the MPE toggle for instruments was still present for VST3 but not for CLAP. That was a single forum report on a beta, so treat it as a prompt to test your own format rather than a confirmed limitation.

Bonus: look at update history

Compatibility changes over time. In 2025, Synapse Audio's Dune 3 update 3.64 expanded MPE support to more controllers, and Expressive E released a library of more than 300 MPE-ready presets for it. A developer who keeps refining MPE handling is a better bet than one who added a checkbox and moved on.

A quick test routine

Once you have the product, spend five minutes on a simple test. Hold a chord, then slide one finger and press harder on another. If only one note changes, per-note expression is working. If every note moves together, check your zone settings and the instrument's MPE mode before assuming the hardware or software is at fault. Most problems come down to a mode, zone or channel setting, and all of them are fixable in a minute once you know where to look.