Respiro Shows What MPE Looks Like When Breath, Not Just Touch, Drives the Sound

Most MPE coverage centers on keyboards, grid controllers, and touch surfaces — Osmose, LinnStrument, Seaboard, ROLI's newer Airwave line. But MIDI Polyphonic Expression was never meant to be keyboard-specific, and one of the clearer reminders of that is Respiro, a physical-modeling software synthesizer built specifically for wind and breath controllers that also speaks fluent MPE.

A Synth Built Around Breath, Not Keys

Respiro comes from ImoxPlus, a small developer focused entirely on plugins for wind and breath controllers, and the instrument itself was shaped with input from wind player Pedro Eustache. Instead of sample playback, Respiro uses physical modeling combined with wavetable injection to generate its tones — an approach that suits breath control well, since modeled instruments tend to respond continuously and organically to changing air pressure rather than jumping between static samples at velocity layers.

The plugin ships with 28 different models or algorithms, ranging from woodwind- and flute-like tones to more abstract, "never heard before" textures, each with up to nine macro controls for shaping timbre in real time. That combination — a large bank of physically modeled cores paired with deep macro control — is what makes Respiro interesting to more than just wind-controller specialists: it's a synth engine that rewards continuous, expressive input regardless of what's generating that input.

Where MPE Fits In

Respiro is explicitly designed to work with wind, breath, and MPE controllers, and it's highly responsive to tonguing and breath pressure when used with a wind controller like the Roland Aerophone or similar devices. But because the underlying modulation sources — pressure, timbre shaping, continuous pitch movement — map cleanly onto MPE's per-note pressure and timbre dimensions, Respiro also works as a genuinely expressive option for MPE keyboard and touch-surface players who want a physically modeled voice rather than another wavetable or subtractive patch in their MPE instrument rotation. It's a useful reminder that the MPE spec's real value isn't tied to any specific playing surface — it's a shared vocabulary that breath, touch, and pressure controllers can all speak into the same synth engine.

Pricing and Availability

The desktop version of Respiro runs €165 and is available as a 64-bit AU and VST3 plugin for macOS and Windows. Owners can export their patches to a companion iOS player, which is free to download from the Apple App Store and ships with six instruments out of the box, making it easy to audition the engine's character before committing to the full desktop version. The plugin has been under active development for several years, with the current build sitting at version 1.2.864 for registered users.

Why This Matters for the Broader MPE Ecosystem

Wind and breath controllers occupy a smaller corner of the expressive-controller world than keyboards and touch surfaces, but they were arguably doing "per-note expression" — or in this case, per-breath expression — long before MPE formalized the idea for MIDI. As more DAWs and plugins standardize around MPE as the common expressive-data format, tools like Respiro benefit from the same infrastructure gains as keyboard-focused instruments: better MPE editing in Ableton Live and Bitwig, growing MPE awareness in DAWs like Logic Pro, and a wider pool of MPE-aware effects and utilities that don't care what physically generated the expression data in the first place.

For musicians who came to MPE through a Roli or Expressive E controller, Respiro is worth a look simply as an unusual synth voice. For wind and breath players who've been using MIDI wind controllers for years, it's a sign that the broader software ecosystem is finally speaking their language too — with MPE as the connective layer between two communities that have historically developed somewhat separately.

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