Hybrid wavetable synths don't always get the MPE treatment right away, so it's worth flagging when one catches up in a meaningful way. Tone2 has released Icarus 3.1, a free update for existing Icarus 3 owners that extends the synth's MPE support into Legato and Mono modes — a detail that matters more than it might sound.

Why Legato and Mono Mode MPE Matters

Most MPE implementations focus on polyphonic playing: each finger gets its own MIDI channel, and pitch bend, pressure, and timbre data travel independently per note. That works well for chords and layered textures, but it leaves out a common performance technique — monophonic lead lines played with legato phrasing, where expressive controllers are often at their most useful. A player sliding between notes on an Expressive E Osmose or a Haken Continuum wants that same per-note pitch and pressure data to carry through even when the synth voice itself is set to mono or legato behavior.

With 3.1, Icarus now reads MPE data correctly in those modes, so glides, pressure swells, and slide/timbre changes translate properly into a single sustained voice instead of getting flattened or ignored. For sound designers using MPE controllers to play solo synth or lead patches — think expressive brass, woodwind emulations, or vocal-style leads — this closes a gap that made mono patches feel noticeably less responsive than poly ones on the same hardware.

What Else Is in the Update

The 3.1 release isn't a single-feature update. Alongside the MPE work, Tone2 added:

Custom skin support, including a new default skin designed to make Icarus's signal path easier to read at a glance — useful for anyone patching complex multi-layer sounds where the previous interface could get visually dense.

Wavetable editor improvements, including the editor now remembering the last file location used, which removes a small but persistent friction point for anyone building custom wavetables regularly.

Pitchwheel behavior refinements, tightening up how pitch data is interpreted — a change that pairs naturally with the MPE work, since accurate pitch handling is foundational to expressive per-note control.

Bug fixes, including a workaround for a Windows 11 issue affecting the vertical layout of the Segoe UI font in the plugin interface, and a fix for a rare compatibility issue with trackpads on Mac.

Tone2 notes the update is fully downward compatible — existing songs and patches load without any conversion steps, so producers with established Icarus projects can update without worrying about broken presets.

Getting the Update

Icarus 3.1 is a free update for anyone who already owns Icarus 3, available now through Tone2's update page. For those unfamiliar with the synth, Icarus is Tone2's hybrid wavetable engine combining subtractive, FM, and additive synthesis approaches in a single instrument, and it's one of a growing number of established synth plugins retrofitting proper MPE handling rather than launching with it from day one.

The Bigger Pattern

Icarus 3.1 fits a trend worth watching: MPE support is increasingly showing up as a point update to existing plugins rather than a headline feature reserved for new releases. U-he Zebra 3, Native Instruments' sampler line, and now Tone2's wavetable engine have all shipped MPE improvements as free maintenance updates in 2026 rather than charging for the capability separately. For musicians building a rig around an MPE controller, that steadily shrinks the list of "great synth, shame it doesn't support my keyboard" situations — and mono/legato handling specifically closes one of the more common complaints from players who use MPE gear for solo lines as often as chords.

Full release notes and the download are available on Tone2's Icarus update page.