Expressive MIDI Synthesizer

A Blast from the Past

VOLT is designed to deliver classic synth sounds from the late 70s and early 80s but it goes much further than that.
Complete with multidimensional polyphonic expression (MPE), AUv3 support, built in effects, 100+ hand crafted factory presets and more, VOLT is a joy to play.

VA Synth Voice

At it's core, VOLT is comprised of up to 8 virtual analog synth voices each including one multi wave oscillator, SEM style filter, LFO, AMP, Distortion & 2 ADSR Envelopes.


Being is centered around expressive playing, VOLT comes with a builtin 2D touch keyboard, full MPE support and more.

Built-in Effects

To top things off, VOLT comes with a number of high quality stereo effects including Chorus, Delay and Reverb.


VOLT supports all the standards you might expect to find in a modern iOS Music Application.


AudioUnit Extension

VOLT is built as a Audio Unit Extension, use it like a plug-in in your DAW.


Inter-App Audio

With Inter-App Audio you can use VOLT when recording into other apps such as Garageband.



Use VOLT with AudioBus to further route or process sounds in other apps.



Of course, VOLT comes with a solid standalone app as well.

MPE | Expressive MIDI

Express yourself - with VOLT and MIDI Polyphonic Expression


VOLT was built with MIDI Polyphonic Expression (MPE) in mind, a extension to the MIDI standard which is now part of the official MIDI specification.

Expressive Touch

VOLT doesn't require any additional hardware as it comes with it's own expressive onscreen keyboard capable of slide and glide.


With full support note velocity, channel and polyphonic aftertouch, VOLT plays just as fine with any traditional keyboard.


VOLT comes with a number of high quality stereo effects


Widen up your sound, create lush pads or intense leads with the built-in DimensionD style stereo chorus


The most essential - Digital Stereo Delay to add that little something. Ranges from 0.1 to 500ms in free mode or 1/1 to 1/32th when tempo synced.


Because everything sounds better with reverb, VOLT packs a lovely vintage style algorithmic reverb capable of almost infinite decay.


Synth Voice

  • Variable Waveshape
  • Flexible Sub, Noise
  • SEM Style SVF Filter
  • LFO per Voice
  • Dual ADSR
  • Poly Drive (Dist per Voice)
  • 8x Polyphony / Unison
  • Detune / Slop
  • Pan Spread
  • Arpeggiator

Input / Expression

  • Regular Touch Keyboard
  • Expressive Touch Keyboard
  • ROLI Seaboard
  • ROLI Lightpad Block
  • MIDI Keyboard
  • MPE Controllers


  • Factory Bank incl 100+
  • All hand crafted and fine tuned
  • Shared between Standalone and AU
  • Templates & Categories
  • Unlimited User Presets
  • Preset Export


  • Standalone
  • Audio Unit v3 Extension
  • Audiobus Instrument
  • Inter-App Audio Instrument
  • Ableton LINK


Check out this sounds samples - recorded straight from VOLT, no external effects used


from the Apple App Store


v1.1 (129) for Apple iPad