VOLT is a virtual analog synthesizer designed to create classic synth sounds while emphasising expressive play.

With full support for multidimensional polyphonic expression (MPE) - VOLT is a great companion to any Seaboard player.

* Polyphonic Virtual Analog Synthesizer
* Expressive synth engine with MPE, poly-, channel aftertouch & 4D touch keyboard
* Built-in stereo effects
* 100+ fine tuned factory presets
* Supports ROLI Seaboard, LinnStrument, Geoshred and others out of the box
* Standalone operation with support for USB audio interfaces, wired, network & bluetooth MIDI
* Audio Unit v3 Extension
* Inter App Audio support
* Audiobus support
* Ableton Link

Synth Voice:
* Variable waveshape
* Variable pulse-width (on all waves)
* Detunable sub & noise source
* SEM style state-variable filter
* LFO per voice
* Dual ADSR
* Poly drive (per voice distortion)
* 8x Polyphony / Unison
* Detune / Slop
* Pan Spread
* Arpeggiator

* 3x stereo effect units
* Vintage Chorus
* Digital Delay (syncable)
* Epic Reverb

* MPE MIDI hardware including but not limited to ROLI Seaboard Rise, Seaboard Block, Lightpad Block
* MPE MIDI software including but not limited to Geoshred, Geoshred Control
* Regular MIDI keyboards featuring channel or poly aftertouch, pitch- and mod wheels
* Onscreen 2D Touch Keyboard (supports slide and glide)
* Plain MIDI Input

* Factory bank including 100+ expressive presets ready to play out of the box
* Preset Management with Templates & Categories
* Shared User Presets between Standalone and AUv3 versions
* Preset Export

* Standalone
* AUv3 Instrument
* Inter-App Audio Instrument
* Audiobus Instrument

What’s New

Version 1.3.3

- Added support for MIDI Program Change Messages
- Added support for sustain/hold pedals
- Added support for expression pedal (maps to mod wheel)
- Added option to toggle manual scrolling of the main UI (see settings screen)
- Added option to select whether MIDI program changes apply to all presets or just favourites
- Fixed an issue where MIDI routing via Audiobus/IAA would not work in some cases
- Fixed an issue where some settings would not be be initialized properly when first installing the app
- Fixed an issue where loading the AU on iPhone would load the wrong orientation in some cases
- Fixed an issue where using traditional MIDI input could cause hanging notes in some rare cases
- Fixed an issue where playing the same note twice using the string layout (or using geoshred) would cause the wrong key to be released upon receiving a note off message
- Minor UI tweaks

Ratings and Reviews

4.6 out of 5
70 Ratings
70 Ratings
Motor D ,

Really awesome but having issues

This is a really beautiful synth app in terms of both sound quality and its interface. However the latest version is creating some audio problems on my iPad (6th gen). With some of the presets, as soon as a touch a key, the VU meter goes full blast (into the red), and I hear zero audio. When I remove my fingers from the keys, the volume is still maxed out in the red almost as if it’s stuck in some sort of feedback loop... but still no audio at all. What’s more interesting is that if I switch to any other app while Volt is in this state, I can’t get audio from those apps either. So it seems like Volt is causing some kind of system-wide audio problem. I’d love to be able to use Volt in a live performance situation because it sounds fantastic when it works. However, this problem makes that impossible.

Eriptron ,

Very smart design❣️

Increased my rating by 1 star to counter zodthemagnificent’s (lol) unfair rating.

Thank you. And, naturally, I hit the ‘+’ for incrementing the playing preset and lost my settings again. Anyway, the far right ‘+’. :-) The fonts could be larger in the preset display screens and the orange selection highlight bar makes reading what’s highlighted hard.
Tried saving my preset and Volt crashed, losing everything. 😡Not sure why three UI button views as FX is displayed with Main on my 12.9” iPad Pro. I can’t save any presets! Volt keeps crashing when I do. Having the digital readout for the controls under the control, your finger covers the value. Any latched key/s graphic disappears when you move the octave slider to another octave and back. You can’t tell what note/s are latched. Shelving Volt until the preset saving issue is fixed.
I saw a pre-release video so it was just a matter of having patience waiting to get it. lol This is going to be fun. The thick, toothy rolling layered sound I can get out of Volt is pretty crazy❣️

Developer Response ,

Hey Erpitron,
I'm afraid that's a rather embarrassing bug as this non working/app crashing save button is a left over from an older version of the preset manager which should have been removed completely. So instead of using the "Save" button you would save a preset by tapping the "+" button located on the upper right.
I realize that's not obvious at all and apologise for any frustration this may have caused. The good news however is that the issue is fixed in the upcoming update which has been submitted already and should be available shortly.

richardbates1 ,

Great synth

This synth is fantastic. Beautiful GUI, great sound. I have an over all questions that applies to so many iPad apps, why is there black borders around the software app? I have the new iPad Pro with the great screen that goes practically all the way to the edge yet then your app and many others don’t take advantage of that extra screen space? There is a black border around the app’s GUI.... Why is that?


Kai Aras
45.5 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2017 Kai Aras


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like