New MPE Synthesizer For iOS, VOLT

This slideshow requires JavaScript.

Numerical Audio has introduced VOLT – a polyphonic synthesizer for iOS, that they say has a special focus on expression.

VOLT at it’s heart is comprised of up to 8 virtual analog synth voices, each including one continuously variable wave oscillator, detunable sub, noise source, SEM style filter, advanced LFO, distortion & 2 ADSR envelopes, followed by a total of 3 master effect units.

VOLT was built with MIDI Polyphonic Expression (MPE) in mind and supports all ROLI products as well as other MPE-compatible devices out of the box. It features a factory bank of more than 100 expressive presets.


  • Polyphonic Virtual Analog Synthesizer
  • Expressive synth engine with MPE, poly-, channel aftertouch & 2D touch keyboard
  • Built-in stereo effects
  • 100+ factory presets
  • Supports ROLI Seaboard controllers 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

Expressive Support:

  • 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


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

Here’s a preview of VOLT in action, via redskylullaby:

Pricing and Availability:

VOLT for iPad is available on the Apple App Store for US $8.99 (through April 3rd, normally $14.99.)

7 thoughts on “New MPE Synthesizer For iOS, VOLT

  1. Been getting some amazing tones out of this. Happy accident- if you tweak the tempo control while playing a patch you get all kinds of cool squelches and squeaks.

Leave a Reply