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VOLT Synth

VOLT Synth

MIDI Expressive Synthesizer

193 ratings
62 reviews
#196 in paid Music
🎵 Music
$19.99 $7.99
In-App Purchases

Lowest price: $4.99 3 years ago (-60%)

↓

Price history

Details

  • Released
  • Updated
  • March 29, 2018
  • October 27, 2020

Features

Developer

Kai Aras
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VOLT Synth screenshot #1 for iPhone
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About

This app is a virtual analog synthesizer designed for expressive sound creation. It supports multidimensional polyphonic expression (MPE) and offers a variety of synth voice features, built-in effects, and keyboard layouts. It's compatible with MPE hardware and software, as well as standard MIDI controllers.

✓Virtual analog synthesizer
✓Multidimensional Polyphonic Expression (MPE)
✓Expressive synth engine
✓Multiple keyboard layouts
✓Built-in stereo effects
✓100+ factory presets
✓Standalone and AUv3 support
Show original description

What users say

Summarized from real user reviews of VOLT Synth. Based on 193 reviews and a 4.6/5 average, it highlights the 8 positives and 9 negatives reviewers mention most about this Music app.

Positive things

  • 🎶Great sounds
  • ✨Intuitive UI
  • MPEintegration
  • 🎵Expressive
  • 💻Good for travel
  • 🎨Beautiful GUI
  • 🚀Fast development updates
  • 💰Good value for price

Negative things

  • 🐛Crashing frequently
  • ⚠️Unstable on newer iOS
  • 🎛️Cumbersome sound switching
  • 📉Poor performance
  • unresponsivecontrols
  • 🚫No sound issues
  • ⏳Slow envelopes
  • 🐞Bugs in AUv3
  • ⚫Black borders on screen
See all reviews

What's New in VOLT Synth

1.4.5

October 27, 2020

1.4.5 (190) - Fixed an issue where attempting to connect BLE MIDI devices would cause the app to crash in some cases - Fixed an issue where effect controls would not work properly - Fixed an issue where the preset browser was missing when running on an iPhone 11 Pro Max or iPhone Xs Max

More
16

In-App Purchases

Free

Dub Pack

16 sweet Synth Dub Patches

Charts

Top Paid

📉 196-16

Music

This app dropped -16 positions in Music chart.

Last updated on August 26, 2026.

User reviews

Most RecentHighest RatedLowest Rated

A truly beautiful synthesizer

This developer is an awesome musician, and every one of his inventions are not only unique in their own right, but highly intuitive and extremely useful. This particular GEM is a Godsend. Thank you!!!!!
EC0SphereEC0Sphere

WAS Beautiful... no fc's on key touch... latest ios IPhone 12 pro max

See above... can't get it to work anymore, but Will will conter this rating with a fine once usable again... PLEASE UPDATE!!!!!
EC0SMoNauTEC0SMoNauT

Crashing

I haven’t used for while but when I play it now it wont take midi input after about 30 seconds. Controls still work but no audio. Input via hardware keyboard and app in AUM.
Like it 2Like it 2

Vieles gut

Aber etwas, dass ich komplett unverständlich finde: warum ist es so schwer, zwei Felder für Sound vorwärts und Sound rückwärts zu integrieren? Ich möchte mich nicht entscheiden müssen, ob ich eine Soundanwahl oder den Synthesizer mit seinen Parametern sehe.

Loben muss ich die App für die Integration von MPE, gut gemacht. Klang stimmt auch. Aber ich spiele ihn einfach viel zu selten, wegen diesem umständlichen Soundwechsel. Kann natürlich sein, das ich einfach zu blond bin, um diese Buttons zu finden, aber ich habe mir Mühe gegeben.
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Tai_HDTai_HD

👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼👎🏼

Not a trustable developer doesn’t fix bugs
Greg.niGreg.ni
See 57 more reviews

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User experience

🐞

Reported Bugs

18 issues

No MIDI input after 30 seconds

Bug

Crashing when using multiple AU instances

Bug

Presets disappear after iOS 14 update

Bug

Standalone mode broken on recent iOS

Bug

AU3 not working in Cubasis/NanoStudio 2

Bug

Crashes with iCloud Drive for patch storage on iOS 13

Bug

Preset scroller not accessing sounds

Bug

Stability issues on iOS 12

Bug

UI issues in AU mode on iPhone

Bug

No sound after last update

Bug

Presets not loading

Bug

AUv3 UI lacks preset selection slot

Bug

Preset saving crashes app

Bug

Digital readout under controls obscured by finger

Bug

Latched key graphic disappears

Bug

Legato mode doesn't work with aftertouch

Bug

Pitch bend limited to 12 steps

Bug

Global pitch bend setting disappeared

Bug
✨

Requested Features

7 requests

Two fields for sound forward/backward

Feature

New features and sounds for MPE

Feature

Dedicated strings section in presets

Feature

Randomize function for LFOs/envelopes

Feature

Larger fonts in preset display

Feature

Improve envelope snappiness

Feature

Improve modulation routing options

Feature

FAQ

What is VOLT Synth?

VOLT Synth is a virtual analog synthesizer application designed to create classic synth sounds with an emphasis on expressive playability. It features a robust synth engine with support for multidimensional polyphonic expression (MPE), making it ideal for users with MPE controllers.

What are the key features of VOLT Synth?

Key features include a polyphonic virtual analog synth engine with MPE and aftertouch support, five keyboard layouts, built-in stereo effects like chorus, delay, and reverb, over 100 factory presets, and compatibility with various MPE hardware and software. It also supports standalone operation and integration with other music apps.

How is VOLT Synth monetized?

The application is offered for free, but it includes in-app purchases. This model allows users to explore the core functionality before deciding to purchase additional features or content.

What devices is VOLT Synth compatible with?

VOLT Synth is designed for mobile devices and supports standalone operation, Audio Unit v3 Extension, Inter App Audio, and Audiobus. It is compatible with MPE MIDI hardware like ROLI Seaboard and LinnStrument, as well as regular MIDI keyboards with aftertouch and pitch/mod wheels.

What are common use cases for VOLT Synth?

Common use cases include creating expressive synth leads, pads, and basslines for electronic music production. Its MPE support makes it particularly well-suited for dynamic and nuanced performances, especially when paired with compatible controllers like the ROLI Seaboard.