# VAPolyMk4 — Polyphonic Synthesizer

> Bi-timbral polyphonic synthesizer with advanced sound design features and AUv3 support. (iPhone/iPad app by Ryo Togawa.)

- Source: https://appshunter.io/ios/app/vapolymk4/id6753038075 (this page in markdown: same URL + `.md`)
- Developer: [Ryo Togawa](https://appshunter.io/developer/1474193056)
- Category: Music
- Price: $5.99 (on sale, was $14.99)
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 20 MB
- Languages: American English
- Released: 2025-10-22
- Data updated: 2026-09-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/vapolymk4/id6753038075/reviews.md

## What is VAPolyMk4?

VAPolyMk4 is bi-timbral polyphonic synthesizer, which features output morphing, classic ring modulator and global offset parameter control. Each synthesizer consists of three oscillators, resonant  low pass and  hight pass filter, amplifier, three envelope generators and two LFO. Two synthesizers can be configured as layer or split.

VAPolyMk4 operates as a stand alone or as an AudioUnit Extension (AUv3) for iPhone, iPad and Mac. Stand Alone supports Ableton Link, MIDI and audio file export. Built-in Effects include delay, chorus, flanger, reverb, eq and compressor. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. 

Main Features

Bi-timbral Polyphonic Synthesizer.
Output morphing.
Classic Ring Modulator.
Global Offset Parameter Control.
Three oscillators featuring hard sync and through zero FM.
Maximum 8 voice polyphony. it depends on performance of the device it is running.
Built-in effects and piano roll sequencer.
Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC)
Support Audio Unit Extension (AUv3).
Support MIDI 2.0. Support Foot Pedal and Per Note Control.
Support Ableton Link, Bluetooth MIDI, MIDI In / Out.
Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms.
Full Factory Preset: 230, Synth CH: 160, Effect: 40

Improvements
Support MIDI Foot Pedal (CC#11, CC#64)
Support MIDI2.0 Per Note Control Messages
MIDI CC Settings are saved. It will be recovered when the app launched in the next time.
UI Color can be selected from black, navy or gray.

System Requirements

iOS 17.0 or later
Devices with Apple Silicon are recommended. A13 Fusion or above is highly recommended. if sound is distorted when using a device with less CPU power, reduce number of voices.
AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension.
AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS.  For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension.

## Key features

- Bi-timbral polyphonic synthesis
- Output morphing and ring modulator
- Multiple oscillators, filters, and envelopes
- Standalone and AudioUnit Extension (AUv3) support
- Built-in effects and piano roll sequencer
- MIDI 2.0 and Ableton Link support
- iCloud Drive for project sharing

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/vapolymk4/id6753038075/reviews.md

### 5/5 — Great as are all the rest!

*2026-05-24*

I love all of this creator’s synths. They ARE all different with different features, similar interface but I especially love the synths this person makes that have generative presets.
This one does, and I believe four others that I’ve purchased so far.
Keep these amazing synths coming!

## Frequently asked questions about VAPolyMk4

### What is VAPolyMk4?

VAPolyMk4 is a bi-timbral polyphonic synthesizer application that offers advanced sound design capabilities. It can function as a standalone application or as an AudioUnit Extension (AUv3) on compatible Apple devices.

### What are the main sound generation features of VAPolyMk4?

Each synthesizer within VAPolyMk4 features three oscillators with hard sync and through-zero FM, resonant low-pass and high-pass filters, an amplifier, three envelope generators, and two LFOs. It supports up to 8 voice polyphony, depending on device performance.

### Can VAPolyMk4 be used with other music software?

Yes, VAPolyMk4 supports AudioUnit Extension (AUv3), allowing it to be used within DAWs like Apple Logic and GarageBand on iOS and macOS. It also supports Ableton Link, Bluetooth MIDI, and standard MIDI In/Out.

### What audio export options does VAPolyMk4 offer?

VAPolyMk4 allows for audio export in Linear PCM formats such as AIFF, WAV, and CAF, as well as compressed formats like AAC. This enables users to export their creations for use in other projects.

### How does VAPolyMk4 handle project saving and sharing?

Project files can be saved directly to iCloud Drive, enabling seamless access and editing across iPhone, iPad, and Mac devices. This feature ensures your work is always synchronized and available.

### What are the system requirements for VAPolyMk4?

VAPolyMk4 requires iOS 17.0 or later. Devices with Apple Silicon, particularly A13 Fusion or above, are recommended for optimal performance. If sound distortion occurs on less powerful devices, reducing the number of voices is advised.

### How much does VAPolyMk4 cost?

VAPolyMk4 is a paid application, priced at $5.99. There are no in-app purchases or subscription fees associated with its use.

### Does VAPolyMk4 have ads?

No, VAPolyMk4 does not contain advertisements. As a paid application, it provides an uninterrupted user experience without any ad interruptions.

## Version history (last 2 releases)

### 1.0.1 — 2025-12-17

Version 1.0.1 contains improvements and bug fixes.
- Updated UI of CV Sequencer.

### 1.0 — 2025-10-22

No release notes.

## Apps similar to VAPolyMk4

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Big Swarma](https://appshunter.io/ios/app/big-swarma/id6747882165) | 5.0 (6) | $9.99 | Music |
| [NovaLimit - Spatial Limiter](https://appshunter.io/ios/app/novalimit-spatial-limiter/id6752733727) | 5.0 (2) | $9.99 | Music |
| [Testere Supersaw Synth AUv3](https://appshunter.io/ios/app/testere-supersaw-synth-auv3/id6747269039) | 5.0 (1) | $7.99 | Music |
| [NovaDrive - Spatial Distortion](https://appshunter.io/ios/app/novadrive-spatial-distortion/id6754496436) | — | $9.99 | Music |
| [Nostalgia FX](https://appshunter.io/ios/app/nostalgia-fx/id6749879123) | 5.0 (1) | $9.99 | Music |
| [RedNova - Spatial Compressor](https://appshunter.io/ios/app/rednova-spatial-compressor/id6749191303) | 5.0 (1) | $9.99 | Music |

## More apps by Ryo Togawa

- [VADrumSM](https://appshunter.io/ios/app/vadrumsm/id1474193057)
- [ChannelEqualizer](https://appshunter.io/ios/app/channelequalizer/id1513527511)
- [ChStrip](https://appshunter.io/ios/app/chstrip/id1518510831)
- [TfxEcho](https://appshunter.io/ios/app/tfxecho/id1523777426)
- [TfxMod](https://appshunter.io/ios/app/tfxmod/id1524639578)
- [TfxReverb](https://appshunter.io/ios/app/tfxreverb/id1529840178)

All apps by Ryo Togawa: https://appshunter.io/developer/1474193056

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*