# VAPolyMkII — Bitimbral Poly Synthesizer

> Virtual analog bitimbral polyphonic synthesizer with sequencer and effects. (iPhone/iPad app by Ryo Togawa.)

- Source: https://appshunter.io/ios/app/vapolymkii/id6476809566 (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: 4.60/5 from 11 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 16 MB
- Languages: American English
- Released: 2024-01-30
- Data updated: 2026-09-06
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/vapolymkii/id6476809566/reviews.md

## What is VAPolyMkII?

VAPolyMkII is a virtual analog bitimbral polyphonic synthesizer for iPhone, iPad and Mac. It features 16 voice synthesizer, effects, sequencer and audio visualization tools. It operates as a stand alone or as an AudioUnit Extension (AUv3).  Stand Alone supports Ableton Link, MIDI and audio file export.

The synthesizer consists of two 8 voice synthesizer, which features two oscillators, two ADSR envelopes, resonant high pass and low pass filter and an amplifier per voice. The oscillators features continuously variable wave shape and wide variety of modulation. The filters are modeled on the Sallen-Key filter circuit and cascaded OTA filter circuit for classic analog sound. The Effects include delay, chorus, flanger, reverb, eq and compressor.  The sequencer features piano roll and parameter automation editor to program 16 bar pattern per clip. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. 

- Main Features -
Virtual analog 16 voice bitimbral polyphonic synthesizer 
Two type of Lowpass filter, cascaded OTA model and Sallen-key model.
Patch points for modulation.
Support MIDI 2.0
New User Interface built by SwiftUI for improved performance.
Built-in Sequencer. 16 bar patterns per clip. Total 8 clips. Piano Roll and Parameter automation.
Support Audio Unit Extension (AUv3)
Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms.
Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC)
Support Ableton Link, Bluetooth MIDI, MIDI In / Out.

- System Requirements -
A13 Fusion or above is recommended.
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

- 16-voice bitimbral polyphonic synthesizer
- Two analog-modeled filter types
- Extensive modulation capabilities
- Built-in piano roll sequencer
- Multiple audio effects
- AudioUnit Extension (AUv3) support
- iCloud Drive project syncing

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/vapolymkii/id6476809566/reviews.md

### 5/5 — Don’t listen to the other idiot reviewer

*2024-02-20*

What a guy can’t even reach out for help just leaves a negative comment ! You are a hard working dev and always updating his apps and fixes any bugs that pop off which I haven’t had one personally. Try restarting your iPad iPhone first because a lot of the time the auv3 portion of the app doesn’t show in many apps till a restart is done. I seriously cannot believe the nerve of some people! Great dev synth is 5* sound Is XL!

### 1/5 — Zero stars. App immediately crashes; won’t open

*2024-02-18*

Bunk

## Frequently asked questions about VAPolyMkII

### What is VAPolyMkII?

VAPolyMkII is a virtual analog bitimbral polyphonic synthesizer designed for iPhone, iPad, and Mac. It offers a 16-voice sound engine, built-in effects, and a sequencer, functioning as a standalone app or an AudioUnit Extension.

### What are the main features of VAPolyMkII?

Key features include a 16-voice polyphonic engine, two types of analog-modeled low-pass filters (cascaded OTA and Sallen-Key), patch points for modulation, a 16-bar sequencer with piano roll and parameter automation, and various built-in effects like delay and reverb.

### Does VAPolyMkII support MIDI?

Yes, VAPolyMkII supports MIDI 2.0, Ableton Link, Bluetooth MIDI, and standard MIDI In/Out connections. This allows for integration with external MIDI controllers and synchronization with other music software.

### Can I use VAPolyMkII with other music apps?

Yes, VAPolyMkII supports AudioUnit Extension (AUv3), enabling it to be used as a plugin within compatible DAWs like Apple Logic and GarageBand on iOS and macOS. Other DAWs' support for AUv3 may vary.

### How can I share projects between devices with VAPolyMkII?

VAPolyMkII utilizes iCloud Drive for saving and accessing project files. This allows you to seamlessly work on your projects across your iPhone, iPad, and Mac devices.

### What are the system requirements for VAPolyMkII?

An A13 Fusion chip or above is recommended for optimal performance. For AudioUnit Extension (AUv3) functionality, a host application that supports this feature is required.

### What audio export formats does VAPolyMkII support?

VAPolyMkII allows for audio export in Linear PCM formats such as AIFF, WAV, and CAF. It also supports compressed formats like AAC.

### How much does VAPolyMkII cost?

VAPolyMkII is a paid application, available for a one-time purchase price of $5.99.

## Version history (last 5 releases)

### 1.3.1 — 2024-06-20

Version 1.3.1 contains improvements and bug fixes.
- Fixed a problem that editing function of clip editor doesn’t work correctly.

### 1.3 — 2024-05-23

Version 1.3 contains improvements and bug fixes.
- Added legato option When unison mode is turned on. Legato is turned on when value of the glide time is greater than minimum value. 
- Fixed a problem that visualizer doesn’t update properly when unison mode is on.
- Fixed a problem that envelope doesn’t reset by note off event in some cases.
- Fixed a problem that arpeggio doesn’t work properly when unison switch is turned on.
- Fixed a problem that preset doesn’t be loaded properly when clip is changed.
- Fixed a problem that record count in doesn’t work correctly.
- Fixed a problem that recording doesn’t start from loop start position.

### 1.2.0 — 2024-04-19

Version 1.2.0 contains improvements and bug fixes.
- Added 150 factory presets.
- Fixed a problem that audio visualizer doesn’t update properly when note is changed.
- Fixed a problem that patch connections are not updated when factory preset is changed.

### 1.1.0 — 2024-03-29

Version 1.1.0 contains improvements and bug fixes.
- Added an option to show compact keyboard on iPhone.
- Fixed a problem that changing destination of patch cable doesn’t work properly.
- Fixed a problem of state restoration.

### 1.0.10 — 2024-03-15

Version 1.0.10 contains improvements and bug fixes.
- Improved parameter value slider in top bar. Parameter menu is now enabled by double tap.
- Improved user interaction of patch bay editor.
- Fixed a problem of note label in piano roll when Heptatonic mode is selected.

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## 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

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*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 2026-09-06.*