# VAPolyBass — Polyphonic Synthesizer

> Polyphonic synthesizer with step sequencer and built-in effects for music production. (iPhone/iPad app by Ryo Togawa.)

- Source: https://appshunter.io/ios/app/vapolybass/id6759211714 (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 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 16 MB
- Languages: American English
- Released: 2026-02-19
- Data updated: 2026-09-05
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/vapolybass/id6759211714/reviews.md

## What is VAPolyBass?

VAPolyBass features -24 dB per octave transistor ladder low pass filter and it is designed for playing with step sequencer. This polyphonic synthesizer consists of three oscillators, resonant low pass filter resonant high pass filter, amplifier, ADSR envelope and five LFOs.

VAPolyBass 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

- Polyphonic Synthesizer.
- Lowpass filter modeled on -24dB per oct transistor ladder filter.
- Analog style step sequencer.

- 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.
- Support Ableton Link, Bluetooth MIDI, MIDI In / Out.
- Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms.
- Factory Preset: 128, Effects: 40

Improvements

- Support MIDI Foot Pedal (CC#11, CC#64)
- 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, gray or steel.

System Requirements

- iOS 17.0 or later
- Devices with Apple Silicon are recommended. A13 Fusion or above is highly 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. 
- Sound may be distorted if CPU of the device doesn't have enough power. If it happens reduce number of voices.

## Key features

- Polyphonic synthesizer
- Transistor ladder low pass filter
- Analog style step sequencer
- Multiple oscillators and LFOs
- Built-in effects (delay, chorus, reverb, etc.)
- AudioUnit Extension (AUv3) support
- MIDI 2.0 and Ableton Link support

## Chart rankings

- #195 in Top Paid · Music (US App Store)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/vapolybass/id6759211714/reviews.md

### 5/5 — Great Synth, Sonically Brilliant

*2026-04-29*

The VAPolyBass is a great sounding synth but I have found the Pitch Bend range parameters are not exposed and is permanently locked at 1 octave up and down, but using the KeyStage Keyboard Controller app to bend just 2 semitones when using a MIDI keyboard is brilliant.  This is a first rate Synth App

## Frequently asked questions about VAPolyBass

### What is VAPolyBass?

VAPolyBass is a polyphonic synthesizer application that features a transistor ladder low pass filter and is designed for use with a step sequencer. It can be used as a standalone app or as an AudioUnit Extension (AUv3).

### What are the main features of VAPolyBass?

Key features include polyphony up to 8 voices, a resonant low pass and high pass filter, ADSR envelope, five LFOs, built-in effects like delay and reverb, and an analog-style step sequencer with a piano roll.

### What platforms does VAPolyBass support?

VAPolyBass is available for iPhone, iPad, and Mac. Project files can be saved in iCloud Drive for seamless sharing across these devices.

### Does VAPolyBass have ads?

No, VAPolyBass does not contain advertisements. It is a paid application that offers a full, uninterrupted music production experience.

### What are the system requirements for VAPolyBass?

VAPolyBass requires iOS 17.0 or later. Devices with Apple Silicon, specifically A13 Fusion or above, are highly recommended for optimal performance. AUv3 support requires a compatible host application.

### How does VAPolyBass handle audio export?

The application supports audio export in Linear PCM formats (AIFF, WAV, and CAF) as well as compressed formats like AAC. This allows for flexible integration into various production workflows.

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

Yes, VAPolyBass supports AudioUnit Extension (AUv3), which is compatible with DAWs like Apple Logic and GarageBand on iOS and macOS. It also supports Ableton Link and various MIDI connections.

### What is the price of VAPolyBass?

VAPolyBass is available for a one-time purchase of $5.99. There are no in-app purchases or subscription fees associated with the application.

## Version history (last 3 releases)

### 1.0.2 — 2026-05-26

Version 1.0.2 contains bug fixes and improvements.
- Fixed a problem of recording notes in piano roll editor.

### 1.0.1 — 2026-04-28

Version 1.0.1 contains bug fixes and improvements.
- Fixed a problem that preset can’t be changed by external keyboard or sequencer if keypad is not visible on screen.
- Fixed a problem of slide time when slide switches are turned on in step sequencer.
- Added options to change text size of control titles.

### 1.0 — 2026-02-20

No release notes.

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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 2026-09-05.*