# VAPolyTZFM — Polyphonic TZFM Synthesizer

> Polyphonic synthesizer with Through Zero FM, AUv3 extension, and built-in effects. (iPhone/iPad app by Ryo Togawa.)

- Source: https://appshunter.io/ios/app/vapolytzfm/id6747690642 (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 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 17 MB
- Languages: American English
- Released: 2025-06-24
- Data updated: 2026-09-06
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/vapolytzfm/id6747690642/reviews.md

## What is VAPolyTZFM?

VAPolyTZFM is polyphonic synthesizer featuring Through Zero FM, which is a type of linear frequency modulation and it is capable to maintain the pitch therefore it can deliver more musical results.

VAPolyTZFM 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

Through Zero FM
Analog Style Step Sequencer.
Eight Assignable Controllers.
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.
Include 256 Factory Presets.

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.

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

- Through Zero FM synthesis
- AudioUnit Extension (AUv3) support
- Ableton Link and MIDI connectivity
- Built-in effects suite
- iCloud Drive project sharing
- Analog style step sequencer
- Up to 8 voice polyphony

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/vapolytzfm/id6747690642/reviews.md

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

*2026-04-29*

The VAPolyTZFM 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

### 1/5 — Does not work with 16.7.11

*2025-07-12*

No indication before the purchase, but they took my money. Not honest.

## Frequently asked questions about VAPolyTZFM

### What is Through Zero FM in VAPolyTZFM?

Through Zero FM is a type of linear frequency modulation that maintains pitch, allowing for more musical and stable sound results compared to traditional FM synthesis.

### Can VAPolyTZFM be used with other music apps?

Yes, VAPolyTZFM functions as an AudioUnit Extension (AUv3), which can be used within compatible host applications like Apple Logic and GarageBand on iOS and macOS.

### What devices does VAPolyTZFM support?

VAPolyTZFM is available for iPhone, iPad, and Mac. Devices with Apple Silicon, particularly A13 Fusion or above, are recommended for optimal performance, especially for higher polyphony counts.

### How does VAPolyTZFM handle project files?

Project files can be saved to iCloud Drive, enabling seamless access and editing of your work across your iPhone, iPad, and Mac devices.

### What kind of audio export options does VAPolyTZFM offer?

VAPolyTZFM supports exporting audio in Linear PCM formats (AIFF, WAV, CAF) and compressed formats like AAC, providing flexibility for your production workflow.

### Does VAPolyTZFM have ads?

No, VAPolyTZFM does not contain advertisements. It is a paid application that offers a complete, ad-free experience.

### What is the update frequency for VAPolyTZFM?

The app was last updated on March 27, 2026, indicating active development and support. Users can expect ongoing improvements and feature additions.

### What are the system requirements for VAPolyTZFM?

VAPolyTZFM requires iOS 17.0 or later. While it runs on various devices, Apple Silicon Macs and newer iPhones/iPads are recommended for the best experience due to performance demands.

## Version history (last 2 releases)

### 1.0.1 — 2026-03-27

Version 1.0.1 contains improvements and bug fixes.
- Fixed a problem of midi note input monitoring.
- Fixed a problem that text color and background color of text input field displayed as white in some circumstances.

### 1.0 — 2025-06-25

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 2026-09-06.*