# DXi FM synthesizer

> 80s-inspired FM synthesizer for sound creation and music performance. (iPhone/iPad app by Takashi Mizuhiki.)

- Source: https://appshunter.io/ios/app/dxi-fm-synthesizer/id370138065 (this page in markdown: same URL + `.md`)
- Developer: [Takashi Mizuhiki](https://appshunter.io/developer/370138068)
- Category: Music, Entertainment
- Price: $1.99
- Rating: 4.30/5 from 19 App Store ratings · 153 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.4 · 5 MB
- Languages: American English
- Released: 2010-05-05
- Data updated: 2026-09-09
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/dxi-fm-synthesizer/id370138065/reviews.md

## What is DXi FM synthesizer?

DXi is a FM synthesizer application inspired by 80's most popular FM synthesizer. You will enjoy creating sounds as well as playing music with this application.

FM synthesizer is still popular among many people by its unique tone. We carefully selected parameters from original synthesizer so you will be enjoy editing tone with them easily. You need to know some technique to tweak the tone, but you will be able to get DXi's special tone and effects while having some fun!
Creating sound effects is another idea to enjoy DXi.

We loaded 16 step loop sequencer as a bonus feature!

If you remember the days of FM synthesizers, try creating the tone you remember from them.
If you have no experience with any FM synthesizer, we are sure you will be enjoying the unique tone world!

* 4 operators FM synthesizer
* Anti-ailiased oscillator
* 8 algorithms
* Envelope, frequency (Ratio or Fixed), waveform (12 types) can be set each operators.
* Feedback control on operator number 4.
* 2 master effects (LPF with Resonance and Delay)
* Unison mode
* Spectrum and oscilloscope view
* Import/Export function to save the tone you created. (URL schema text string format)
* Audio recording function. And you can transport recorded audio file, .wav, onto Mac/PC via iTunes file sharing.
* Clipboard audio sharing support. You can export recorded waveform to other application via clipboard. It's compatible with Intua's clipboard.
* Supports external MIDI keyboards via Core MIDI USB adapters.
* Supports background audio and virtual MIDI input port.
* Supports Audiobus.

## Key features

- 4 operator FM synthesis
- 8 algorithms
- Adjustable operator parameters
- Master LPF and Delay effects
- 16-step loop sequencer
- Audio recording and export
- MIDI keyboard support

## Recent user reviews (10 of 153)

All indexed reviews: https://appshunter.io/ios/app/dxi-fm-synthesizer/id370138065/reviews.md

### 5/5 — Beautiful synthesizer

*2026-06-03*

My introduction to synths on ios-this is the one that i absolutely loved starting out on, debate the sounds are truly remarkable

### 2/5 — 堀さん

*2025-10-03*

FM音源は多くのメーカーが出しているが、これより良い物は無いと思う。驚異的な完成度。

2025年10月追記
今は良いFM音源が多く有るので、優位性は無くなったと思う。

### 5/5 — Das Teil rockt

*2025-08-16*

Der typischeFM Klang, der direkt ins Hirn geht :)

Und ausserdem auch perfekt, um FM-Synthese endlich zu verstehen.

### 5/5 — Bellissima

*2021-03-04, version 3.10.0*

Speriamo in un upgrade a sei operatori

### 5/5 — Its good!

*2020-11-26*

I feel like this FM synth is one of the best on mobile!
You did a great job.
However, I would like it more if you did more on the feedback control.
There isnt as much feedback as you would find on other fm synths so that would be great if you fixed that!
Anyway great synth!

### 5/5 — Great buy ! 😎

*2020-10-07*

Just great to find a good FM synth for this price ! As others have said, some midi routing would be great. Also not sure how to save presets as yet but twenty minutes in and I am loving it !!! Domo arigato Tak-San

### 1/5 — おすすめしません

*2020-05-31*

最近のiOSでは正常に動作しません。

### 5/5 — Excellent DX7 Emulation

*2018-10-09, version 3.10.0*

This app is great for everyone wanting dx7 sounds in your hand, on the go, without a DAW. The only reason ive given it three stars is the lack of ability to change the keyboard size. The keys are too chunky for a mobile screen for some people, but it still works

### 5/5 — This is one of the best IOS on the store

*2018-04-10, version 3.10.0*

This is AMAZING, not only for the sounds but the layout is Super fast and intuitive, the step sequencer is the best so fare.
I just with it could send notes out 
Worth the purchase

### 5/5 — buy it

*2018-02-05*

i’ve bought almost all of the midi keyboard apps currently available and i want to tell every perspective buyer that this one blends with real instruments (acoustic guitars, bass, drums) better than ANY of the high dollar synth apps out there and for a small fraction of the price. seriously, hundreds of dollars spent and this is the app that i end up using over and over when it’s time to add “keyboards” to human made music. buy it

## Frequently asked questions about DXi FM synthesizer

### What is DXi FM synthesizer?

DXi is a mobile application that functions as a FM synthesizer, inspired by popular 80s hardware. It allows users to create unique sounds and music by adjusting various synthesis parameters and effects. The app also includes a 16-step loop sequencer for composing musical patterns.

### What are the key features of DXi FM synthesizer?

Key features include a 4-operator FM synthesizer engine with 8 algorithms, adjustable operator parameters like envelopes and waveforms, and feedback control. It also offers master effects such as LPF with resonance and delay, a unison mode, spectrum/oscilloscope views, audio recording, and import/export functions for created tones.

### How much does DXi FM synthesizer cost?

The application is a paid app. There are no in-app purchases or advertisements mentioned, indicating a one-time purchase for full access to all features.

### What devices is DXi FM synthesizer compatible with?

The app supports external MIDI keyboards via Core MIDI USB adapters, background audio, and virtual MIDI input ports. It also supports Audiobus, allowing integration with other audio applications. Compatibility details for specific iOS versions are typically found in the app store listing.

### What are some common use cases for DXi FM synthesizer?

Users can employ DXi to recreate classic 80s FM synth sounds, design new and experimental sound effects, compose music using the built-in sequencer, and perform live with external MIDI controllers. It's suitable for both nostalgic users and those exploring the unique sonic possibilities of FM synthesis.

## Version history (last 5 releases)

### 3.10.0 — 2016-11-06

This update from Apple will improve the functionality of this app. No new features are included.

- Added MIDI CC#64 Dumper Pedal (Sustain) support
- Fixed minor bugs

### 3.9.0 — 2016-04-18

- Updated Audiobus SDK
- Updated AudioCopy SDK
- Increased the number of simultaneously emitted sounds

### 3.8.0 — 2015-02-09

- Added Bluetooth MIDI support

### 3.7.1 — 2014-09-26

- Supported iOS 8

### 3.7.0 — 2014-04-18

- Supported Inter-app audio
- Added Master Volume setting
- Fixed bugs

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## More apps by Takashi Mizuhiki

- [Web MIDI Browser](https://appshunter.io/ios/app/web-midi-browser/id953846217)

All apps by Takashi Mizuhiki: https://appshunter.io/developer/370138068

## Related topics

[synthesizer fm](https://appshunter.io/ios/topics/synthesizer-fm) · [dxi fm synthesizer](https://appshunter.io/ios/topics/dxi-fm-synthesizer) · [fm synth](https://appshunter.io/ios/topics/fm-synth) · [fm pocket synthesiser](https://appshunter.io/ios/topics/fm-pocket-synthesiser)

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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 2026-09-09.*