# RDX - FM Manager - AUv3 — Sysex .syx librarian & player

> FM synthesizer patch librarian and player with real-time preview. (iPhone/iPad app by Rubens Felicio.)

- Source: https://appshunter.io/ios/app/rdx-fm-manager-auv3/id6783084652 (this page in markdown: same URL + `.md`)
- Developer: [Rubens Felicio](https://appshunter.io/developer/6775565794)
- Category: Music, Entertainment
- Price: $1.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: +4
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-06-24
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/rdx-fm-manager-auv3/id6783084652/reviews.md

## What is RDX?

RDX turns your iPhone, iPad, Mac into a complete librarian for classic 6-operator FM (.syx) cartridges — with real preview.

Open .syx banks (32 or 64 voices) and HEAR every patch instantly, played by a faithful 6-operator FM engine, right on your device. No cloud, no account, no subscription.
• Real FM preview — play each voice on its own or stack several in a layer
• Velocity-sensitive keyboard + sustain pedal (CC64) + the authentic DX7 velocity curve
• Organize your collection: rename, drag to reorder, group, delete and merge voices
• Export fresh .syx cartridges for your DX7 or other apps
• Original "RSJB Signature" factory bank included — electric pianos, pads, strings and organs
• Multiplatform: iPhone, iPad, Mac  — plus an AUv3 plugin to play inside AUM, GarageBand, Logic and more
• One-time purchase. Everything stays on your device.

Built for DX7 owners, FM patch collectors, and anyone who wants to explore FM synthesis without the hardware.

RDX is an independent product, not affiliated with Yamaha.

## Key features

- Real FM patch preview
- Organize patch collections
- Export .syx cartridges
- Velocity-sensitive keyboard
- Multiplatform support
- AUv3 plugin included

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/rdx-fm-manager-auv3/id6783084652/reviews.md

### 5/5 — Extremamente simples e prático

*2026-06-26*

Facilitou demais a personalização dos meus timbres para o dx7

## Frequently asked questions about RDX

### What is RDX - FM Manager?

RDX - FM Manager is a mobile application that functions as a librarian and player for classic 6-operator FM synthesizer patches in .syx format. It allows users to preview, organize, and export these patches.

### Does RDX - FM Manager have ads?

No, RDX - FM Manager does not contain advertisements. It is a paid application with a one-time purchase model.

### What devices does RDX - FM Manager support?

RDX - FM Manager is available on iPhone, iPad, and Mac. It also offers an AUv3 plugin for use within compatible DAWs like GarageBand and Logic.

### How often is RDX - FM Manager updated?

The latest version, 1.6.4, was released on July 21, 2026, indicating recent development activity. Updates typically occur to add features or improve performance.

### Can I use RDX - FM Manager offline?

Yes, RDX - FM Manager operates entirely on your device without requiring a cloud connection or account. All functionality is available offline.

### What is the age rating for RDX - FM Manager?

RDX - FM Manager has an age rating of 4+, making it suitable for a wide range of users interested in music synthesis.

### Does RDX - FM Manager include any pre-loaded patches?

Yes, RDX - FM Manager includes the original "RSJB Signature" factory bank, featuring a variety of electric pianos, pads, strings, and organs.

### What is the price of RDX - FM Manager?

RDX - FM Manager is a one-time purchase priced at $1.99. All features are unlocked upon purchase, with no subscriptions or in-app purchases.

## Version history (last 5 releases)

### 1.8.0 — 2026-08-14

Improvements on FM performance

### 1.7.0 — 2026-07-28

Improvements on FM performance and read lcloud files.

### 1.6.4 — 2026-07-21

FM performance improvements

### 1.6.3 — 2026-07-19

Player improvements

### 1.6.1 — 2026-07-19

Minor corrections

Thank you for playing with RSJB - made by musicians for musicians!
Follow the news at www.rsjb.com.br/en

## More apps by Rubens Felicio

- [RSF2 — SF2 Manager - AUv3](https://appshunter.io/ios/app/rsf2-sf2-manager-auv3/id6775565792)
- [Tonic Synth — AUv3](https://appshunter.io/ios/app/tonic-synth-auv3/id6783345229)
- [REXS — EXS24 to SF2](https://appshunter.io/ios/app/rexs-exs24-to-sf2/id6789291199)
- [Tonic FX — Multi-Effects](https://appshunter.io/ios/app/tonic-fx-multi-effects/id6792166457)

All apps by Rubens Felicio: https://appshunter.io/developer/6775565794

## Related topics

[fm manager](https://appshunter.io/ios/topics/fm-manager)

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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 2026-08-14.*