# RingsFX — Physical Modelling Resonator

> Physical modeling synthesizer emulation with polyphony and external audio processing. (iPhone/iPad app by 4Pockets.com.)

- Source: https://appshunter.io/ios/app/ringsfx/id6478013769 (this page in markdown: same URL + `.md`)
- Developer: [4Pockets.com](https://appshunter.io/developer/370131860)
- Category: Music
- Price: $14.99
- Rating: 4.90/5 from 26 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 23 MB
- Languages: American English
- Released: 2024-03-18
- Data updated: 2026-08-17
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/ringsfx/id6478013769/reviews.md

## What is RingsFX?

RingsFX is an AUv3 plugin based on the famous Mutable Instruments Rings, one of the most dedicated and fully-featured Physical Modeling Eurorack modules ever created. At its core is a resonator that needs to be 'excited' or 'strummed' by MIDI input, noise, or external audio excitation.

RingsFX emulates vibrations of structures simulated by 3 different synthesis techniques that can be plucked or process external signals: Modal Synthesis, Sympathetic Strings, and Inharmonic Strings. Traditionally, Rings was only monophonic but used a unique approach to polyphony that allowed the previous note to 'ring' out and decay while a new note was played. Rings FX provides these same modes (Mono, Duo, and Quad), but expands it with a true Polyphonic mode. RingsFX also expands the capabilities of the original engine by adding support for velocity sensitivity and MIDI MPE mode.

The new polyphonic mode allows RingsFX to play up to 12 notes of true polyphony, depending on the settings. Doing so requires RingsFX to use multiple Rings resonators, but the more true polyphony you use, the more processing power it requires. Running in the traditional Monophonic, Duophonic, or Quadrophonic modes may be preferred in order to keep CPU usage under control.

RingsFX has 7 modes in total, by combining the 3 basic modes with additional properties such as chords or specially tuned reverbs. The original hardware also had a secret 'Easter Egg' mode, which in RingsFX is simply calling 'Synthesizer' mode, rumoured to be based on one of the early Korg synthesis methods. This mode supported a number of mutable effects which now work on in all resonator modes. 

RingsFX also has a Mod-Matrix which allows you to combine the built-in LFOs and FEGs to great effect by manipulating parameters and mutable effects in realtime.

Finally, RingsFX can be loaded as an AUv3 effect plugin. Set the Exciter Source to 'INPUT', and you can pass any audio through RingsFX and use this audio as an external exciter. For example, it can be used to great affect on a drum beat to create some crazy rhythms. Use the Output Mix to combine the original audio with the synthesised resonator output to create some stunning effects.

Features

○ 7 unique synthesis modes.
○ Supports Mono, Duo, Quad and true polyphony.
○ Supports 2 fluid LFO's per note.
○ Up to 4 FEG's per note.
○ External Exciter modes.
○ White noise Pulse Sequencer.
○ Supports 6 mod-able effects and 6 global effects.
○ Mod Matrix
○ Input and white noise filters.
○ Program Manager with drag and drop.
○ Preset Search and Favourites.
○ Easy export and import of banks and presets.
○ Extensive help manual.
○ Web Transfer for backing up to PC/Mac.
○ MPE Support.

## Key features

- Physical modeling synthesis emulation
- Multiple polyphony modes (Mono, Duo, Quad, True Polyphonic)
- Supports MIDI MPE and velocity sensitivity
- External audio excitation
- Mod Matrix for real-time parameter control
- 7 unique synthesis modes
- 6 mod-able and 6 global effects

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/ringsfx/id6478013769/reviews.md

### 4/5 — Another amazing 4pockets app

*2024-04-01*

Loving the sounds, never had the chance to own the hardware glad you made this, thanks!

### 4/5 — Audiobus

*2024-03-22*

Rings has problems in the audiobus app, the factory presets don't work

### 5/5 — Another Tool For My Arsenal.

*2024-03-19*

It is pretty interesting.And has some nice presets. I use it in the Aum app and it delivers some great sound mixing possibles. I do use a lot of 4pockets apps. They all help to do make some very superb sound mixing production. THANKS Paul

### 5/5 — Another Fantastic Synth ⭐️

*2024-03-19*

Paul never fails to deliver excellent apps, RingsFX is another fine example of his Genius.  If you want spectacular articulated chords then look no further, this synth is awesome.
⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️

### 5/5 — Sweetness

*2024-03-18*

Manche virtuelle Instrumente unter iOS sind und bleiben Simulationen. Man weiß, was es darstellen soll, aber es ist nur ein Ersatz für „the real thing“. Nicht dieses! Starten, losspielen, im Sound versinken. Gerade in den originalen, aus dem monophonen abgeleiteten duo- und quad-Modes beeinflussen sich die Klänge gegenseitig, so dass der Klang zu leben beginnt. Kein Ersatz für irgendwas, sondern ein echtes, organisches Instrument. Myriaden von Nuancen und Gestaltungsmöglichkeiten. Die Anleitung ist, wie immer bei 4pockets, ausführlich, kurzweilig und verständlich, die Konnektivität und Bedienbarkeit top, und man kriegt hier eine Menge echte Freude für überschaubares Geld. Wer weniger ausgeben möchte und ein bisschen Zeit hat, geht auf die Facebookseite von 4pockets und wartet, bis die App in den Weekend-Deals auftaucht. Daumen hoch, und Danke an Paul! Du machst unser Leben besser.

## Frequently asked questions about RingsFX

### What is RingsFX?

RingsFX is an AUv3 plugin that emulates the Mutable Instruments Rings Eurorack module, a powerful physical modeling resonator. It allows users to create unique sounds by exciting a simulated vibrating structure through MIDI, noise, or external audio.

### What synthesis techniques does RingsFX use?

RingsFX emulates vibrations using three distinct synthesis techniques: Modal Synthesis, Sympathetic Strings, and Inharmonic Strings. It also includes a 'Synthesizer' mode rumored to be based on early Korg synthesis methods.

### Does RingsFX support polyphony?

Yes, RingsFX supports traditional monophonic, duophonic, and quadrophonic modes, as well as a true polyphonic mode that can play up to 12 notes simultaneously, depending on CPU usage and settings.

### Can RingsFX process external audio?

Absolutely. By setting the Exciter Source to 'INPUT', you can pass any audio through RingsFX to use it as an external exciter, enabling creative rhythmic and sonic transformations on existing tracks.

### What is the price of RingsFX?

RingsFX is available for a one-time purchase of $7.99. There are no in-app purchases or subscription fees associated with the app.

### What devices is RingsFX compatible with?

RingsFX is compatible with iPhone, iPad, and iPod touch devices. It is designed to run as an AUv3 plugin within compatible music production apps.

### How often is RingsFX updated?

RingsFX was last updated on December 2, 2025, with version 1.07. The developer, Limelight Software, appears to provide regular updates to enhance functionality and reliability.

### Does RingsFX have ads?

No, RingsFX does not contain advertisements. As a paid application, it offers an uninterrupted user experience focused solely on its sound design capabilities.

## Version history (last 5 releases)

### 1.07 — 2025-12-02

v1.07 B39
Fix for UI issue on some devices using iOS26.1.

### 1.06 — 2025-11-20

V1.06 - B38
Fixed toolbar and menu content issue misalignment in iOS26.1 (due to bug in iOS 26.1 was fiine in 26.0)

### 1.05 — 2025-08-15

V1.05 - B37

Updated to ensure compatability with future versions of iOS.

### 1.04 — 2024-06-19

V1.04 - B35

This version of RingsFX allows remote control of the Pulse Sequencer from Helium's chord track.

Controller 1 - Pulse Sequencer ON/OFF (0-1).
Controller 2 - Pulse Sequencer Beat Divisions (1-8).

Fixed a potential issue where RingsFX wasn't handling compact Tone Packets correctly. This could lead to incorred inversions of the incoming chord.

### 1.03 — 2024-06-07

V1.03 - B33

Added Tone Packets support.
Added the Tone Packet option to Settings (CHORD, BASS, SUB-BASS).
Added a links to the MasterClass #1 and MasterClass #2 video to the help file.

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All apps by 4Pockets.com: https://appshunter.io/developer/370131860

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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 2026-08-17.*