# RRS Ivoks — Electromusical Synthesizer

> AUv3 analog emulation synthesizer with advanced sound shaping and MIDI control. (iPhone/iPad app by RRS, OOO.)

- Source: https://appshunter.io/ios/app/rrs-ivoks/id6443504248 (this page in markdown: same URL + `.md`)
- Developer: [RRS, OOO](https://appshunter.io/developer/1486125568)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Rating: 4.40/5 from 45 App Store ratings · 30 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 19 MB
- Languages: American English
- Released: 2022-10-09
- Data updated: 2026-08-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/rrs-ivoks/id6443504248/reviews.md

## What is RRS Ivoks?

RRS Ivoks AUv3 instrument — comes as time-limited Demo-version for you to try. It gives you 5 minutes of Free play time. (You can reload the RRS Ivoks AUv3 instrument as many times as you want, thereby you get the Demo period again and again.) Unlimited version of RRS Ivoks AUv3 instrument comes as In-App Purchase.

Features:

• Analog Emulation;
• Undo/Redo;
• A/B comparison;
• 2x/4x/8x Upsampling;
• Macro controllers;
• Scalable GUI.

On the centre panel are located two audio-frequency oscillators:

• OSC1 offers frequency Band regulator, five Waveforms and controls for LFO Modulation level plus OSC2 Cross-modulation;
• OSC2 offers the same frequency Band and Waveforms, an independent control for Modulation depth, plus Detuning.

Underneath these located the mixer, which offers level controls for the two Oscillators, the Noise generator, and Saturation Drive.

To the right of these, located the filter block. The top half is a standard ADSR envelope — until you flip the switch «Envelope mode», when it becomes a repeating AD-envelope instead. The four controls at the bottom adjust Cut-off, Resonance, LPF to BPF switch, Modulation level and Envelope level.

Next after the filter is the amplifier block, it also has ADSR envelope along with another Modulation level and Velocity sensitivity control. Again, the envelope can be switched to a Repeating Mode that generates a triangular waveform determined by the Attack and Decay settings, providing some of the instrument’s most distinctive effects.

The leftmost panels house the Modulation (LFO) controls (top), Mode which offers four waveforms, including noise, and a stepped Function for sample & hold (S&H) effects, well as Speed control.

And global settings such as the master Tune, master Volume, Legato mode, Monophonic and Duophonic operation and Unison switches, and the Glide control.

To use Ivoks as an instrument, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — RRS Ivoks will appear in the list of Audio Unit instruments in the host app.

MIDI CC Implementation Chart:

• CC#003 => HQ
• CC#009 => Saturation Drive
• CC#014 => Modulator Speed
• CC#015 => Modulator Mode
• CC#020 => Filter Attack
• CC#021 => AMP Attack
• CC#022 => Filter Decay
• CC#023 => AMP Decay
• CC#024 => Filter Sustain
• CC#025 => AMP Sustain
• CC#026 => Filter Release
• CC#027 => AMP Release
• CC#028 => Filter Envelope Mode
• CC#029 => AMP Envelope Mode
• CC#030 => OSC1 Band
• CC#031 => OSC2 Band
• CC#085 => OSC1 Waveform
• CC#086 => OSC2 Waveform
• CC#087 => OSC1 XMod
• CC#089 => OSC2 Detune
• CC#090 => MOD to OSC1
• CC#102 => MOD to OSC2
• CC#103 => OSC1 Level
• CC#104 => OSC2 Level
• CC#105 => Noise Generator
• CC#106 => Global Tune
• CC#107 => Global Glide
• CC#108 => Global Volume
• CC#109 => Global Voice
• CC#110 => Global Unison
• CC#111 => Global Retrig
• CC#112 => Filter Cut-off
• CC#113 => Filter Resonance
• CC#114 => Filter Mode
• CC#115 => MOD to Filter
• CC#116 => Filter Envelope
• CC#117 => MOD to AMP
• CC#118 => Velocity Sensitvity

## Key features

- Analog Emulation
- AUv3 Compatible
- Dual Oscillators
- Filter Block with ADSR
- Amplifier Block with ADSR
- Modulation (LFO) Controls
- MIDI CC Implementation

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| RRS Ivoks Unlimited | $8.99 | one-time |


## Recent user reviews (10 of 30)

All indexed reviews: https://appshunter.io/ios/app/rrs-ivoks/id6443504248/reviews.md

### 5/5 — Very cool synth

*2026-06-24, version 2.0.1*

Great lead sounds and sounds that “move”. Brings great sounds I don’t otherwise have. Plug a sequencer into it in AUM and it just sounds great and different than my other synths. I’ll get more stuff from this creator as I can… very impressed and pleased.

### 5/5 — Simple, fast, and sounds great

*2026-06-02, version 2.0.1*

What more could you ask for? I’ve been using the demo for a while, but I had to buy it because it’s so good. I have several other synth apps that I use for bass and pad sounds, but there’s something special about the sound of Ivoks. Pair that with a simple interface that makes playing fun and quick/easy to dial in, and it’s well worth the cost. Thank you for a great app!

### 1/5 — Arpeggios all the time

*2026-05-11, version 2.0.1*

No chance to switch off arp. How to switch it off???

### 1/5 — Please stop

*2025-12-30, version 2.0.1*

How do you stop the arpeggiator? That’s all this thing does to every preset.

### 5/5 — Presets and standalone problems

*2025-12-15, version 2.0.0*

I can now recommend this app. They have implemented global preset management, which means you can create a preset, save it in the Ivoks app, and retrieve the preset in any other host apps. Yes!
I really would love to use this in stand-alone mode, but it still just runs as a useless “demo”.
I’m giving it 5 stars, however, for the preset fix and for the sound quality.

### 5/5 — CC mapping was useful

*2025-07-31, version 1.0.2*

I’m loving this great synth even more with midi plugins to add things like filter keytrack and pitch envelope.
Possible bug: volume of the Noise generator drastically reduces when oversampling.

### 1/5 — Presets and standalone problems

*2025-07-09*

Can only save your own presets in the host you are using. Presets in one host are not available in others. So, if you make a preset and save it in AUM, it is not available in Logic Pro... you would have to recreate the preset in Logic! That and the fact that this does not have a proper stand-alone means I find it extremely limited.
The synth itself is wonderful. Too bad it suffers from usability issues.

### 5/5 — Very Good!

*2025-06-22, version 1.0.2*

I took my time before writing a review about Ivoks.
This synth is great. Like… really good! It’s my go-to for bassline, acid, etc.
Not to mention the scalable GUI. Chef’s kiss! 👌

### 5/5 — Optional Duophonic, PLEASE

*2025-02-04, version 1.0.2*

I love this company, this synth, this digital version. I would greatly welcome the return of the duophonic mode. I may be in the minority but it is much more raw and cool than four voice poly. The way the envelopes work in a Duo synth. Not the same as only playing two notes at a time on a poly.

### 2/5 — Interesting

*2024-12-28, version 1.0.2*

How do I change the background constant or heating? It’s doing our PGA our piggy arpeggios? how do I change the constant notes it’s doing! Is there a manual to turn it off and just get a single tone the standalone I know I’m a bit dim

## Frequently asked questions about RRS Ivoks

### What does RRS Ivoks do?

RRS Ivoks is an AUv3 instrument that emulates analog synthesizers. It provides a comprehensive set of tools for sound design, including oscillators, filters, amplifiers, and modulation sources, allowing users to create a wide range of electronic music sounds.

### How can I use RRS Ivoks?

To use RRS Ivoks, you need an AUv3-compatible host application such as GarageBand, Auria, AUM, or Cubasis. The app will then appear in the list of available Audio Unit instruments within your chosen host app.

### Is RRS Ivoks free to use?

RRS Ivoks offers a time-limited demo version with 5 minutes of free play time. To unlock unlimited use, an In-App Purchase is required to obtain the full, unlimited version of the instrument.

### What are the key features of RRS Ivoks?

Key features include analog emulation, undo/redo functionality, A/B comparison, upsampling options, macro controllers, a scalable GUI, dual oscillators with various waveforms, a versatile filter block, an amplifier block, and extensive modulation controls.

### Does RRS Ivoks support MIDI control?

Yes, RRS Ivoks has comprehensive MIDI CC implementation. This allows you to control various parameters of the synthesizer, such as oscillator settings, filter cutoff, envelope stages, and modulation levels, using external MIDI controllers or within your host app.

## Version history (last 5 releases)

### 2.0.1 — 2025-12-29

- Fixed parameters Automation bug.

If you like Ivoks synth, please support us by rating this app in the App Store!

### 2.0.0 — 2025-12-14

- Implemented Macro-Controllers feature;
- Implemented User Presets feature;
- Implemented SIMD optimization (experimental);
- Minor bug fixes and improvements.

### 1.0.2 — 2022-10-25

- Implemented MIDI CC chart.

### 1.0.1 — 2022-10-22

- Implemented GUI Scale on Pinch feature;
- Implemented 4-voices (POLY) mode instead of 2 (DUO);
- Fixed AD-mode Sustain/Release sound influence bug.

### 1.0.0 — 2022-10-09

No release notes.

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## More apps by RRS, OOO

- [EQ560](https://appshunter.io/ios/app/eq560/id1486125569)
- [EQ-A](https://appshunter.io/ios/app/eq-a/id1492043981)
- [EQ550](https://appshunter.io/ios/app/eq550/id1507132030)
- [EQ550b](https://appshunter.io/ios/app/eq550b/id1507176549)
- [PolyIvoks Filter](https://appshunter.io/ios/app/polyivoks-filter/id1507649629)
- [RRS EQ3](https://appshunter.io/ios/app/rrs-eq3/id1507895144)

All apps by RRS, OOO: https://appshunter.io/developer/1486125568

## Related topics

[analog synth](https://appshunter.io/ios/topics/analog-synth)

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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 2026-08-26.*