# NuRack Auv3 FX Processor — Customizable Effect Racks

> Customizable AUv3 audio and MIDI effects processor with modular building blocks. (iPhone/iPad app by 4Pockets.com.)

- Source: https://appshunter.io/ios/app/nurack-auv3-fx-processor/id1520146960 (this page in markdown: same URL + `.md`)
- Developer: [4Pockets.com](https://appshunter.io/developer/370131860)
- Category: Music, Photo & Video
- Price: $12.99
- Rating: 4.70/5 from 42 App Store ratings · 32 written reviews indexed
- Age rating: 4+
- Requires: iOS 13 · 26 MB
- Languages: American English
- Released: 2020-06-26
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/nurack-auv3-fx-processor/id1520146960/reviews.md

## What is NuRack Auv3 FX Processor?

NuRack is an AUv3 based multi-channel audio and MIDI effects processor with a difference, it actually allows you to design your own custom effects using the 80+ building blocks provided. You have full control over routing which allows you to create complex audio paths in series or parallel. You can choose whether to use the stock interface or create your own custom interface using the built in Interface Builder which allows you to concentrate your audio components into a single customized effect.

NuRack can run in one of two modes. The first providing 3 customizable effects racks which can be switched (manually or via MIDI),  providing seemless switching (i.e. delay trails linger whilst another set of effects are faded in). The second mode allows you to route audio through 3 independent audio racks.

A generaous number of over 80 audio and midi building blocks are provided covering 12 different categories of effects. Here are just some of those included in NuRack:

Modulation Effects: Chorus, Flanger, Phaser, Tremolo, Vocal Doubler,  TalkBox, UniVibe, Leslie & Vocoder.

Time Based Effects: Stereo Delay, Tape Delay, Reverb and Reverse Delay.

Spectral Effects: Parametric EQ, Graphic EQ, PitchShift, Auto-Pan, Bit-Crusher, Tube Overdrive, Distortion, Harmony, Harmonic Exciter and SlowMo.

Dynamic Effects: VelocityControl, Compressor, Multi-Band Compressor, Noise Gate, Gate, and Limiter.

Filter Effects: MultiFilter, LP/HP Filter, Frequency Splitter, MultiBand Splitter, Classic Filters, Formant Filter, Ring Modulation and Shelf Filter.

MIDI Effects: MIDI Harmony, MIDI Velocity, MIDI Randomizer, MIDI Monitor, MIDI Mixer, MIDI Pads, MIDI Control, Strummer, MIDI Recorder, MIDI Modulation, MIDI Remap, CC Monitor,  CC Generator, PitchBend, MIDI Time Clock, and ChordToMidi.

Generator Modules: Noise, Audio Clip Launcher, SoundFont Player, Virtual Flute, Virtual Clarinet, Virtual Brass, FM Organ, FM Rhodes and Analog Sawtooth Synth.

Automation: TouchPad, AutoMate, Pattern Automation, and Visual LFO.

You also provide the ability to split and combine audio signal using splitters and mixer modules as well as a number of visual elements such as VU Meters, LED Meters, Scopes, Graphs etc.

Some effects such as phaser and flanger are usually controlled by an LFO, but this can be detached and automated remotely. There are a number of modules that allow auomation based on direct touch (X/Y Pads), Visual LFO, Pattern Automation, MIDI input (CC data), or peak/rms level detection. These automation modules can remotely control knobs and sliders throughout your rack.
 
Simply create a new rack and start adding modules to it. These modules are generally wired up automatically but these connections can be manually routed. Once you have your sound as you wish you can use it 'as is', or switch to Interface Builder mode where you can combine all your modules into a single interface. Elements can be dragged, dropped, resized and coloured as required. Add your own labels, image logos and custom backgrounds before saving your custom component.

Use the X/Y Pad to control your modulation effects by detaching their LFO's. Use MIDI CC data to automate knobs. Use the velocity of an incoming signal to control the cutoff/resonance of a filter (wah) or volume level of a gain control (swell),  as NuRack expands, so do the possibilities.

Features:

○ Over 80 categorised modules.
○ 3 Input / Output busses supported.
○ Audio & MIDI effect.
○ Lots of audio & MIDI automation options.
○ Seemless transition between racks.
○ Manual audio path routing.
○ Open in presentation mode (auto hides controls).
○ Interface Builder to customize your rack.
○ AUv3 plugin runs in MIDI and none MIDI mode.
○ Add your own Text/Heading and Image/Logos and backgrounds to your design.
○ Compatibility options for DAW's not supporting multi-channels.
○ Dark/Light Modes

Checkout the YouTube channel 'Paul the MusicMan' for demos and tutorials of NuRack.

## Key features

- Design custom effects racks
- Over 80 audio and MIDI building blocks
- Full routing control (series/parallel)
- Customizable interface builder
- Seamless effect switching
- 3 independent audio racks mode
- Extensive automation options

## Recent user reviews (10 of 32)

All indexed reviews: https://appshunter.io/ios/app/nurack-auv3-fx-processor/id1520146960/reviews.md

### 5/5 — 1 fx on App Store

*2025-06-21*

Preface: This app is potentially life changing..

Thank you for making this. An all in one fx rack that essentially replaces any others I use, save for a few specific ones. Minor learning curve (if you don’t watch any tutorials). Everything’s super self explanatory except for deleting modules and routing- still easy to figure out though..
The ability to customize makes effects freaks like me salivate 😌. Being able to split sound in so many ways: L / R, Frequency range, etc. gives you the power to manipulate sound to a degree that would blow the mind of a sound engineer of the past. 

I have two things I would like the crew that made this to see. 
1. I ask for one more time based effect. ¡A straight reverse reverb! I love the reverse delay, and use it alll the time, but often I just want the tail to be reversed and play at the same time. I have achieved something close to it playing with routing, blend, and the rev. delay + regular reverb, but it makes my brain tired.
2. Sometimes adding a module will just crash the whole rack, and sometimes other racks that are being used at the same time. I do have a slightly older iPhone, but it happens quite often. Especially with the reverse reverb. This phenomena and other random bugs that cause crashes can be frustrating. And SCARY too! Middle of the night, you’re making a lush and gentle ambient instrumental. All of a sudden you hear clicking and popping, feedback, and explosions in your ears at like 100db. Let me know if you’d like more on my feedback, I’d love to talk to developers about this amazing app. The crashing, and the crashing being physically painful sometimes is the only thing holding this back from 100% perfection. 

With that being said, I can’t ask for 100% perfection. Especially at the unbelievable price point. 

One of my favorite purchases of all time. 
The quality of sound, variety of features, customization, and usability is well worth the price. A multi effects vst for the pc on this level would be $300+. 

Huge thank you to the developers, from the bottom of my heart. As a broke 22yr old with a burning passion for music and sound..
I’m so blessed to be able to acquire top of the line tools and still be able to eat, pay rent, etc. 
Thank you thank you thank you!!!

P.S.:
My most used Preset I’ve made: 
Splitter: {Rev. Delay + Reverb}
{tape delay + harmonizer or vocal doubler} Send both to mixer, pan them hard in opposite directions. 
Not too crazy but it is a potent combo.

### 1/5 — Can’t removed placed modules

*2024-05-29*

Hope you don’t want to change any modules location or remove them after place, because it seems you can’t. Kinda breaks any utility for making complex patches as the individual modules are pretty shoddy. Unfortunately, not broken enough to be accepted for a return. Would be zero stars.

**Developer response:** To remove a module simply swipe down with two fingers and a popup will appear allowing you to remove the module. This is in the manual and in my YouTube videos. You can also double tap in the module header for more options, including save/load preset and remove module.

### 5/5 — This is very cool.

*2024-01-15*

Just starting out using the Ipad for music.  I had only the free effects available on the app store, scattered across different auv3's, and of questionable quality and/or abilities.  This app gives me every effect I could possibly need and the ability to customize these effects into a single rack, (or multiple racks in series and parallel).  ... And, man, can you customize.  It has a has a modular toolkit that lets you build all the effects you want, contained in a single effet slot.  Mr. Paul knocked it out of the park again.

### 5/5 — I wonder, ifPaul were IK Multimedia  , the cost would exceed thousands

*2023-12-03*

This is another super fantabulous gift from the hall of famer dev of the Ios. one of the most respected and remarkable developers, and boy did he do justice, hes gonna lay every other devs down.

if you don’t buy it, you’ll definitely depart much early from the production game.

Respect, 4pockets!

we love you!
yes we do

### 2/5 — Useless unless they move the “load/save” button from top left corner

*2023-10-13*

Your “app support” link goes nowhere. I am trying to use this in algoriddim djay app, but since plugins open in windowed mode there is a permanent bar along the top that covers the “load/save” menu button that you put at the very top. That means I can’t save in-djay configurations and can’t load configurations I make directly in your app.

If you move it down a little, or make a long press anywhere open the load/save menu, that would fix it. Unless you do that this effect is quite useless. 

Incidentally, it would be great to allow users to open any stand-alone effect they have already purchased instead of being limited to your built-in effects. I already have your multi-band compressor effect which is better than the one included here: I am basically just trying to add an equalizer on top of that. 

Thanks

### 5/5 — Fantastic

*2023-09-09*

Great possiblities

### 5/5 — Awesome

*2023-06-26*

I’ve meddled around with NuRack for months and I’ve still not scratched the surface. I watched a YouTube video by the legendary Jamie Mallender and purchased the app instantly. 
I have most of 4Pockets Paul’s apps because they are always top quality. And he’s a Yorkshireman like myself. 
If you want to build unique midi set ups to use in Aum, Cubasis and now Logic Pro. Look no further.

### 4/5 — Removing connections causes the app to crash

*2023-04-09*

Other than that I’m impressed

### 5/5 — Used in every one of my projects

*2022-03-20*

This app makes setting up efx so painless and keeps the Auv3 fx slots tidy and simple, setting up racks in just one instance per track where before there’d need to be a bunch of separate apps. Yet, it feels like it barely makes a dent in CPU. It’s got mostly everything, if not everything, one needs, fx wise and more, including a bunch of great MIDI tools. I love it and can’t do without at this point.

### 5/5 — Love this plugin

*2021-10-07*

I’m super pleased with the in-depth and extensive capabilities and creativity that comes with this!! It’s been working great however after iOS 15 update it seems to crash all the time … help? Any thoughts?

## Frequently asked questions about NuRack Auv3 FX Processor

### What is NuRack Auv3 FX Processor?

NuRack is an AUv3-based multi-channel audio and MIDI effects processor that allows users to design their own custom effects. It provides over 80 building blocks for creating complex audio paths in series or parallel, and offers a customizable interface builder.

### What kind of effects can I create with NuRack?

NuRack offers a wide range of building blocks categorized into Modulation, Time-Based, Spectral, Dynamic, Filter, and MIDI effects. You can also find Generator modules for synths and noise, as well as automation and visual elements like meters and scopes.

### How much does NuRack cost?

Based on the provided information, NuRack is a paid application. There are no mentions of free trials, subscriptions, or in-app purchases, indicating a one-time purchase model.

### What are the different modes of operation in NuRack?

NuRack can run in two modes. The first provides 3 customizable effects racks that can be switched seamlessly, allowing for features like delay trails to linger while new effects fade in. The second mode allows you to route audio through 3 independent audio racks.

### Can I customize the user interface in NuRack?

Yes, NuRack features a built-in Interface Builder. This allows you to combine all your chosen audio components into a single, customized effect interface. You can drag, drop, resize, and color elements, and add your own labels.

## Version history (last 5 releases)

### 1.52 — 2026-04-29

1.52 B74

Added a fix to prevent a crash when switching to Interfave Builder mode (with certain modules like strummer). The issue was caused by a function that silently failed in previous versions of iOS.

### 1.51 — 2025-08-30

1.51 B73

Fixed an issue where images added to your designs were not being restored if the app window was closed. This was due to a privacy/security feature added to iOS regarding not being able to access the pasteboard if the app window is in the background.

Added scene support for compatibility with future iOS versions.

### 1.50 — 2025-07-01

1.50
Added a fix for a crash when a host is fetching the selected preset on launch.

### 1.49 — 2024-02-09

1.49
Added the ability to access the soundfonts folder within NuRack using the Web Transfer function to delete and backup SF2 files etc.

### 1.48 — 2023-09-28

Fixes an issue on iOS17 where the effect selection menu appears empty.
Fixed scroll offset issue in menus when running on iOS17.

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

## Related topics

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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.*