NuRack is an AUv3 based multi-channel audio effects processor with a difference, it actually allows you to design your own custom effects using the 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 audio building blocks are provided covering 6 different categories of effects. These include Chorus, Flanger, Phaser, Leslie, Tremolo, Voice Doubler, Stereo Delay, Tape Delay, Reverse Delay, Reverb, Parametric EQ, Graphic EQ, Pitch Shift, AutoPan, Bit Crusher, Tube Overdrive, Distortion, Velocity Control, Compressor (sidechain), Noise Gate, Gate/Gapper, Multi-Filter, LP/HP Filter, Frequency Splitter, Classic Filters, XY TouchPad, AutoMate, MIDIControl, Pattern Automate, VU Meters, Vintage Meters, LED Meters, Spectrum Analyser, Light Object, Scope, Splitter, Mixer, Gain, Gate, UnivVibe, TalkBox Ring Modulation, Harmony, NumtiBand Compressor, Multaiband Splitter, 3:1 Merge, Visual LFO, Noise Generator and Hard Limiter.

We 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. We have a number of modules that allow auomation based on direct touch (X/Y Pads), 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 and image logos 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.


○ 48 categorised modules.
○ 3 Input / Output busses supported.
○ Multiple 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 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.

What’s New

Version 1.14

Added an option to convert knobs into faders in interface builder.
Added a new Low/high Shelf Filters module.
Added new 'Generators' and 'Instruments' categories for future expansion.
Added a couple of experimental instruments which are intended to be used as carriers for TalkBox and other apps that require input.
Modified the LP/HP filter module to display actual frequencies.
Added a new option to Settings to enable rack switching using MIDI. This option is now off by default.
Fixed an issue which caused modules to be positioned outside the left rack boundary in interface builder.
Fixed an issue where knob values in interface builder differed from connection mode.
Other minor bug fixes.

Ratings and Reviews

4.8 out of 5
12 Ratings

12 Ratings

Cenk ,

It's as incredible as it looks

It's a brilliant idea, and it's very easy to learn how to use it. Design your own interface, and put all of your FX in one window, along with XY pads to modulate them. It's also great for cutting down on CPU usage, because you can use one app instead of many.

Developer Response ,

Thanks for the kind words, and many more modules and playthings will be added over the coming weeks.

itAniMulliK ,

Great app

I only own a few apps from this developer ”shimmer, analyzer, and this app which is a no brained must buy. I am very impressed with the apps I do own. Not to mention this apps gets constant updates with new features... can’t beat that!

TheRealDutchee ,

Super cool and lots of fun!

Real nice job, Paul. Indeed not too complicated to figure out for a novice and a lot of fun to experiment around with making your own effect racks and customizing its looks.

Really great stuff and definitely getting even better with every update. Thanks, kudos and five stars!

Developer Response ,

Yes, I have already considered being able to change background textures. The only reason I haven't done that yet is because I'm still busy adding content, but it will happen.


Limelight Software
34.6 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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