With Audulus, you can build synthesizers, design new sounds, or process audio. All with low latency real-time processing suitable for live performance. Audulus's user interface is clean, simple, and easy to learn, allowing you to focus on sound - now made easier than ever with nearly 100 built-in Eurorack-style modules.

▶ Winner of Electronic Musician Magazine Editor's Choice Award, 2017

"Audulus 3 out and is stunning!" - Richard Devine,
"Anybody into synthesis should check out Audulus on the iPad. Tweaker heaven." - Jordan Rudess
"Audulus is fantastic, a thinking man's synth." - UK App Store review
Rated "Killer App" on!

Praise for the Mac version:
"beautiful interface" - Peter Kirn,
"Love this App. It has one of the best UIs I've ever used." - USA Mac App Store review
"The biggidy bomb coolest most super tech-nerd fun times soft synth I've bought in recent times!" - Mac App Store Australia review
"Remarkable gesture control" -

▶ Visit the Audulus Forum for exciting FREE user-created patches! ◀

▶ Educational pricing available. For more information, see

▶ Key Features:

• Fluid Vector Interface - smooth animated interaction
• MIDI control - use your control surface or MIDI keyboard
• Polyphony - process multiple voices
• Diverse Nodes - from ADSR to ZeroCross
• Patch Browser - quickly flip through your patches
• 32-bit floating-point signal processing
• Fully Enhanced for Retina Display
• Unlimited Undo - full history stored in a patch
• Round-trip workflow with Audulus for Mac
• Virtual MIDI – control Audulus from your favorite MIDI app
• Audiobus support! - Runs as both an Input and Effect
• Sub-Patches - group and reuse nodes
• Universal Modulation - modulate any knob
• iCloud support - effortlessly sync patches between Mac and iPad
• Custom Nodes - build your own modules!
• Timing mode - figure out which nodes are using the most CPU!

▶ Featured Built-in Modules:

• 5ms Revolving Clock Divider
• Touch Feedback Clock
• Ms. Torsion Distortion
• Fibonacci Sequence
• Fab Five Rectifying LFO
• The Warpeggiator
• Scale Quantizer
• Cyclone Matrix Mixer
...and many more!

▶ Built-in Nodes:

• Virtual Analog Oscillator (4 classic waveforms)
• ADSR Envelope
• Noise Generator
• Mathematical Modules: Addition, Multiplication, Subtraction, Sine, Modulo
• Math expression module - 34 operation expression language
• Random Number Generator
• MIDI controlled Keyboard
• MIDI assignable trigger
• 16-Step Sequencer
• Delay
• Distortion
• Low Pass Filter
• Low Pass Filter with resonance
• High Pass Filter
• Feedback Delay
• Unit Delay
• DC Blocker
• Envelope Follower
• Pitch Shifter
• Constant Value
• Gain
• Mapper Curve
• Piecewise-linear Spline Curve
• Sample and Hold
• Crossfade
• 4-Channel Mixer
• Level Meter
• Value Meter
• Scrolling Waveform Meter
• Light
• RGB Light
• Input/Output
• Polyphonic to Monophonic signal mixer
• Polyphonic/Monophonic signal converters
• Multiplexer/Demultiplexers
• Sub-Patch
• Timer
• Zero-crossing Counter
• Text

▶ Recommended hardware: 4th Generation iPad or later. iPhone 5 or later.

Please don't hesitate to contact us at support at audulus dot com if you have any questions or need help.

What's New

Version 3.5.3

- Switch to Metal for drawing patches.

Ratings and Reviews

4.9 out of 5

47 Ratings

47 Ratings

Just Keeps Getting Better!


If you have every been interested in modular synthesis or electronic music creation, Audulus is the app for you. Far more than a “soft” synth, Audulus offers a rich visual programming environment for sound creation and manipulation. With a large selection of fundamental building blocks and a wide variety of prebuilt modules including example patches and full synths, Audulus allows you to create almost anything you can imagine. With multichannel IO support, MIDI, IAA and Audiobus compatibility, it can interoperate with other iOS music apps and with a suitable interface can also connect to more traditional hardware synthesizers. It’s available for iOS, macOS and Windows and patches can be shared between platforms. The 3.5 release features a new patch browser integrated with the iOS 11 Files app for simple patch management and sharing. The app has an active user forum where users can share ideas, patches, and assistance and there are several very good tutorials available on the forum to help get you started.

Developer Response

Thanks so much HammerDulcimer! Glad to see you're really getting the most out of Audulus - especially the forum :) We have so many great new updates coming along with 3.5, including lots of new patches that were developed first on the forum. Thanks again!

The best guitar FX app on IOS

Fidel Assthrow

I know this is geared toward modular synthesis, but you can build anything with this app. I have an old Maestro Echoplex tape delay that I'm always trying to replace with a more convenient pedal. All pedals out there are lacking in one degree or another but none of them replicate the distortion when you overload the input by leaning heavy on a volume pedal. Well, I was finally able to create that effect with Audulus. You can mix any sound to any other sound have it all controlled with a volume envelope. Distortions in Audulus sound as good as Bias FX and are far more flexible. All the basics are there to build any type of modulation, delay, reverb, way pedal, etc.

The only thing it's lacking for guitar is built-in guitar amp/cab modeling. I'm confident you CAN pull it off with Audulus if you know enough about how to get that sound. I use AUM to route Audulus to Bias amps and control it all with MidiDesigner. It's the best multi-FX unit I've had, completely customizable to my liking.

Audulus Perpetua!


This is some amazing software and I’m impressed by what you can do with it. I used to buy lots of different soft synths and effects on the App Store, but once you get to a certain level with Audulus, you don’t need (or covet :-) ) the others so much because you can make new sounds all the time. Or you can just sit back and have Mark B. and the geniuses on the forums develop new patches you can use. Either is great.
I’m late to the game on modular synthesis, but I’ve been a musician and software developer for quite a while. Audulus really appeals to my programming sensibility as well as my musical side so I’m using Audulus as a case study example of visual programming for some workflow software. Beautiful product, Taylor!

Developer Response

Thanks Somnambulist2! I'm glad you pointed out that people don't have to make modules totally on their own - they *can* come to the forum and ask for help, or even just describe something that they want built and we or usually another forum user will do it for you, as you said. We're happy that you're enjoying the deeper parts of Audulus, too - how it can really be a portal into programming in general. Thanks so much!


Audulus LLC
140.7 MB
Requires iOS 11.2 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2018 Audulus LLC


  • Family Sharing

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

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