Design sound from first principles.
W. Taylor Holliday, Audulus Developer

Audulus is a modular music processing app with unequaled ease of use.

( For iPad, iPhone, Mac, and Windows )
Audulus. Available now.
Buy for iPad & iPhone
iPad 2 / iPhone 4s or later required
Buy for Mac
Mid 2010 Mac or later required
Buy for Windows
Windows 7/8/8.1 64-bit, OpenGL 3.0+
Introductory Price!
The biggidy bomb coolest most super tech-nerd fun times soft synth I've bought in recent times!
Mac App Store Australia Review
Beautiful interface
Peter Kirn, Create Digital Music
Tweaker Heaven
Jordan Rudess, Dream Theater
It's the sound quality of the modules that really matters, and Audulus sounds fantastic.
Scot Salida,

Audulus Features

A node for every need

Audulus processing nodes are diverse, powerful, and easy to use, with no hidden controls.

Control everything with MIDI

Control Audulus with your MIDI controller keyboard or control surface.

Polyphonic processing

Process multiple voices. Have precise control of when voices are mixed into one.

Build new custom nodes

Group existing nodes to build new nodes. Reuse entire networks of nodes. Even define custom user interfaces for your nodes (requires in-app upgrade).

Modulate anything

Connections can be made to any knob so you can modulate any parameter. Nodes are optimized to handle extreme modulation.

Round-trip workflow

Begin a patch on your iPhone or iPad while on the go. iCloud automatically syncs it between your iPhone, iPad and Mac. (Mac/iOS only)

Live patching

Make connections while processing audio. Audulus will fade connection changes so you won't hear any pops or have sudden modulations.

A Plugin for your studio

Use Audulus inside Logic, Garage Band, Ableton Live, or Digital Performer. (Audio Unit on Mac, VST on Windows)

Multitouch interface for iPad/iPhone

Multitouch connection gestures. Pinch to zoom.



An advanced modular on a mobile platform.

Audulus for iPad/iPhone: Patch anything and everything. Anywhere.

Additional Features

  • Fluid Vector Interface - smooth animated interaction
  • 32-bit floating-point signal processing
  • Fully Enhanced for Retina Display (both iPad and Mac)
  • Unlimited Undo - full history stored in a patch
  • Virtual MIDI - control Audulus from your favorite MIDI app
  • Presets - quickly change between patch configurations (Mac Only)

Built-in modules

  • Virtual Analog Oscillator (4 classic waveforms)
  • ADSR Envelope
  • Noise Generator
  • Mathematical Modules: Add, Subtract, Multiply, Sine, Modulo
  • Random Number Generator
  • MIDI controlled Keyboard
  • MIDI assignable trigger
  • 16-Step Sequencer
  • Delay
  • Distortion
  • Low Pass Filter
  • High Pass Filter
  • 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
  • Input/Output
  • Polyphonic to Monophonic signal mixer
  • Global Time
  • Sub-Patch
  • Timer
  • Zero-crossing Counter
  • Audio Unit Plug-in (Mac Only)

In-App Purchase Upgrades

  • Custom Nodes - build your own module UI
  • Math expression module - 34 Math nodes in one
  • Timing mode - determine which nodes are using the most CPU
  • Switch pack - two nodes for signal routing, more to come
  • Poly pack - Stereo and Quadraphonic processing!
There's nothing else like it on iOS.
App Store USA Review
The app continues to amaze with great new features every version.
App Store Sweden Review
Beautifully thought out
App Store UK Review
I love the user community
App Store USA Review
This is my go-to modular synthesiser.
App Store UK Review
App Store Japan Review
... a great learning tool ... bought the Mac version as well.
App Store Australia Review


Affordable for Every Musician.

From students to hobbyists to accomplished pros.
Buy for iPad & iPhone
iPad 2 / iPhone 4s or later required
Buy for Mac
Mid 2010 Mac or later required
Buy for Windows
Windows 7/8/8.1, OpenGL 3.0+
Introductory Price!
Design sound from first principles.
W. Taylor Holliday, Audulus Developer