Audulus Modular Synthesis App For iPad Now Available

Developer Taylor Holliday has released Audulus, a modular synthesis app, for the iPad. Audulus was released previously as a Mac OS X app.

With Audulus, you can build synthesizers, design new sounds, or process audio, with low latency real-time processing, suitable for live performance. Audulus’s user interface is designed to be easy to learn, allowing you to focus on sound.

Here are the details:

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

Built-in Modules:

  • Virtual Analog Oscillator (4 classic waveforms)
  • ADSR Envelope
  • Noise Generator
  • Mathematical Modules: Addition, Multiplication, Subtraction, Sine, Modulo
  • Random Number Generator
  • MIDI controlled Keyboard
  • MIDI assignable trigger
  • 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


  • Presets – quickly change between patch configurations
  • Unlimited History – every undo is stored in the file
  • Encapsulation – group nodes into sub-patches
  • Audio Copy / Paste
  • Audiobus support
  • iCloud support

Audulus is $9.99 in the App Store.

If you’ve tried Audulus, let us know what you think of it.

19 thoughts on “Audulus Modular Synthesis App For iPad Now Available

  1. Just curious, but why is iOS6 required? That kills us first gen iPad owners. I get that it’s an older OS but there are supported apps that have a lot more going on, is there no work around for buffer issues? But on the other side of that I will be eagerly awaiting an iPhone version, as long as my 4s can handle it…

    1. I used one feature from iOS 6 which cut my development time significantly (it helped me build the patch browser quickly). I might re-implement that feature myself for iOS 5 compatibility, but no guarantees. I’m also concerned about performance on iPad 1. In particular, Audulus uses the GPU a lot more than most synths.

      – Taylor

          1. If one tries to buy an unsupported app from their iPhone or iPad it won’t allow it. Buying from iTunes does not have the same restriction. It will let you buy any app regardless of what devices you may own. (And really, that’s how it should work)

  2. Amazing app, I bought it, love it (mini Reactor!!) left glowing 5star feedback on App Store, don’t do that very often!

  3. This app has matured well on the Mac so it’s great to finally see it on the iPad it’s almost exactly the same on the iPad and you can share patches between the two. It works well, sounds great, and has a much more straight forward interface than Jasuto. Once Taylor gets Audiobus and copy/paste added this will be killer.

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