Mozaic Plugin Workshop 4+

Roll Your Own MIDI Plugins

Bram Bos

    • 5.0 • 72 Ratings
    • $4.99



Create your own MIDI plugins: MIDI filters, generative music tools, basic sequencers, MIDI control panels, chaos experiments... Let your imagination take you places.

Mozaic runs inside your favorite AU MIDI host, and gives you practical building blocks such as LFOs, pre-fab GUI layouts, musical scales, AUv3 support (with AU Parameters, transport events, tempo syncing, etc.), random generators and a super-simple yet powerful script language. Mozaic even offers quick access to your device’s Tilt Sensors for expressive interaction concepts!

The Mozaic Script language is designed from the ground up to be the easiest and most flexible MIDI language on iOS. A language by creatives, for creatives. You’ll only need to write a few lines of script to achieve impressive things - or to create that uber-specific thing that was missing from your MIDI setup.

Check out the Programming Manual on to learn about the script language and to get inspiration for awesome scripts of your own.

Mozaic comes with a sizable collection of tutorials and pre-made scripts which you can use out of the box, or which can be a starting point for your own plugin adventures.

Features in a nutshell:
- Easy to learn Mozaic Script language: easy to learn, easy to read
- Sample-accurate-everything: the tightest MIDI timing possible
- Built-in script editor with code-completion, syntax hints, etc.
- 5 immediately usable GUI layouts, with knobs, sliders, pads, etc.
- In-depth, helpful programming manual available on
- Easy access to LFOs, scales, MIDI I/O, AU parameters, timers
- Supports Sysex, with built-in checksum calculations
- AUv3; so you'll get multi-instance, state-saving, tempo sync and resource efficiency out of the box

Mozaic opens up the world of creative MIDI plugins to anyone willing to put in a few hours and a hot beverage or two.

Practical notes:
- Mozaic requires a plugin host with support for AUv3 MIDI plugins (AUM, ApeMatrix, Cubasis, Auria, Audiobus 3, etc.)
- The standalone mode of Mozaic lets you edit, test and export projects, but for MIDI connections you need to run it inside an AUv3 MIDI host
- MIDI is not sound; Mozaic on its own does not make noise... so bring your own synths, drum machines and other instruments!
- AUv3 MIDI requires iOS11 or higher

What’s New

Version 1.3.16

- Fixed a bug where using host count-in sometimes caused the first beat to be skipped
- Minor update to text view behavior

Ratings and Reviews

5.0 out of 5
72 Ratings

72 Ratings

Littldevil ,

Game Changer!!!

If you work with MIDI, you absolutely need this. I don’t usually write reviews for apps but I really felt compelled to do so here. The scripting language is not very difficult to learn and the documentation is remarkably easy to follow. There is a rather active user community and already tons of people have submitted plethora of work which is freely available for download.

Don’t even think about it... seriously this has to be the biggest bang for the buck on any app I’ve ever purchased in the App Store. Just get it, you cannot go wrong.

Woji52 ,

Bram, open a Patreon and you will have supporters.

I’m an idiot and a jerk for NOT leaving this high tier developer a review sooner. I’ve been into iOS music production for the last year or so. After playing only guitar and piano for half my life, I am now having the most fun I’ve ever had making music on iOS.

I had a question on Twitter about how to use the multi outs in Ruismaker (BUY IT) and Bram got back to me in minutes. It was a case of total user oversight. But the developer replied so quickly and so nicely.

If you’re on the fence and have some money. Please just purchase. We are spoiled rotten on iOS.

Support this developer. The apps get updated ALL of the time. Each one is so different and unique from the other. Each purchase is worth it.

Thank you for everything and thank you in advance for your continued work.


Hypnopad ,

Highly useful tool

This app made things possible on my iPad that were only possible on my laptop before. That’s a big step forward in the iOS music world.

App Privacy

The developer, Bram Bos, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

Rozeta Sequencer Suite
Gauss Field Looper
Ruismaker Noir

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