Rozeta is a suite of MIDI sequencers and controllers that lets you explore a new, freeform approach to sequencing and controlling mobile music apps.

The app contains 10 MIDI Audio Units (a totally new feature in iOS11) in a single package, which can be loaded in compatible MIDI AU hosts (AUM, Cubasis 2, ApeMatrix, Sequencism).

1) Rozeta Bassline: a monosequencer based on the popular Troublemaker sequencer. Obviously comes with all the randomization and mutation features. Up to 8 patterns per sequence, with Follow Actions. Transpose using MIDI.

2) Rozeta Rhythm: a euclidean drum sequencer with mutations per instrument and polyrhythms. Comes with configurable key mappings for many popular drum apps.

3) Rozeta X0X: classic TR-styles step sequencer for drum machines. Supports triplets, polyrhythms and mutations per channel. Optionally emulates the exact timing jitter pattern of the legendary TR-808

4) Rozeta LFO: a triple MIDI LFO generator lets you modulate CC parameters of your MIDI instruments. Apply amplitude modulation to each wave for more organic behavior. Optionally syncs to tempo.

5) Rozeta XY: a double XY Controller Pad for generating 4 simultaneous configurable CC controller streams per instance. Also features MOD wheel and PitchBend sliders.

6) Rozeta Arpeggio: adds a MIDI arpeggiator to any of your synths. Offers latch mode, shuffle and automatic tempo synchronization. Turn any incoming MIDI stream into an arpeggio on the fly.

7) Rozeta Particles: MIDI particle generator - generates a cloud of MIDI notes that create pseudo-random patterns when bounding off the walls.

8) Rozeta Cells: Polyphonic Step Recorder - record and play back polyphonic phrases and patterns.

9) Rozeta Collider: MIDI Hadron Collider - explore semi-repeating generative patterns and melodies.

10) Rozeta Scaler (NEW): MIDI Scale Quantizer and Transposer - tune incoming MIDI to a different scale, never play out of tune again.

- these plugins do not run as a standalone app and require a compatible host to work
- MIDI is not sound. To make sound you'll have to feed the MIDI into a synthesizer or instrument app. Bring your own synths!

What’s New

Version 1.3.4

Fixed an issue that could cause plugins to stop functioning when using "MIDI pass through" and overloading them with MIDI input.

Ratings and Reviews

4.7 out of 5
106 Ratings

106 Ratings

Mcjul ,

A great tool for music makers!

This is my second favorite ios music app (after Gadget). I have too many apps to name but this one gets used the most. Using this with AUM is an easy and fun way to make music, and the other apps by Bram Bos work together with this well. Other developers apps also work easily, i like using collider or particles with Imini or Isem for a great background bed of music. Funkbox with Xox is another great combo. The best part is the developer has added new features free of charge.

Jtsistinas ,

The sequencer is awesome, but audio unit only is a problem

I bought this pack of sequencers because I love how it was done in their drum synths. While Im impressed with all the musical possibilities this unlocks, my biggest concern is the choice to only support this app as an audio unit plugin. I wont go into the awful DAW options out there, the lack of decent apps that support sequencer AUs or the painful process of trying to get them to work right and fit into my workflow. Ill just simply state that if this app had the option of being used full screen with midi out (similar to the drum synths) I would give it 5 stars no questions asked.

Wilhelm Scream! ,


Without exaggeration, much of the love I have for creating music on my iPad stems from these amazing apps. From the moment I launched this suite in AUM, I was using it to create sounds and tracks. They are easy to use once you get the swing, and they have depth.

Bram Bos is a genius.

Thank you for making these apps!


Bram Bos
3.6 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.

More By This Developer

You May Also Like