Mersenne is a melodic percussion synthesizer that combines two FM synthesis modules, a noise generator and a resonator. With simple operation, you can easily create a clear bell sound with complex attack sound.

## What's New in Version 2
- Universal App : Optimized for iPad and iPhone
- Audio Unit Extensions (AUv3) compatible
- Support for Audiobus State Saving
- Exporting and importing of presets via Share extensions
- Add Swing parameter to the arpeggiator
- Improved MIDI mapping function
- Support for Bluetooth MIDI Devices
- Add Grain and Attack parameters to the Noise

## Synthesizer Engine
* Tone A/B: FM Synthesis
* Noise + Filter
* Resonator
* Chorus
* Delay
* Reverb

## Key Features
* Universal App
Optimized for both the iPad and the iPhone.

* Audio Unit Extensions (AUv3)
You can use in a host application that supports Audio Unit such as GarageBand.

* Inter-App Audio
You can stream live audio directly to other Inter-App Audio host applications.

* Audiobus support
You can stream live audio directly to other Audiobus-compatible apps. See for more information.

* Ableton Link
Ableton Link is a new technology that synchronizes beat, phase and tempo of Ableton Live and Link-enabled iOS apps over a wireless network. See for more information.

- Core MIDI, Bluetooth MIDI, Virtual MIDI, Inter-App Audio MIDI input
- MIDI Clock synchronization
- MIDI Controller Mapping

* Programmable Arpeggiator
You can easily create your own pattern.

What's New

Version 2.1.2

- Improved stability when starting up as AUv3

Customer Reviews

Great synth!


One of my favorite iOS synths. Being able to import third party sounds, along with the included great sounds, really sets this apart from other iOS offerings. The best part of this synth, however, is how responsiveness of the developer! Bugs are squashed very quickly with timely updates. Must buy!

Wonderful and unique


I like how this FM+Resonator synth focuses on a particular sound. It sounds a lot like some of the instruments in a Gamelan ensemble. When combined with the arpeggiator and delay it's easy and fun to compose a sort of modern synthesized version of a Gamelan. That's mainly what I use it for, and because I have an affection for Gamelan music, this synth brings a smile to my face when working with it.

Mersenne's MIDI implementation is excellent. The controls are very functional and easy to use. The two Tone generators, the Noise generator, Resonator, drive and delay, chorus and reverb are logically laid out and instantly useable. The arpeggiator is especially powerful, letting you design your own patterns for saving and recalling. The minimalistic elegance in Mersenne's design is apparent and well suited to the sounds this synth produces. The single-mindedness of Mersenne's sound is very much a plus in this case.

Because Mersenne is so good at getting that Gamelan type sound, including different tuning systems, especially Far East tunings would be an excellent addition to this synth and would qualify it for a legitimate 5 star rating. I can manipulate the detuning, glide and other parameters to get a slightly faux eastern sound, but that's not the same as an authentic Gamelan tuning.

Overall one of the best and most enjoyable synths of 2016.

Cool sounds/functionality; a bit niche


I'm a big fan of the other synths from this company (particularly Cassini). This one is solid and well-implemented with AudioBus, IAA, etc. But I did feel that the "bell"-like sounds were a bit same-ish and limited in their usefulness in music making. That may be a bit unfair, since it's basically intended as a niche product, but it's tough for workflow to have a separate app that might do supplementary noises without also being able to handle more traditional bass and lead sounds. For example, I feel like an app such as Thor or FM4 could do a lot of what this app does, plus a lot more. That said, it's affordable, small, and the sounds that are there are very decent. 4 stars.


iceWorks, Inc.
10.8 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© iceGear


  • Family Sharing

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

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