# ChaosArp — Chaotic MIDI arpeggiator

> Advanced MIDI arpeggiator and step sequencer for intricate musical pattern generation. (iPhone/iPad app by Axart Labs OU.)

- Source: https://appshunter.io/ios/app/chaosarp/id6497066359 (this page in markdown: same URL + `.md`)
- Developer: [Axart Labs OU](https://appshunter.io/developer/1814434331)
- Category: Music, Productivity, Music
- Price: $3.99 (on sale, was $7.99)
- Rating: 4.89/5 from 9 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 16 MB
- Released: 2024-06-13
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/chaosarp/id6497066359/reviews.md

## What is ChaosArp?

Introducing ChaosArp, the next-level MIDI arpeggiator/step sequencer designed to transform your musical ideas into intricate, dynamic patterns with a unique twist. ChaosArp is not just any arpeggiator; it's a powerhouse tool that uses the same advanced algorithms as LoAdKer to modulate pitch, rhythm, velocity, and duration, creating evolving, complex but high musical patterns that breathe life into your music.

Dive into the heart of your creativity with ChaosArp's innovative ‘rhythm event’ feature, which allows you to explore a variety of rhythmic modifications. From repeaters to stretchers and rests for extra space and emphasis—ChaosArp has it all. Each one of these rhythm events can be assigned to any of the 6 available slots, offering limitless possibilities.

Fine-tune your sonic exploration with the innovative ‘variance’ control - which goes one step beyond the simple ‘probability’ control that most arpeggiators have. Adjusting this setting for either pitch or rhythm (or both) will vary the character of the generated sequences, from fairly minimalistic to completely chaotic, thus opening up a world of endless variations. 

Elevate your music production today with ChaosArp and unleash patterns that inspire!

Features:

- Two modes: arpeggiator and stepper
- 1-16 steps
- Scale quantizer, never miss a note again!
- Variable rate, from 1/128 to 4 beats
- 3 arpeggiator modes (up, down, up/down)
- 3 stepper modes (forward, backward, ping-pong)
- 1 to 4 octaves range
- Latch mode
- Pitch randomizer with probability and variance control and random octave
- Rhythm event selector with probability and variance control
- 6 assignable rhythm event slots
- 13 rhythm event algorithms, including repeaters, stretchers, and rests
- Repeat, stretch, and repeat rest probability controls for further customization of the rhythm event algorithms
- Randomizable velocity and duration with variable range
- 4 performance buttons that temporarily override the probabilities of pitch, rhythm, velocity, and duration
- Automatable parameters

## Key features

- Arpeggiator and step sequencer modes
- Rhythm event feature with 13 algorithms
- Pitch and rhythm variance control
- Scale quantizer
- Randomizable velocity and duration
- 4 performance buttons

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/chaosarp/id6497066359/reviews.md

### 5/5 — Very peculiar

*2025-01-14, version 1.3.1*

A nice take on the arpeggiator concept. Try this at very low BPM.

### 5/5 — Better than your current arp

*2024-11-28*

So get it!

### 1/5 — No midi out

*2024-07-13, version 1.0.3*

It doesn't work, lights flah but no midi signal to an hardware synth. Meanwhile others two apps works fine. No setting, just channel.
Any solution?

### 4/5 — AUM?

*2024-07-13*

I see AUM in your little video blurb but cannot find it in AUM?

**Developer response:** Hi, you can find ChaosArp in AUM by first adding a MIDI track to your project and then opening the 'Audio Unit MIDI Processor' menu. ChaosArp should be visible on the list. If not, please contact us. 

WIth Best Wishes,
Achillefs
Axart Software

### 5/5 — Super dope midi tricks

*2024-06-24*

I love the idea of generative midi. This is quite nice, even on outboard gear! I think I ran this and Binarhythmic midi out to cat and edge. Amazing results, and not just random sounding. Sounds more intentional and focused once ya get the hang of it. cheers!

## Frequently asked questions about ChaosArp

### What is ChaosArp?

ChaosArp is a MIDI arpeggiator and step sequencer that generates complex, evolving musical patterns. It uses advanced algorithms to modulate pitch, rhythm, velocity, and duration, offering a unique approach to pattern creation.

### What makes ChaosArp's rhythm event feature unique?

ChaosArp's rhythm event feature allows for a variety of rhythmic modifications, including repeaters, stretchers, and rests, each assignable to 6 slots. This offers extensive control over the rhythmic character of generated sequences.

### How does ChaosArp's variance control differ from standard probability?

Variance control in ChaosArp goes beyond simple probability, allowing users to adjust the character of generated sequences from minimalistic to chaotic for both pitch and rhythm. This provides a deeper level of sonic exploration.

### What devices does ChaosArp support?

ChaosArp is supported on iPhone, iPad, and iPod. It is designed for iOS devices.

### What is the price of ChaosArp?

ChaosArp is available for a one-time purchase of $3.99. There are no in-app purchases or subscriptions required.

### How often is ChaosArp updated?

ChaosArp was last updated on May 22, 2025, indicating active development and support from the developer, Axart Labs OU.

### What is the age rating for ChaosArp?

ChaosArp has an age rating of 4+, making it suitable for a wide range of users interested in music creation.

### Does ChaosArp have ads?

No, ChaosArp does not contain advertisements. It is a paid application that offers an ad-free experience.

## Version history (last 5 releases)

### 1.3.2 — 2025-05-22

- Bug fixes and improvements

### 1.3.1 — 2024-11-24

- Fixed a bug that affected some of the stepper presets

### 1.3.0 — 2024-11-22

- Added 32 stepper presets (aka patterns), including melodies, bass lines and arpeggio lines
- Updated the app's icon (it was about time TBH)

### 1.2.1 — 2024-10-30

- Fixed a bug which could, under certain conditions, freeze or crash the app

### 1.2.0 — 2024-10-25

- Scale Quantizer with 15 scales to choose from
- Bug fixes and improvements

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## More apps by Axart Labs OU

- [LoAdKer](https://appshunter.io/ios/app/loadker/id782691053)
- [mLFO](https://appshunter.io/ios/app/mlfo/id1602306976)
- [mKer](https://appshunter.io/ios/app/mker/id1635296839)
- [Stop Music Timer](https://appshunter.io/ios/app/stop-music-timer/id6670235996)
- [Smooth Sleep](https://appshunter.io/ios/app/smooth-sleep/id6738882499)

All apps by Axart Labs OU: https://appshunter.io/developer/1814434331

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*