# System 2412

> Atonal chord progression generator for music composition and inspiration. (iPhone/iPad app by Ron Jarzombek.)

- Source: https://appshunter.io/ios/app/system-2412/id1551423140 (this page in markdown: same URL + `.md`)
- Developer: [Ron Jarzombek](https://appshunter.io/developer/568093008)
- Category: Music, Productivity, Music
- Price: $1.99
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 9.0 · 22 MB
- Languages: English
- Released: 2021-03-26
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/system-2412/id1551423140/reviews.md

## What is System 2412?

'System 2412' is a writing system app that creates atonal chord progressions by simply pressing a button. You can also create a progression from scratch, depending on what tonalities you want to hear and work with.

The app creates a progression consisting of 12 note groups made up of 3 notes each. All of the 12 note groups have their own time signature which can be adjusted from 1 to 16 beats per measure, and the tempo can be adjusted from 80 bpm to 400 bpm. 

After coming up with a progression, then record the audio from the app onto a DAW/multitracker and begin writing and recording. Use the notes in the note groups to construct riffs/melodies, practice soloing, write a melody on top of the progression, add drums, or use the progression however you want to get more ideas for writing and soloing.   

Since these progressions consist mostly of clusters rather than chords are using all 12 notes 3 times, don't expect to get common chord progressions, although occasionally you'll find a few instances. The point of this app is to create different soundscapes so that you can come up with wacky tonality shifts that may twist your ear at first,  and lead you into previously unknown musical territories that you probably wouldn't have come across without using a system like this. And it's even more fun if you just love working with notes!

To get a better idea of how to use the app, watch the tutorial at www.ronjarzombek.com/rjapptutorials.html

Take to a listen to the song 'We Have Controlled The Federation' which I wrote exclusively with progressions that I came up with using the 'System 2412' app...  

https://youtu.be/1x-fpDfqBnk

So if you're just tired of using the same old progressions that you've heard before and are looking for some new and creative  progressions to write with, or just want to work on your knowledge of theory and what scales work over certain sets of notes, this might be the app for you!...

'System 2412' app operation: 

There are 24 blocks on the top 2 rows, and 12 blocks on the bottom row. The notes on the top two rows either have a string sound, a keyboard sound, or can be muted. The notes on the bottom row have a string sound, and can be dropped two octaves for bass, and can be muted. Get whatever combination that you want... a single row, two rows or all three. 

If you don't like how a certain "note group" or "cluster" sounds, just take a note out and replace it with another note.

Tap (or hold and tap) each note for the correct enharmonic spelling.

You can start and stop anywhere in the middle of the progression, then restart by clicking below a note group, then press play. 

www.ronjarzombek.com

## Key features

- Generate atonal chord progressions
- Create progressions from scratch
- Customizable note groups (3 notes each)
- Adjustable time signatures (1-16 beats)
- Adjustable tempo (80-400 bpm)
- Explore unique soundscapes
- Inspire new musical ideas


## Frequently asked questions about System 2412

### How does System 2412 create chord progressions?

System 2412 generates atonal chord progressions by creating 12 note groups, each containing 3 notes. These progressions are designed to explore unique tonalities and soundscapes beyond common chord structures.

### Can I customize the progressions in System 2412?

Yes, you can create progressions from scratch by selecting desired tonalities. You can also adjust the time signature for each note group (1-16 beats) and the overall tempo (80-400 bpm).

### What kind of music can I create with System 2412?

This app is ideal for creating experimental music and exploring new sonic territories. The atonal nature of the progressions can lead to unique tonality shifts and inspire unconventional melodies and riffs.

### Does System 2412 have ads?

No, System 2412 does not contain advertisements. It is a paid application designed for a focused user experience.

### What devices is System 2412 compatible with?

System 2412 is available for iPhone, iPad, and iPod. It operates on iOS devices.

### How often is System 2412 updated?

System 2412 was last updated on March 26, 2021, with version 1.0. Information on future update frequency is not provided.

### What is the age rating for System 2412?

System 2412 has an age rating of 4+, making it suitable for a wide range of users interested in music creation.

### Where can I find tutorials for System 2412?

You can find tutorials on how to use System 2412 by visiting www.ronjarzombek.com/rjapptutorials.html.

## Version history (last 1 release)

### 1.0 — 2021-03-26

No release notes.

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## More apps by Ron Jarzombek

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- [Kill The Digital Distortion](https://appshunter.io/ios/app/kill-the-digital-distortion/id1467076557)
- [Create A Riff](https://appshunter.io/ios/app/create-a-riff/id1522109927)

All apps by Ron Jarzombek: https://appshunter.io/developer/568093008

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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.*