# Mass - MIDI Generator — Sequence. Modulate. Animate.

> Physics-based MIDI generator for creating evolving musical sequences and modulations. (iPhone/iPad app by Usable Creations.)

- Source: https://appshunter.io/ios/app/mass-midi-generator/id6498471263 (this page in markdown: same URL + `.md`)
- Developer: [Usable Creations](https://appshunter.io/developer/1718600235)
- Category: Music
- Price: $9.99 (on sale, was $14.99)
- Rating: 5.00/5 from 11 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 10 MB
- Languages: American English
- Released: 2024-11-15
- Data updated: 2026-09-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/mass-midi-generator/id6498471263/reviews.md

## What is Mass?

Open the door to new musical dimensions with Mass — a physics-based MIDI generator crafted to inspire musicians across genres. Add complexity to your sequences, explore generative patterns, or create organic modulations; Mass is your gateway to boundless musical experimentation.

• Generative Sequences: Sculpt intricate melodies and rhythms that evolve over time.

• Living Modulations: Shape fluid, natural modulations that respond like living elements.

• Total Creative Freedom: Need a spark of randomness or complete control? Mass lets you move seamlessly between guided automation and full improvisation.

Whether you’re diving into ambient soundscapes, exploring the depths of MIDI control, or crafting intricate modulations, Mass is your key to immersive sonic worlds. Available as a standalone MIDI generator and AUv3 plugin, Mass transforms your favorite hardware and software instruments into a sandbox of endless possibilities.


With Mass, you’ll find an extensive toolkit for creative control and experimentation. Here’s what you can expect:

• Euclidean Pattern Sequencing: Easily create complex sequences by layering polyrhythmic Euclidian patterns.

• Flexible MIDI CC: Modulate and sequence any MIDI CC parameter, allowing you to breathe life into every detail of your sound.

• Physics-Based Animation: Apply physics to sequences and modulations, creating dynamic, evolving movements within your music.

• Powerful Controller: Mass is a powerful MIDI controller, allowing you to manipulate your favorite hardware and software instruments in either standalone or AUv3 modes.

• MIDI Sync: Synchronize with external hardware and software using standard MIDI sync capabilities. Mass can function as the primary clock, or be synced to a host clock.

• iCloud Sync: Seamlessly share your creations across devices with iCloud syncing. Work in the standalone version or AUv3 plugin, without missing a beat.

With Mass, you’re free to explore musical layers, rhythms, and motion in new ways. Let it guide your creative journey, transforming each idea into a boundless musical experience.

## Key features

- Generative Sequences
- Living Modulations
- Euclidean Pattern Sequencing
- Flexible MIDI CC
- Physics-Based Animation
- Standalone & AUv3 Plugin
- MIDI Sync
- iCloud Sync

## Chart rankings

- #197 in Top Paid · Music (US App Store)

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/mass-midi-generator/id6498471263/reviews.md

### 5/5 — Excellent Random Midi Sequencer

*2026-05-28*

This is a really fun Midi instrument for $10. Even though there’s not a lot of presets, it is pretty easy to get started when you start poking around the interface. Once you’ve set your scale and done some minor tweaks, you can really get off to an interesting start for sequential pulse sequences. Once you feel confident there then you can start to explore some of the more random features using the built-in physics. You can really dive into some low-level config to create interesting polyrhythms. It took me a while to wrap my head around all of the details, but once you start playing, it becomes a lot more clear. Very happy with my purchase!

### 5/5 — Amazing Fun Wonderful

*2025-05-24*

This is a rare example of genius at work. The concept of this note/music/sonic ecosystem app is nothing short of amazing. 1st time non musician to highly experienced sound artist musician go as deep as you want or float it’s all amazing.

### 5/5 — A midi generator and sequencer like no other!

*2024-12-28*

A really interesting take on midi sequencing. Mass is a very clever put together app that does sequencing that just can’t be achieved by other sequencing apps. Has some unique and useful features and is a joy to use and explore.

**Developer response:** Thanks for the kind words, glad to hear you are enjoying it!

### 5/5 — Really awesome app!

*2024-11-24*

Took a chance on this app and I’m happy I did. Great for making controlled oscillation effects with its ability to out put x y coordinates as midi outputs. Can easily generate beautiful ambient soundscapes. Was able to use the midi outputs to create a rhythmic lofi oscillator that added some beautiful dynamics to my loops. Having the animations to go along with the sounds was a nice touch. Some things that I would love to see added is more physics models. Example. A bounce effect could be use to create side chase effects when sent to a volume controller. An ability to add density gradients to the xy plane could be used to have greater control over the midi outputs generation. This is a great app to have handy as a loop artist.

**Developer response:** Thanks so much for the review, and the suggestions!

## Frequently asked questions about Mass

### What is Mass - MIDI Generator?

Mass - MIDI Generator is a physics-based application designed to create complex and evolving MIDI sequences and modulations. It offers musicians a unique approach to generative music and sound design.

### What kind of musical patterns can I create with Mass?

You can sculpt intricate melodies and rhythms that evolve over time using generative sequences. It also features Euclidean Pattern Sequencing for easily creating complex, polyrhythmic patterns.

### Can Mass be used with other music software or hardware?

Yes, Mass can function as a powerful MIDI controller in standalone mode or as an AUv3 plugin. It supports MIDI Sync to synchronize with external hardware and software.

### How does Mass handle creative control?

Mass offers total creative freedom, allowing you to move seamlessly between guided automation and full improvisation. You can modulate and sequence any MIDI CC parameter to breathe life into your sound.

### What is the price of Mass - MIDI Generator?

Mass - MIDI Generator is available for a one-time purchase of $14.99.

### Does Mass - MIDI Generator have ads?

No, Mass - MIDI Generator does not contain advertisements. It is a paid application with no in-app purchases or ads.

### What devices is Mass - MIDI Generator compatible with?

Mass - MIDI Generator is compatible with iPhone and iPad devices.

### How often is Mass - MIDI Generator updated?

The latest version, 1.0.2, was released on January 26, 2026, indicating recent development activity. Users can expect ongoing support and potential future updates.

## Version history (last 5 releases)

### 1.0.4 — 2026-05-17

Fixed: Compositions were not always saving on new app installs

### 1.0.3 — 2026-04-29

- Improved: more reliable MIDI output with looping host transports
- Fixed: Pattern trigger events could occasionally drop
- Fixed: Pattern trigger events could occasionally duplicate

### 1.0.2 — 2026-01-26

- New: Composition-level velocity ranges. Adjust in Note Events (previously named Pitch) settings.
- New: Adds ability to duplicate a part. Select the duplicate (two circles) button at the top of the Part Editor.
- New: Adds ability to select "NONE" for axes in Control events, if no CC output for that axis is needed.
- Improved: Overhauled AUv3 MIDI code, improved performance and sample accuracy.
- Improved: Part Editor scrolling position stays when swiping between parts.
- Improved: Adds ability to navigate through Parts with arrow keys on connected keyboards.
- Improved: Cleaned up and improved misc Part Editor layouts.
- Fixed: Corrected link to user manual in Settings
- Fixed: misc issues with setting change messages in Part Editor.

### 1.0.1 — 2025-04-10

- Fixed: Triggered CC events didn't always send both X and Y values
- Fixed: Movement axis controls weren't usable on certain devices
- Improved: Better contrast for on/off state on movement axis controls
- Minor UI improvements

### 1.0.0 — 2024-11-15

No release notes.

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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 2026-09-01.*