# JAX MIDI ModulePlayer — Sound Module and MIDI Player

> GM/GS compatible multi-timbre synthesizer and MIDI file player. (iPhone/iPad app by Jens Guell.)

- Source: https://appshunter.io/ios/app/jax-midi-moduleplayer/id1628626015 (this page in markdown: same URL + `.md`)
- Developer: [Jens Guell](https://appshunter.io/developer/1195004865)
- Category: Music, Music, Entertainment
- Price: $29.99
- Rating: 4.20/5 from 5 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 24 MB
- Languages: English
- Released: 2023-02-19
- Data updated: 2026-06-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/jax-midi-moduleplayer/id1628626015/reviews.md

## What is JAX MIDI ModulePlayer?

There is a manual at: https://midi.digitster.com/JAX%20MIDI/JAX%20MIDI%20ModulePlayer.pdf
And a demonstration video at: https://youtu.be/DKwRxcfgy8s

JAX MIDI Module & Player can be used as a GM/GS (General MIDI) compatible multi-timbre synthesizer for playing live or as a file player. It is usable as a sound module for external MIDI signals and as audio unit for usage in any host application, which supports Apples AUv3 format.

With JAX MIDI Module & Player you can load available standard MIDI files and just play them back. It has inbuilt a fully featured GM/GS synthesizer with over 370 different instruments and drum sets, which is also playable in realtime on 16 MIDI channels simultaneously.

The module works like the classic external hardware modules of the late 90s. If used as an audio unit, the MIDI stream is passed thru, so that other apps (like synthesizers and drum machines) can profit from the file playback. Internal sound generation can muted with the main volume slider.

Important GM MIDI controllers are supported and also displayed for overview. The playing state of all channels is displayed in realtime.

For JAX MIDI Module & Player, you may create your own MIDI files with notes with any external MIDI editor that can create standard MIDI files format 0 or 1, with controllers and tempo changes and all and then play back thru it with the internal or any external instrumentation.

AudioUnits (AUv3) require a supporting host application to perform. But our app is able to perform as a standalone host for the embedded unit and provide basic Core MIDI functionality for communicating outside the sandbox.

This build is truly 'universal', meaning, the unit is available for:

- MacOS (Silicon M1)
- iOS (iPhone)
- iPadOS (iPads)

Note: We now will separate the native macOS release (Mac Catalyst) from the iOS universal release, because native macOS releases need special optimizations. There also will be different prices for the native macOS apps.

Making AUv3 technology available across all devices (for usage with GarageBand, Logic Pro X, MainStage 3 on the Mac), is quite a challenge.
And we have chosen to deliver the releases across all devices instead of asking multiple times for money.

Our builds come with latest technology support for all Apple devices (at the point of release). We therefore always develop with latest Apple frameworks and compilers. But we try to keep the compatibility at minimum requirements as far as even possible. Especially the latest M1/2/3 and cross platform optimizations forced us to drop all the legacy device support (below iOS 14). This is also true for all our older apps, which will be updated step by step to reflect the latest technologies.

## Key features

- GM/GS compatible synthesizer
- Plays standard MIDI files
- Over 370 instruments and drum sets
- 16 MIDI channels simultaneously
- Audio Unit (AUv3) support
- Standalone host functionality
- Universal app for Apple devices

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/jax-midi-moduleplayer/id1628626015/reviews.md

### 2/5 — Frustrated.

*2024-04-05*

I purchased this thinking that it acts like a Roland Sound Module, but I cant get it to work on Sweet Midi Player.. Is there a work around for this?

### 4/5 — Buggy out of the Gate

*2023-02-22*

The UI does not show up completely on my IPad. I managed to navigate by memorizing the controls shown in demo videos but they do not show up either in standalone nor when used as an AU. I also attempted to navigate to a folder on my IPad where I have a lot of MIDI files stored but Files integration does not appear to be supported.

Update: The developer was very responsive. He immediately responded to the reported problems and submitted an update to correct the problems! I have updated my rating and will support this developer. This app. is now one of my Go- to apps:)

**Developer response:** At first, there is complete iOS / macOS file integration supported. So this traces down to a “user operation error” obviously. Second, there was a background issue with the transparency, which made the user interface particularly invisible on systems with light appearance switched on. However this was solved the next day. We wished you would actually correct your unpolitical review a bit and possibly next time contact us for resolving jour problems with more satisfaction.

## Frequently asked questions about JAX MIDI ModulePlayer

### What is JAX MIDI ModulePlayer?

JAX MIDI ModulePlayer is a General MIDI compatible multi-timbre synthesizer and file player. It can function as a sound module for external MIDI signals or as an audio unit within compatible host applications.

### What devices does JAX MIDI ModulePlayer support?

JAX MIDI ModulePlayer is a universal app and is available for macOS (Silicon M1), iOS (iPhone), and iPadOS (iPads). It requires iOS 14 or later.

### How much does JAX MIDI ModulePlayer cost?

JAX MIDI ModulePlayer is a paid application priced at $14.99. The developer offers releases across all devices to avoid multiple purchases.

### Does JAX MIDI ModulePlayer have ads?

No, JAX MIDI ModulePlayer does not contain advertisements. It is a paid application.

### Can I create my own MIDI files for JAX MIDI ModulePlayer?

Yes, you can create your own MIDI files with notes, controllers, and tempo changes using any external MIDI editor that supports standard MIDI file format 0 or 1. These files can then be played back through JAX MIDI ModulePlayer.

### What is the update frequency for JAX MIDI ModulePlayer?

The app was last updated on March 3, 2024, with version 2.6. The developer aims to keep compatibility with the latest Apple frameworks and compilers, updating older apps step by step.

### What is the age rating for JAX MIDI ModulePlayer?

JAX MIDI ModulePlayer has an age rating of 4+. This indicates it is suitable for a wide range of users.

### How does JAX MIDI ModulePlayer compare to hardware modules?

JAX MIDI ModulePlayer works similarly to classic external hardware modules from the late 90s. It provides a fully featured GM/GS synthesizer and can be used as a sound module for external MIDI signals.

## Version history (last 3 releases)

### 2.6 — 2024-03-03

The product was recompiled with Apples latest compilers and frameworks. Please note that we switched our development tools to latest releases ( everything is consequently arm64 (M1, 2, 3) now ). Therefore we will no longer keep and test availability on Apples legacy Intel architectures. Apples Intel architecture support will get deprecated in near future. 
The app should now also be ready for the Apple Vision Pro in iOS compatibility mode. Due to a missing feature, the simulator fails to register embedded AudioUnits (AUv3) correctly, which makes testing impossible.

### 2.5 — 2023-02-21

urgent update 2.5 (build 1196)

fixed:
- background transparency issue solved (the unit was particularly invisible if the system background color was switched to light appearance), this applied to all platforms
- CPU hit problems on some iOS devices reduced (obviously the high graphics update rate produced unwanted CPU hit)
- no longer loading a random file at startup (auto jukebox function removed)
- the loaded file now will reload and loop after finishing until stopped
- removed some not required extra effect processors from the main app
- added the GM/GS program list to the manual

unresolved:
- there was a strange crashing issue on the macOS 12.5 reported, which occured after the audio unit was loaded with another host. this could not be reconstructed nor solved yet.

roadmap:

 - we want to extend the factory set of MIDI Collection files
 - we want to bring back the unique contrast feature, which most of our apps have
 - we want to implemet alternative sound banks for the synthesizer
 - we want to implement MCC (media control center) remote control on all platforms
 - we want to bring back the jukebox function with as an option

### 2.4 — 2023-02-20

No release notes.

## Apps similar to JAX MIDI ModulePlayer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Fusion by FloVerse](https://appshunter.io/ios/app/fusion-by-floverse/id6446180299) | — | $2.99 | Music |

## More apps by Jens Guell

- [GM MIDI Player](https://appshunter.io/ios/app/gm-midi-player/id1445780869)
- [MIDI SWEET : Clock Sync (AU)](https://appshunter.io/ios/app/midi-sweet-clock-sync-au/id1454284852)
- [JAF Model One](https://appshunter.io/ios/app/jaf-model-one/id1472652593)
- [JAF Collection](https://appshunter.io/ios/app/jaf-collection/id1472896422)
- [JAX Stereo Tool (AU)](https://appshunter.io/ios/app/jax-stereo-tool-au/id1473390302)
- [JAX !Make Louder (Audio Unit)](https://appshunter.io/ios/app/jax-make-louder-audio-unit/id1474614677)

All apps by Jens Guell: https://appshunter.io/developer/1195004865

## Related topics

[musk midi player](https://appshunter.io/ios/topics/musk-midi-player)

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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 2026-06-23.*