# JAX 3Stereo — 3Band Stereo Effect AudioUnit

> Audio unit for parametric stereo correction and modification across three frequency bands. (iPhone/iPad app by Jens Guell.)

- Source: https://appshunter.io/ios/app/jax-3stereo/id1529797194 (this page in markdown: same URL + `.md`)
- Developer: [Jens Guell](https://appshunter.io/developer/1195004865)
- Category: Music, Utilities, Music
- Price: $9.99 (on sale, was $14.99)
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 14.0 · 20 MB
- Languages: English
- Released: 2024-04-10
- Data updated: 2026-06-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/jax-3stereo/id1529797194/reviews.md

## What is JAX 3Stereo?

JAX 3Stereo will split the audio stream into 3 independent frequency bands and apply several kinds of parametric stereo correction and modification. The bandwidth for each frequency band is freely adjustable (also automate-able).  With this audio unit you will have complete control over the stereo image and you can apply frequency selective corrections and creative modifications. The goniometer display will give you great visual feedback.

AudioUnits (AUv3) require a supporting host application to perform. Our app is able to perform a demo with some embedded audio loops as a standallone host. By opening the main app ones, the audio unit will be registered for system wide usage with all supporting audio unit hosts.

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

- iOS (iPhone)
- iPadOS (iPads)
- macOS (Apple Silicon M1/2/3)
- visionOS (Apple Vision Pro)

Usage and look&feel is identical on all platforms.

## Key features

- 3 frequency band splitting
- Parametric stereo correction
- Adjustable bandwidth per band
- Automate-able parameters
- Goniometer display
- Universal app support (iOS, iPadOS, macOS, visionOS)


## Frequently asked questions about JAX 3Stereo

### What is JAX 3Stereo?

JAX 3Stereo is an AudioUnit (AUv3) that splits audio into three independent frequency bands. It allows for parametric stereo correction and modification on each band, offering detailed control over the stereo image.

### How much does JAX 3Stereo cost?

JAX 3Stereo is a paid application priced at $14.99. There are no in-app purchases or subscription fees associated with its use.

### What devices is JAX 3Stereo compatible with?

JAX 3Stereo is a universal app, meaning it is available on iOS (iPhone), iPadOS (iPads), macOS (Apple Silicon M1/2/3), and visionOS (Apple Vision Pro). It requires a supporting host application to function as an AudioUnit.

### How often is JAX 3Stereo updated?

The latest version, 3.76, was released on July 7, 2024. This indicates a recent update, suggesting ongoing development and support for the application.

### Does JAX 3Stereo have ads?

No, JAX 3Stereo does not contain advertisements. As a paid application, it offers an ad-free experience for its users.

### What is the age rating for JAX 3Stereo?

JAX 3Stereo has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content concerns.

### Can JAX 3Stereo be used offline?

As an AudioUnit, JAX 3Stereo requires a host application to run. While it can function within a DAW that supports offline processing, the app itself does not include standalone offline playback features beyond embedded demo loops.

### What is the user sentiment for JAX 3Stereo?

JAX 3Stereo has received overwhelmingly positive feedback, with an average rating of 5.0 stars from 4 ratings. This suggests users are highly satisfied with its functionality and performance.

## Version history (last 5 releases)

### 3.76 — 2024-07-07

update 3.76

- the stereo phase offset did not work correctly.
- the sample offset display was corrected

notes:
proper fine adjusting of sample offsets for one of the stereo channels with single band adjustment
can achieve wonders in bass and high frequency range. for instance popping out basses and create 'air'.
this parameter is not thought for dynamic automation. please always check mono combatibility of the results!

### 3.73 — 2024-06-12

Update version 3.73

- minor corrections of the preset file format (there was a wrong descriptor)
- re-adjustment of the frequency scale (now exponentially scaled)
  it visually makes more sense this way

NOTE: The lower the frequency, the narrower the stereo image should become.
High frequencies become more 'airy' with fairly wide adjustments.
Be rather careful with applying phase offsets (Haas effect).

### 3.72 — 2024-06-06

- state saving was corrected
- implemented factory preset folder with initialization states
  note: factory presets are now in resources and can no longer be deleted

### 3.71 — 2024-05-29

Update version 3.71

    - a problem was fixed, where preset saving was causing a crash
    - a problem was fixed, which prevented file naming for user presets
    - a problem was fixed, where a saved preset did not restore display contrast
    - the display contrast feature now can be automated and saved

    Notes:
    
    Rant start.
    
    1. If users actually would actively support developers by sending crash reports (automated by enabling in system preferences) many crashes and problems could be identified and fixed immediately, rather than letting the developer left in darkness and returning the apps for refunds without any hint of 'why?'. ^^
    
    2. Even countless public beta tests have shown, that the common interest is such kind is low and literally with NO feedback, that will be sent to the developer, making these TestFlight betas useless despite of the giant amount of work providing such betas.
    
    3. It would be an urgent recommendation, that Apple actually could generate a textual reason for a return/refund, rather than letting the developers die silently in darkness, without any chance for fixing something.
    
    4. We often see returning apps from users for absolutely minor issues, reasons that are in no way related to the entirety of main functions of the app. This trend is absolutely destructive and quite sad. For all involved parties, by the way.

    Rant stop.

### 3.7 — 2024-04-10

- we corrected a discovered issue with parameter automation (affecting some platforms)
- a new dialog for unified preset handling was implemented
- implemented code for autoloading into the distribution app for testing purposes
- minor (cosmetic) user interface corrections
- updated the embedded user manual

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## 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

[jax 3stereo](https://appshunter.io/ios/topics/jax-3stereo)

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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 2026-06-22.*