# JAX - Walking On A Rainbow — The Musical Frequency Analyzer

> The Musical Frequency Analyzer (iPhone/iPad app by Jens Guell.)

- Source: https://appshunter.io/ios/app/jax-walking-on-a-rainbow/id6774770508 (this page in markdown: same URL + `.md`)
- Developer: [Jens Guell](https://appshunter.io/developer/1195004865)
- Category: Music, Productivity
- Price: $9.99
- Age rating: 4+
- Requires: iOS 17.6 · 128 MB
- Languages: American English
- Released: 2026-06-11
- Data updated: 2026-06-25
- User reviews in markdown: https://appshunter.io/ios/app/jax-walking-on-a-rainbow/id6774770508/reviews.md

## What is JAX?

Introduction price is available for a short time.

We have harnessed Apple’s cutting-edge hardware and native programming frameworks to create an Audio Unit that is truly unparalleled. From floating-point vector registers and Metal Performance Shaders to shared memory between the Audio DSP kernel and the GPU...

However — since all of this might sound a bit too technical — we didn't simply use these technologies as a means to an end; instead, we wrapped them in a musically meaningful and beautiful concept.

JAX 'Walking On A Rainbow' is our answer to classic frequency analysis tools — featuring a consistently musical implementation designed for real-time processing, imbued with a certain imaginative charm.

The songs we composed specifically for this purpose serve to underscore this very concept:

	‘Open your mind and you'll find it's like magic.
	When you take a step.
	Oh
	I'm walking on a rainbow.
	Walking on a rainbow!’

WE ARE FRONTIERS.
You can expect more to cone and - you are welcome to join us.


Technical Note: The AudioUnit is smaller than 8 MB and consumes less than 1% of CPU power on an Apple M4 chip. No bloated third-party frameworks were used; this is a native development aligned as closely as possible with Apple's latest hardware (silicon).

The manual is available on our website at: 
https://audio.digitster.com/wp-content/uploads/2026/05/JAX-Walking-On-A-Rainbow.pdf


## Version history (last 1 release)

### 1.86 — 2026-06-11

No release notes.

## 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

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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 2026-06-25.*