# JAX CHROMATIC : Compander — (AudioUnit) Spectral Enhancer

> Real-time spectral dynamics processor for audio enhancement and mixing. (iPhone/iPad app by Jens Guell.)

- Source: https://appshunter.io/ios/app/jax-chromatic-compander/id1619225672 (this page in markdown: same URL + `.md`)
- Developer: [Jens Guell](https://appshunter.io/developer/1195004865)
- Category: Music, Productivity, Music
- Price: $12.99 (on sale, was $24.99)
- Rating: 4.86/5 from 7 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 23 MB
- Languages: English
- Released: 2023-01-28
- Data updated: 2026-06-22
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/jax-chromatic-compander/id1619225672/reviews.md

## What is JAX CHROMATIC?

This is an AudioUnit. AudioUnits (AUv3) require a supporting host application to perform. The main app distributes the embedded unit and allows for testing with random sound samples.

The complete manual can be found at: https://midi.digitster.com/CHROMATIC/JAX%20CHROMATIC%20Compander.pdf
There is also an introductory video available at: https://www.youtube.com/watch?v=TlEGn_npt4A

The JAX Chromatic Compander is an advanced real-time spectral dynamics processor, which splits the audio stream internally into 32 separate, stereophonic, chromatically tuned frequency bands. The parallel bandpass filter bank consists of fast response analog fiter models, producing natural fading sound with no latency. Chromatic means, that each bandpass is adjusted to cover 4 halftones in a musical scale (analog a classic 3rd octave). In difference to a 'Bark' filter, the chromatic bandpass filters are mapped consequently to the musical scale thru the entire frequency range.

A bi-directional stereophonic dynamics processor, based on the compander (a combination of an expander and a compressor), is attached to each of the 32 frequency bands and will perform spectral dynamics modification in time with specified attack and release values.

The JAX Chromatic Compander can be seen as a unique spectral enhancer, that is able to drastically improve the perception and presence of sound, especially removing all mud. It is mainly recommended to be used as a mastering processor, psycho acoustic loudnes maximizer and creative mixing tool for any kind of wideband audio signals (i.e. complete mixes and all sonically rich audio materials).

We use vector processing CPU registers on all supported platforms for keeping the performance as good as possible. There are in sum 64 filters, 64 companders and 64 input- and output mixers performing in parallel thousands of instructions for each single audio sample of the continuous input stream.

Usage, on the other side is extremely simple. All parameters are adjusted with ease by just moving fingers over the touchsreen. There is one macro knob for adjusting the compression/expansion amount. We spared out all complicated editing with numerical input and such, making JAX Chromatic Compander a joy to use.


Our latest builds are truly 'universal', meaning, the AudioUnit is available on:
- MacOS (Catalyst Intel)
- MacOS (Silicon M1/M2/M3...)
- iOS (iPhone)
- iPadOS (iPads)

Please note, that the MacOS Catalyst versions may be distributed or sold separately, because the AppStore does not allow to bundle none-silicon apps for the Mac with the iOS apps.
Our builds come with latest technology support for all Apple devices. We therefore always develop with currently actual frameworks and compilers.

## Key features

- 32-band spectral processing
- Real-time compander per band
- Analog filter models
- Latency-free operation
- Mastering and mixing tool
- User-friendly interface

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/jax-chromatic-compander/id1619225672/reviews.md

### 4/5 — Nice

*2024-03-11, version 1.4*

Tried it, liked it, bought it. The only thing I’d love is a way to more finely adjust the resonances for purposes of more easily controlling the decay of the resonant ringing when I use it for that purpose. It’s a little fiddly to adjust that narrow resonance range at the moment. For its more intended purposes it is perfectly straightforward and easy to use.

### 5/5 — User-friendly.  Amazing for adding clarity

*2023-04-01, version 1.4*

Using this on vocals, I found it was all I needed to get the sound to “pop” out. No need for EQ in my case. Really brilliant plug-in that keeps the complexity under the hood.

## Frequently asked questions about JAX CHROMATIC

### What is JAX CHROMATIC Compander?

JAX CHROMATIC Compander is an advanced real-time spectral dynamics processor that divides audio into 32 frequency bands for detailed sound modification. It's designed to enhance sound perception, remove muddiness, and serve as a creative mixing and mastering tool.

### How does JAX CHROMATIC Compander work?

It uses a parallel bandpass filter bank with fast-response analog filter models to split audio into 32 stereophonic, chromatically tuned bands. Each band features a bi-directional dynamics processor to modify spectral dynamics with specified attack and release times.

### Is JAX CHROMATIC Compander easy to use?

Yes, the app is designed for simplicity, with parameters adjusted easily via the touchscreen. It features a macro knob for compression/expansion amount, avoiding complex numerical input for a user-friendly experience.

### What devices is JAX CHROMATIC Compander available on?

JAX CHROMATIC Compander is a universal app available on macOS (Intel and Silicon), iOS (iPhone), and iPadOS. It supports a wide range of Apple devices, ensuring broad compatibility.

### What is the price of JAX CHROMATIC Compander?

JAX CHROMATIC Compander is a paid application, priced at $14.99. This one-time purchase grants access to its full suite of spectral processing features.

### How often is JAX CHROMATIC Compander updated?

The app was last updated on March 12, 2024, indicating active development and support. Updates ensure compatibility with the latest frameworks and compilers for optimal performance on Apple devices.

### Does JAX CHROMATIC Compander have ads?

No, JAX CHROMATIC Compander is ad-free. As a paid application, it provides an uninterrupted user experience without any advertisements.

### What is the user rating for JAX CHROMATIC Compander?

JAX CHROMATIC Compander has a high user rating of 4.9 stars based on 7 ratings. This suggests a very positive reception from its user base.

## Version history (last 2 releases)

### 1.6 — 2024-03-12

The product was updated for support of latest Apple technologies and frameworks.
Minimal iOS target is still 12.0. It also should work on the Vision Pro (in iOS compatibility app mode).

### 1.4 — 2023-01-29

No release notes.

## Apps similar to JAX CHROMATIC

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [PaSSBot](https://appshunter.io/ios/app/passbot/id1557720096) | 5.0 (8) | $34.99 | Music |
| [FAC Bandit](https://appshunter.io/ios/app/fac-bandit/id1458633968) | 5.0 (52) | $9.99 | Music |
| [FilterMorph AUv3 Audio Plugin](https://appshunter.io/ios/app/filtermorph-auv3-audio-plugin/id1446253681) | 4.2 (5) | $5.99 | Music |
| [MidiMixer for AUM Auv3 Plugin](https://appshunter.io/ios/app/midimixer-for-aum-auv3-plugin/id1542209150) | 4.7 (23) | $9.99 | 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

---

*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.*