# JAX Xcelsior Grand Piano — Virtual Sound Module & AUv3

> Virtual grand piano sound module and AUv3 for iOS and macOS. (iPhone/iPad app by Jens Guell.)

- Source: https://appshunter.io/ios/app/jax-xcelsior-grand-piano/id6446004793 (this page in markdown: same URL + `.md`)
- Developer: [Jens Guell](https://appshunter.io/developer/1195004865)
- Category: Music, Music, Entertainment
- Price: $12.99 (on sale, was $24.99)
- Rating: 3.50/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 246 MB
- Languages: English
- Released: 2023-05-14
- Data updated: 2026-06-20
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/jax-xcelsior-grand-piano/id6446004793/reviews.md

## What is JAX Xcelsior Grand Piano?

Please note, that you will get a cross platform relase for all Apple devices with ONE price this way!
You can use the apps and the audio units on a macOS (universal) and iOS (universal).

The manual of the JAX Concert Grands can be found here: https://midi.digitster.com/JAX%20Concert%20Grand%20Pianos/JAX%20Superior%20Grand.pdf
There are demo videos available here (macOS): https://youtu.be/81EOPP4Go40
or here (iOS): https://youtu.be/K_9PAnAZ5Vo

The JAX Xcelsior, one of our Concert Grand Piano Collection pianos is a virtual piano (sound module and audio unit) with a set of selected largest piano models.

The very special here is optimization for mobile devices, because it is using low resources while it delivers still better sonic qualities than gigabyte heavy sampled pianos, which mostly are not very well suted for mobile devices due to ther enormous usage of disk space and memory. A JAX Concert Grand will merely use around 50 to 100 MB of effective memory with a selected model.

For the series we developed some advanced features (i.e. simulation of string and body resonances) and took special care of expressivity without rasterized steps in the velocity of max. 128 possible values. An artefakt you often will hear with sampled pianos is velocity switching, because sampled velocity layers are usually insufficient for supporting the full dynamic range of a real piano.

The Superior was the very first release of more to come with this series: For instance our set of American style (Imperior) and Japanese style (Emporeor) Grand Concert Pianos, the Xcelsior (Largest Grands) and the Xperior (Selected Grands), which all have quite differend but well known sound characteristics. There are at least 4 different base models available with each of the releases plus a set of 16 hybrid models, which are fusions of the base models and all are selectable with just a touch for any performance. So all in all, there are 20 different timbres for instant selection availble with each of our Concert Grands (in sum 20 different, unique base timbres and their 16 fusion models ( = 100 !!! ).

The JAX Concert Grands mainly were created for performing classical music of all decades and Jazz and also come with its own integrated MIDI player, which is able to perform real MIDI recordings with sample accurate timing precision. Hundereds of such live played performances are included for enjoyment and audition, covering all famous piano componists of the last centuries. Each model has its own selection of MIDI files for random playing.

We specifically optimized the user interface for usage on the iPhone and the iPad.The macOS versions are identical to the iOS versions and optimized for the big Mac displays.

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

- MacOS (Catalyst)
- MacOS (Apple Silicon)
- iPadOS (iPads)
- iOS (iPhone)

The JAX Concert Grands feature different models of high quality virtual pianos.
JAX series releases are AudioUnits (AUv3). Audio units usually require a supporting host application for operation.
The main app also allows MIDI live connections for direct playing as a sound module.

## Key features

- Virtual grand piano sound module
- AUv3 support
- Optimized for low resource usage
- Advanced sound simulation
- Expressive dynamics
- Integrated MIDI player
- Cross-platform compatibility

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/jax-xcelsior-grand-piano/id6446004793/reviews.md

### 2/5 — Unable to get an enjoyable sound

*2023-11-25*

I tried everything I could on this app, but I eventually deleted it.  I just couldn’t get it to sound like a piano.  Hopefully this gets reworked and updated.

## Frequently asked questions about JAX Xcelsior Grand Piano

### What is JAX Xcelsior Grand Piano?

JAX Xcelsior Grand Piano is a virtual piano sound module and AudioUnit (AUv3) designed for Apple devices. It offers high-quality grand piano sounds optimized for mobile use, with advanced features and an integrated MIDI player.

### What devices is JAX Xcelsior Grand Piano available on?

This app is a universal release for all Apple devices. It is compatible with macOS (Catalyst and Apple Silicon), iPadOS, and iOS (iPhone).

### How much does JAX Xcelsior Grand Piano cost?

JAX Xcelsior Grand Piano is available for a one-time purchase price of $24.99. This price grants you access to the cross-platform release for all supported Apple devices.

### Does JAX Xcelsior Grand Piano have ads?

No, JAX Xcelsior Grand Piano does not contain advertisements. It is a premium application with no in-app purchases or ads.

### What kind of music is JAX Xcelsior Grand Piano best suited for?

The JAX Concert Grands, including the Xcelsior, were primarily created for performing classical music of all decades and Jazz. The integrated MIDI player also includes hundreds of live-played performances covering famous piano composers.

### How much memory does JAX Xcelsior Grand Piano use?

This virtual piano is optimized for mobile devices, using low resources. A selected model typically uses around 50 to 100 MB of effective memory, which is significantly less than gigabyte-heavy sampled pianos.

### Can I play MIDI files with JAX Xcelsior Grand Piano?

Yes, JAX Xcelsior Grand Piano comes with its own integrated MIDI player. This player is capable of performing real MIDI recordings with sample-accurate timing precision, and each model includes a selection of MIDI files for random playing.

### What is the age rating for JAX Xcelsior Grand Piano?

JAX Xcelsior Grand Piano has an age rating of 4+. This indicates it is suitable for users aged 4 and above.

## Version history (last 3 releases)

### 1.95 — 2024-03-10

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).

### 1.94 — 2023-05-15

version 1.94 (build 2238)

- we re-synthesized all spectral models
- optimized synthesis parameter adjustments
- fixing samplerate issues with some collections
- polyphony performance optimizations
- availability of the JAX Xcelsior Concert Grand collection
- reduced price for limited time across all collections

more information about this release can be found at our support website at
https://midi.digitster.com

### 1.92 — 2023-05-15

No release notes.

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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

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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 2026-06-20.*