ArrangerXV1 Register interest
The countdown to playTarget launch · Saturday 7 November 2026 -- DAYS --:--:--

In development · Target launch Saturday 7 November 2026

The arranger keyboard experience.
Without the arranger keyboard price.

Play your MIDI keyboard with a full accompaniment behind you. Familiar arranger controls, your choice of sounds and styles, and the freedom to enjoy the performance.

Planned price: £99 One-time purchase · No subscription
Register your interest See what makes it different
ArrangerX development preview
Current ArrangerX V1 performance interface running on Windows
Latest News

An exciting development

Bringing generations of arranger styles together.

ArrangerX is working with a long-established British specialist in arranger keyboard software, whose extensive catalogue is believed to be among the largest of its kind in the world.

With decades of experience supplying styles for much-loved keyboard brands, this exciting relationship could help bring a rich library of musical accompaniments to ArrangerX, while exploring new possibilities for owners of physical arranger keyboards.

Early technical evaluations and discussions are underway. We'll share more as compatibility testing and licensing arrangements progress.

The whole idea, in four words

Sit down. Launch. Play!

Choose your sound, choose your style, and make music. ArrangerX brings the familiar arranger keyboard experience to your computer.

Built for players

Everything serves the performance.

ArrangerX keeps the arranger controls you expect and removes the complexity you do not need.

Real-time arranger workflow

Styles, intros, variations, fills, endings, split keyboard, OTS-style setups and live sound control are arranged around playing now.

Familiar by design

Familiar performance controls keep your attention on the music.

Bring what you already own

Load compatible SoundFonts and styles from your own collection, and keep your favourites close to hand.

Simple on purpose

V1 focuses on live playing, with the controls you need within reach.

Premium Piano Mode

One touch. A concert grand.

Play Salamander Grand Piano V3 in a beautifully focused full-keyboard experience. The accompaniment controls slide away, leaving you free to enjoy the music.

Actual ArrangerX V1 Piano Mode screenshot showing the grand piano and closed accompaniment shutter
Actual ArrangerX development-build screenshot; the piano image is illustrative artwork.

Structure you can see

Ever wondered when to come in on an intro?

ArrangerX analyses every playable accompaniment section when you select a style and shows its real phrase length on screen.

Seven bars means seven bars on screen. Follow your place as the music plays.

Know when to come in

Intros, endings, fills and breaks reveal their full length.

See how long you have before your entrance and follow an ending right to its final bar.

Real section length Visible before playback Live bar-by-bar progress
ArrangerX showing a genuine seven-bar accompaniment section on its bar display
A genuine 7-bar section, shown exactly as ArrangerX presents it.
ArrangerX showing a full twelve-bar accompaniment phrase on its bar display
A 12-bar phrase is shown in full instead of being squeezed into a generic four-bar counter.

See how detailed a style really is

Every variation shows the full phrase it contains.

Some variations loop quickly; others develop over eight, twelve or more bars. See the whole phrase before you start playing.

Variation detail at a glance Phrase length made visible Choose the right variation for the moment

Bar Length Detection helps you see where the music is going.Multi-bar display available where screen size and resolution permit. ArrangerX automatically adapts its interface for smaller displays.

Your sounds. Your styles.

Your music collection. Ready to grow.

ArrangerX is the instrument you play. The SoundFonts and styles you choose give it its character.

Start with the included sounds, then add compatible content from your own collection. Sound and accompaniment quality will vary with the files you load.

What the planned £99 purchase includesArrangerX V1, its live performance controls, and a General MIDI sound collection. One-time purchase, no subscription.
Add your own soundsLoad compatible SoundFonts, including collections you have purchased, subject to their licence terms.
Bring your own stylesImport supported style files from your own collection. A bundled starter style collection is not yet confirmed; commercial licensing is being explored.
More details: sounds and style compatibility

Our current SoundFont selection includes FluidR3 GM and MuseScore General HQ, two General MIDI sound libraries. Salamander Grand Piano is reserved for Piano Mode and is not shown as a normal selectable library. You can also load other compatible .sf2 SoundFonts from your own collection. Sound and effect reproduction may differ from the original hardware, and full GS or XG compatibility is not guaranteed.

Updated 10 October 2026. These are development test results, not a promise that every style from a manufacturer will work or sound identical to the original keyboard. Import tests check whether file structure, sections and events can be processed; musical fidelity includes the original instrument sounds, chords, effects and listening comparisons.

Passed import testsWork in progressNot verified

On a phone, swipe sideways in the chart to see all results.

Style format testing
Style formatImport testsMusical fidelityEvidence and limitations
Yamaha SFF1 / SFF2 (including SFF GE)PassedStill testingDevelopment audit: 2,887 genuine-format styles parsed; 2,878 passed sampled rendering checks. XG/MegaVoice sounds, effects and some chord rules still need original-keyboard comparisons.
Korg Pa1X / Pa800 / Pa3X and tested Pa4X-era .STYPassedStill testing1,479/1,479 structural decodes passed, with chord-scheduling and playback-event checks. Original sound selection, chord voicing and live listening comparisons remain outstanding.
Korg Pa5XNot verifiedNot verifiedDirect Pa5X style-file compatibility has not been established. Results for older Pa generations must not be assumed to apply.
Roland legacy .STLPassedStill testing15 genuine Roland styles supplied for testing now pass structural, section-availability and instrument-mapping checks. Some sound patches need substitutes; final musical audition and hardware fidelity are not yet signed off.
Roland .STHExperimentalNot verifiedInitial structural test fixtures pass, but representative genuine-file coverage and listening validation are still needed.
Casio .AC7PassedStill testing277 genuine-format styles passed import checks, including 160 older six-element rhythms. More work is needed on certain chord rules and original-keyboard sound reproduction.
Ketron .KST / MIDI-based stylesInitial testsStill testingSection and event extraction passed initial marked-template tests. Broad native-file coverage and musical fidelity are not yet established.
Technics KN5000 / KN7000 native stylesNot verifiedNot verifiedOriginal-format Technics files (including associated .CMP data) have not yet passed native decoding. Technics-origin styles previously converted to Korg .STY are not proof of native Technics support.

Import support does not grant permission to copy, share or resell someone else’s content. Use content in accordance with its licence. Manufacturer style libraries are not included with ArrangerX unless distribution rights have been secured.

Your tablet. Your control surface.

Put ArrangerX in your hands.

Keep your playing controls within reach on a tablet connected to the same home network. The landscape layout is made for touch.

Built for touchChoose sounds and styles, adjust levels and tempo, and trigger intros, variations, fills and endings.
Local network controlThe tablet connects directly to ArrangerX on your own network, keeping the performance experience close to the computer running the music.
More than one ArrangerX computer?Choose which ArrangerX computer to control. Each computer can have its own master tablet.

One master tablet controls each ArrangerX computer at a time. If you have several ArrangerX systems on the network, each can be paired independently.

Current ArrangerX tablet control interface with sounds, style, mixer, tempo and arranger performance controls
Current development-build tablet interface. Shown inside a tablet frame for presentation; tablet hardware is not included.

Optional physical control

Put ArrangerX under your fingertips.

A downloadable ArrangerX skin/profile is being developed for compatible 15-key LCD controllers such as the SOOMFON Stream Controller Classic, giving live players tactile access to their performance controls.

15 programmable LCD keysClear, dedicated controls for intros, variations, endings, OTS, orchestration and navigation.
Live status at a glanceThe controller's separate information display can be used for useful performance status where supported.
Built around affordable hardwareThe aim is to extend ArrangerX without requiring an expensive proprietary control surface.

Predefined layout at launch.
We plan to introduce customisable multi-page layouts in a future update, letting you choose each page's button functions and arrangement. Compatible controller hardware is sold separately.

Controller integration is currently in development. Compatible models and supported status-display functions will be confirmed after hardware testing.

Original blue ArrangerX concept rendering of a 15-key LCD control deck, inspired by the SOOMFON Stream Controller Classic, not an official product photograph
SOOMFON Stream Controller Classic is a 15-key LCD controller sold separately. The picture is an original ArrangerX concept illustration, not a SOOMFON product photograph. SOOMFON is an independent third-party brand and does not endorse or supply ArrangerX. View the SOOMFON controller on Amazon UK (availability and price are set by the retailer).

Planned system requirements

Designed for everyday PCs.

Final requirements will be confirmed against the release build.

Minimum

Core i3 or equivalent

  • 8 GB RAM
  • 20 GB free storage
  • Windows 11 or a checked Linux setup
  • MIDI keyboard recommended

Recommended

Core i5 or better

  • 16 GB RAM
  • 20 GB free storage
  • Windows 11 or a checked Linux setup
  • Low-latency audio interface beneficial

Windows and Linux. Development builds have been tested on Windows 11 and Linux Mint. Run the free computer check on your own setup before buying.

More details: tested computers and Linux setup
Platform testing
SystemCurrent position
Windows 11, 64-bit Intel / AMDPrimary development platform. Tested on the ThinkPad X1 Extreme, T450 and T460. Audio response depends on the computer, audio device and settings; testing continues.
Windows 10The diagnostic and current runtime are intended to run on Windows 10 version 1809 or later. Full ArrangerX release testing is not complete. Windows 11 remains the recommended platform.
Linux Mint 22.3, 64-bitArrangerX’s Linux compatibility build has run on the ThinkCentre M93p using Wine 9.0. This is a Wine-based build, not a native Linux application.
Other Ubuntu-based Linux desktopsMay work with the compatibility package, but have not all been tested. Run the Linux check on your exact installation. The current download is an amd64 .deb and requires Wine 9 or newer.
Mac and Windows ARM / SnapdragonNot yet verified for release. Do not assume compatibility from another computer’s result.

Screen space: smaller screens use a compact layout. The multi-bar display needs more usable screen space than 1366 × 768; display scaling and the taskbar can reduce that space. The free check tells you what to expect.

Audio: a successful computer check is a useful guide, not a measurement of the complete delay from pressing your keyboard to hearing your speakers. Try your own keyboard and audio setup when a trial is available.

Current interface

What ArrangerX V1 looks like now.

Captured directly from the Windows development build on 9 October 2026. Screens show example user-loaded content; pictured styles are not a promise of bundled content.

Current ArrangerX main performance screen
Main performanceThe live playing view with sounds, accompaniment, keyboard, mixer and Song Setups.
Current ArrangerX Main Menu screen
SettingsKeyboard, sounds, styles, effects and controller settings in one place.
Current ArrangerX Sound Groups screen
SoundsGraphical sound-group browsing built around fast performance selection.
Current ArrangerX Style Groups screen
StylesCurrent Style Groups view for choosing accompaniment by musical category.
Current ArrangerX Style Mixer screen
Style MixerLive accompaniment part levels, octave shifts, mute controls and preset saving.
Current ArrangerX Master Graphic EQ screen
Master Graphic EQThe 10-band master output equaliser with native low-latency processing and automatic settings recall.

Check your computer · Smart Calibration

Test before you invest!

Your computer. Your results. Before you buy.

Try our free compatibility check on the computer you want to play. It tests sound performance and screen space, then explains the result.

A demanding music testWe play up to 256 notes together and repeatedly replay large chords to give your computer a demanding music workout.
A report you can understandGet a plain-English result, with optional technical details if you want them.
Your settings stay yoursNo need to install ArrangerX or join a mailing list. Your test results stay on your computer.
Display features checked tooThe compatibility tests check your usable display size and tell you whether the Bar Length Detection multi-bar display will be available on that computer.
Windows Download FREE Windows Compatibility Test

Windows 11 · 64-bit · approximately 32 MB
Extract the whole ZIP, then open ArrangerX Compatibility Test.exe.

Linux Download FREE Linux Compatibility Test

Linux Mint and other Ubuntu-based desktops · approximately 22 MB
Open the download in your Software Manager, install it, then launch ArrangerX Compatibility Test. More details.

Privacy: The compatibility tools record one anonymous app-start count and their version number. Diagnostic results, CPU, RAM and operating-system details stay on your computer and are not sent.

Windows security notice The ArrangerX Compatibility Test is an early preview and is not yet digitally signed. Windows may show Windows protected your PC. If you downloaded the ZIP directly from arrangerx.com, choose More info and then Run anyway to continue. Do not bypass the warning for a copy obtained elsewhere.
Linux support Tested on Linux Mint. Other Ubuntu-based systems may also work; check your own computer before buying. See the tested setup.

Early preview. This test is a guide, not a promise. Different sounds, music, speakers and other running programs can change the result.

Compatibility TestChecking your computer TESTING
YOUR PCMEASURING
Your computerCheckedA real music workout
Your resultExplainedIn plain English
Notes togetherUp to 256Measured on your PC
Display featuresCheckedBLD availability shown
✓Example passing resultGreat news! Your computer passed the music test.

Illustration only. Your downloaded diagnostic measures your own setup and explains your result.

Follow the journey

Be there when ArrangerX is ready to play.

Register your interest and we will let you know about major development milestones, trial availability and launch.

No daily marketing. No selling your details. Just ArrangerX. How we use your information.

Here to help

A question before you play?

Use the AI chat for a quick answer, or email us directly.

Sales enquiries[email protected]Product support[email protected]

Your privacy

ArrangerX is operated by Leigh Buxton. We use your information to provide the website, answer questions and send updates you request. We do not sell your information. Last updated: 9 October 2026.

Development and launch emails

With your consent, we store your email address, optional name and keyboard choice, and the date you joined. We use these for ArrangerX development and launch updates. The interest list is stored using Cloudflare.

We keep your registration while you remain subscribed and the list is in use. You can withdraw consent at any time by emailing [email protected] with “Unsubscribe”. This does not affect earlier use based on your consent.

AI chat and email support

Chat is optional. Your question and recent conversation are sent to Mammouth’s AI service and its selected model provider to generate a reply. Please do not enter passwords, payment details or other sensitive information. AI answers can be wrong.

ArrangerX stores chat questions, answers, a conversation identifier and any escalation for up to 90 days in Cloudflare so we can answer questions and improve support. A shortened hash of your IP address is used for a temporary chat rate limit and expires after two hours.

If you email us, we use your email address and the information you provide to handle your enquiry. Support correspondence is kept while needed to resolve the enquiry and maintain an appropriate record of the outcome. We rely on our legitimate interests in providing support and protecting the service. You can object to this use by contacting us.

Hosting, email and AI providers process information to deliver their services. Their processing may take place outside the UK. Their own privacy terms also apply; contact us if you need more information about a particular provider.

Website visits and the free computer check

Cloudflare hosts and protects this website and processes connection information such as your IP address. The website uses an axv cookie containing a random visitor identifier, lasting up to one year, to count returning visitors. Visitor records include first-visit time and approximate location supplied by Cloudflare, which may include country, region, city and approximate coordinates. This is not GPS location.

We use these records to understand visits and keep them while needed for website statistics. They are not linked to your interest-list email by the registration form. You can block or delete the cookie in your browser. Contact us to discuss or object to the use of visitor information.

The compatibility tools record an anonymous app-start count and their version. Download counts are also recorded. Diagnostic results and details of your CPU, memory and operating system stay on your computer and are not sent by the test.

Your choices and information rights

Email [email protected] to ask about your information, request access or correction, or ask for deletion. Depending on the circumstances, you may also request restriction or a portable copy, or object to processing based on legitimate interests. We may need enough information to identify the relevant record.

You can complain to the UK Information Commissioner’s Office at ico.org.uk. You are welcome to contact Leigh first so we can try to put things right.

In conversation with Leigh Buxton

Why ArrangerX exists.

Five questions about the idea behind ArrangerX V1, the design choices that shape it, and why the music always comes first.

Dark blue keyboard artwork introducing an interview with Leigh about the ArrangerX philosophy

01

Why did you create ArrangerX?

I’ve been searching for decades for something I can simply use to play music live. Time after time I ended up buried in menus and completely distracted from the original intention: sitting down and playing music.

I’ve owned several arranger keyboards over the years, and they’re the only instruments I know where you can switch on, sit down and start playing without having to go through various settings first. ArrangerX grew out of wanting to preserve that experience in software.

02

What should ArrangerX feel like when you first launch it?

I want it to feel as though you’ve just switched on a flagship arranger keyboard. It should be like driving a very expensive car: all the technical complexity is there, but it’s hidden away under the bonnet.

It should work effortlessly and reliably. No complicated procedures. Just sit down and play.

03

Who is ArrangerX V1 for?

Anyone who wants a familiar, premium arranger experience at a fraction of the price.

Many players have built up SoundFont libraries and style collections over many years. ArrangerX gives those resources somewhere to stay alive and remain useful. Unlike a physical arranger keyboard, there’s effectively no limit to how many resources you can add.

ArrangerX V1 is purely about enjoying the performance side of making music. It is intentionally clean and simple. There are other features that live performers would benefit from, and those are something we intend to address separately in the future.

04

What makes ArrangerX different?

It is deliberately kept simple. It’s for people who want the minimum possible distraction and don’t want barriers getting in the way of making music.

Everything in ArrangerX has to justify its existence. If it can’t, it doesn’t belong in the software.

That is why you won’t find things such as VST hosting or a traditional sequencer in ArrangerX V1. There are already excellent tools for those jobs. ArrangerX has one job: let you play.

ArrangerX performance-first artwork featuring Leigh's design principle

05

What do you hope somebody says after spending an evening with ArrangerX?

I hope they simply say that it was an enjoyable experience, and that for the whole time they were using it they were entirely focused on what really matters:

the enjoyment of the performance.