With Propellerhead's Rack Extension platform, developers can move faster from initial idea to finished product than ever before. Regardless of whether your skills lie in hardcore DSP coding or in creating beautiful samples, the Rack Extension platform has all the tools you'll need to develop stunning instruments and effects and bring them to market with minimum effort and maximum support.
The recently updated developer toolkit adds features and tools for developers to create even more advanced and great-looking instruments and effects. With the Instrument Development Toolkit, it's easier than ever to build advanced instrument Rack Extensions, even without prior coding experience.
Rack Extensions are full citizens of the Reason Rack, cross-platform compatible, copy-protected, future-proof, and easy to sell direct to Reason users in the Propellerhead Shop. How to become a developer.
A new generation of inventive Rack Extensions are waiting to be created! The latest version of the Rack Extension SDK enables developers to create their own Players, Reason’s unique and highly popular MIDI devices. It also includes support for pattern lanes – allowing Rack Extensions to use Reason’s pattern lane system. Furthermore, the new SDK provides improved sample support, allowing for multiple sample drop zones.
SDK 3 also introduces IDT2, a new instrument development toolkit based on UJAM Gorilla Engine. An end-to-end toolkit for building high-quality sample-based instruments, synthesizer or effect Rack Extensions without advanced coding knowledge.
SDK 3 replaces SDK version 2, and is available with Reason 10.1, a free update to all Reason 10 owners.
Rack Extensions are cross platform, and will continue to work in the next version of Reason, and the next after that. You focus on building cool products, not maintain code. The Rack Extension platform will be kept up to date with current operating systems, removing the need for developers to update their products.
A Rack Extension lives inside the Reason Rack, like any other rack device. They are fully integrated in the Reason user experience and work seamlessly with the host application. Automation, undo, cables on the back, pattern lanes, browsing patches, music hardware integration and much more—it's all handled by Reason.
With the Rack Extension technology, we have taken care of the mundane household tasks, so that you can focus on what matters: your product idea. Leave it to us to take care of file handling, automation, undo, music hardware integration and more.
The SDK comes with a library of useful code for Rack Extension development, such as FFT, memory handling, undo, sandbox, routing and communication with the Rack Extension host.
Recon is used to test and debug your Rack Extension project. It's a test bench version of Reason based on Reason Intro that lets you load and run your prototype Rack Extensions and test it with Reason’s workflow, devices, other Rack Extensions and VSTs.
With the LLVM compiler, you compile your C++ code to bitcode that is used to build the Rack Extension. It's the compiled bitcode that is uploaded along with your Rack Extension's other resources to Propellerhead's automated build system.
Design your Rack Extensions as you choose. RE2D lets you create 2D, high-resolution user interfaces for your products and convert to Reason’s format. The Rack Extension Designer (RED) 3D design tool is also available, though no longer the preferred format. In this tool you lay out and preview a 3D graphical interface. If you prefer to work in 3D, you can then convert your 3D GUI to RE2D format.
As an alternative to creating your own GUI objects, more than 100 interface parts such as knobs, buttons, faders and display objects are supplied in the Parts Library. Each object can be customized to adjust properties such as color, texture, and more. This is available for both 2D and 3D GUIs.
Do you sit on the idea for an amazing Rack Extension instrument, but don’t speak the language of DSP? Are you apt at building sample libraries? Then IDT2 is for you!
IDT2 is a development toolkit that allows you to create high-quality synthesis- and sample based Rack Extension instruments without advanced coding knowledge. Build anything from big string libraries to vintage-style synthesizers using the UJAM Gorilla Editor and an entire array of tools and scripts from UJAM Gorilla Engine, including 70 premium effects, filters, modulators, oscillators and sequencers. Your great idea just got a lot closer to a finished product in the Propellerhead Shop!
IDT2 is included with Rack Extension SDK3. UJAM Gorilla Engine and Gorilla Editor are developed by UJAM.
Help is there when you need it. We are as eager as you to see your projects finished and will always be there to help you out.
There is nothing like learning from your peers. As a Rack Extension developer you’re granted access to the Rack Extension developer forum — a lively and active community of developers. Check out the collection of stickies full of helpful tips to get started.
Testing is of course essential to a quality product release. The developer section of the our web site gives you access to beta testing tools to help you distribute beta licenses to your testers.
The SDK comes with ten written tutorials with code and scripting examples that will help you along the process from initial design to finished product.
To dip your feet in the Rack Extension technology, we have supplied three straightforward example projects that will show how to create a simple instrument, a simple effect unit and a device with a custom display.
For help and assistance, we are always available to help you out. Our staff can help and guide you with issues related to development, administration or sales issues.
Aside from Rack Extensions, Propellerhead offer several de facto industry standard technologies for developers to use.
ReWire is system for streaming audio from one application to another. Pioneered in Propellerhead Software's ReBirth, it is now supported in every major DAW on the planet. The API, which is written in ANSI C, also has support for play positioning information, MIDI streaming and a toolkit for communication between the applications.
The REX file format allows for free manipulation of timing and feel within a sampled groove. A REX file contains the original audio of the loop, the slices you have applied in ReCycle, and any effects or processing you have added in ReCycle. REX files are also compressed, using a non-lossy compression technique to save some precious hard drive space. The REX format has been implanted in just about any DAW or software sampler out there.
Remote is a protocol for handling communication between control surfaces (MIDI keyboards, remote control devices, etc.) and software applications (e.g. Reason). It handles everything from delivering MIDI note data from a keyboard to the application to using knobs, faders and buttons on a control surface for tweaking synth parameters in the application, controlling transport, etc. Remote also supports two-way communication, in order to make use of motor faders, dynamic displays and LEDs.
NN-XT is the flagship sampler in the Reason Rack. A fully featured sampling instrument, it comes with everything needed to build rich and natural sounding sample patches. The NN-XT file format is open to third party developers to allow external applications to create NN-XT patches.
Formed in 1994, Propellerhead Software is a privately owned company based in Stockholm, Sweden. Renowned for its musician-centric approach, Propellerhead has created some of the world's most innovative music desktop software applications, mobile apps and technology standards. Musicians, producers and the media have praised Figure, Reason, ReCycle and ReBirth applications for being inspiring, great sounding and of impeccable quality. Technologies such as ReWire and the REX file format are de-facto industry standards, implemented in all major music software. Today, Propellerhead's products are used all over the world by hundreds of thousands of professionals and enthusiasts for all kinds of music making.
Got more questions? Ask us and we'll do our very best to help you out!
Anyone can register as a developer, but only companies can sell Rack Extensions or ReFills in the Propellerhead Shop.The requirements for selling products in our shop are:
This means each developer will sign up for a user account and then apply to register a new company.If you don’t have a company yet, you can put your own name in the company name field.
If you want to be included in a previously registered company, send an email to that company and ask them to add you as a developer.
There are no costs involved. Propellerhead Software will administer the authorization, copyrights, logos, and trademarks.We’ll also provide technical support, free of charge.