Rack Extensions

Everything your music needs today.
And tomorrow.

Reason 6.5 and Reason Essentials 1.5 – the new Rack Extension powered versions of the world’s favorite music software are here.

Rack Extensions expand Reason and let you add whatever your music needs – be it instruments or effects, by Propellerhead or others. Try it, buy it, and download it straight into your rack. There simply are no risky choices. Just everything your music needs today. And tomorrow.

Rack Extensions are available in Reason 6.5 and Reason Essentials 1.5. For owners of Reason 6 or Reason Essentials, the upgrade is free.

Get your free upgrade

*All product names used are trademarks of their respective owners, and in no way constitute an association or affiliation with Propellerhead Software or companies interviewed. Any products or trademarks mentioned in this video are solely used to identify the products whose sound was studied during development and/or for comparison purposes only.

What are Rack Extensions?

With Rack Extensions the Reason rack opens up to third party developers. This is not another plugin format – Rack Extensions are full Reason rack citizens, giving you the same great experience as any other Reason device. Load them in Combinators, route cables on the back, automate all parameters, and experiment with the safety of undo.

Browse all Rack Extensions in the Propellerhead Shop and even download fully functional trial versions to load into your rack. Every Rack Extension you have purchased can be downloaded as many times as you need – for both Mac and Windows – and the latest version is never more than a click away.

Rack Extensions Press Announcement

“If I could sum up what musicians want
in one word, it would be ‘more.’”

- Ernst Nathorst-Böös
Live technology preview from
Musikmesse in Frankfurt, Germany
Rack Extensions Logo

Rack Extensions from Propellerhead

It’s not just third parties who are getting into the creation of Rack Extensions. Propellerhead Software is also releasing their own Rack Extension devices for Reason 6.5 and Reason Essentials 1.5.



Polar Demo Sounds

Available in the Propellerhead Shop

Polar is an old school harmonizing and pitch-shifter effect with a host of modern tricks up its sleeves. Use it for classic harmonizing, stereo-widening, and realtime pitch-shifting, or experiment with buffer looping and audio freezing to create otherworldly effects.

Load up Polar in the rack, and it will instantly make your sounds wider. Introduce slight pitch-shifting to make it even bigger. Turn the Shifters to add harmonics — up to two octaves above — or radically change the pitch down to two octaves below. Finish up your patch by turning on the filter, manipulated by the built-in LFO and envelope.

If you are a singer, producer, guitarist or remixer who is looking for transparent pitch-shifting, creative ways of turning bland recordings into wide, evolving soundscapes — or want to completely mangle a sound into an interesting mess, Polar brings all this and much more to your Reason rack.



Pulsar Demo Sounds

Available in the Propellerhead Shop

Pulsar LGM-1 is a dual channel modulation powerhouse for the Reason rack. We call it an LFO—but it’s also a powerful little synth in its own right. For tweakers, Pulsar makes every single thing in the rack a little bit better. For back-of-the-rackophobes it comes with patches containing everything from lush evolving pads to the grittiest of wobble basses.

Need to add slow modulation to a filter, or alter the speed of a tremolo as you trigger new notes? Pulsar is up for any task. Turn up the Shuffle parameter to introduce some irregularity to your modulation. Smooth out sharp waveforms using Lag. Or go all-out bonkers and let LFO2 trigger the built-in envelope, set to change the rate of LFO2, and route the combined outputs of both LFOs to control the rate of LFO1.

Yeah, we didn't understand that either, but it sounds like this:

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When the rate is turned up, Pulsar transforms from low frequency oscillator to high powered synth with plenty of character. The LFO waveforms in combination with lag and shuffle brings tons of tones—edgy and noisy.

Radical Piano

Radical Piano

Radical Piano Demo Sounds

Available in the Propellerhead Shop

The premise is simple. The results are stunning. We’ll give you three basic pianos paired with the technology to make an infinite number of your own. Based on a custom blend between sampling technology and physical modeling algorithms, Radical Piano affords songwriters, producers, and sound designers an unprecedented level of control to craft a realistic piano that is 100% unique.

With Radical Piano you can do things that are otherwise impossible, not only in multi-gigabyte sample libraries but even in the recording of actual acoustic pianos. Do you wish your close mic’d grand piano sounded just a little bit more like a vintage mono upright piano? Use the microphone blend to create a hybrid modeled sound. Route audio like a vocal through the jacks on the back of Radical Piano to hear it resonate the strings as if you had recorded piano and vocals together live. What if with the turn of a knob you could transform the tonal characteristics of your piano, shifting from a soft intimate performance to a bright aggressive instrument that will cut through your mix? We’ve got that knob, and it’s called “Character.”

Radical Piano will change the way you use pianos in your music by allowing you to imagine a piano in a real space and set about creating it yourself through intuitive controls. Or like you have done with synthesizers for years, you can listen to your favorite song and emulate the recording with uncanny accuracy. Perhaps even more impressive, the realism of Radical Piano will affect the way you play because it responds like a real piano to sustain pedal movement, key noise and velocity response.

Rack Extensions from Third Party Developers

With the Reason 6.5 and Reason Essentials 1.5 release, we're also launching the Propellerhead Shop. It will be the central location where users can try and buy Rack Extensions with single-click ease. The Rack Extension technology has been met with great enthusiasm from the developer community and the list of committed developers is growing by the day. Below is a small sample of companies that are already selling or are planning sell Rack Extensions in the Propellerhead Shop:

u-he Softube Rob Papen FXpansion GForce Peff Sugarbytes Korg Sonic Charge

Buy now — get the upgrade free!

To use Rack extensions, you need Reason 6.5 or Reason Essentials 1.5. If you purchase (or already have) Reason 6, Reason Essentials or Balance you can get the needed upgrade from this page.

Reason Box

If you buy:

  • Reason 6
  • Reason 6 Upgrade
  • Reason Student/Teacher
  • Reason Upgrade for Adapted/Limited/Essentials

You get Reason 6.5 FREE!

Purchase here:

Balance Essentials Box

If you buy:

  • Reason Essentials
  • Balance with Reason Essentials

You get Reason Essentials 1.5 FREE!

Purchase here:

Developers — get in touch!

Are you a developer and would like to get access to the Rack Extension SDK?
Please apply for becoming a Rack Extension developer here.