Reason Version 4.0 includes the following Modules:

Subtractor: a subtractive synthesizer

Malström: a graintable synthesizer

NN-19: a simple sampler, which loads pre-recorded instrumental and vocal sounds

NN-XT: an advanced sampler, which features the option of tweaking the various modulation, oscillation and filter parameters of a preloaded sample or patch

Dr Rex: a loop playback device, which slices prerecorded samples into manageable, bitesize units

Redrum: a sample based drum machine with a step sequencer

Thor: a semi-modular synthesizer which features, among others, wavetable, FM and phase distortion synthesis

Sounds from these devices can be routed via either of two mixing devices, or simple merging and splitting utilities. Effects include distortion, reverb, chorus, a vocoder and mastering effects.

The Combinator device, introduced in Reason 3.0, allows users to combine multiple modules into one.

Reason’s interface includes a Toggle Rack command, which flips the rack around to display the devices from the rear. From here the user can route virtual audio and CV cables from one piece of equipment to another in just about an unlimited number of ways. This cable layout enables the creation of complex effects chains and allows devices to modulate one another in creative ways.

Reason cannot record audio, therefore it is not a full digital audio workstation. It does not support third-party plug-ins, being one of the few software sequencers to lack VST support. This has been a frequent cause of criticism, although it also contributes to the product’s stability.

A stripped-down version of Reason known as Reason Adapted, which restricts the user to a limited number of devices, is packaged as bonus software with other audio software such as Pro Tools LE and ReCycle.

The most recent version of Reason includes Thor, a modular synth; RPG-8, a real-time programmable arpeggiator; ReGroove, a detimer/dequantizer; and a complete change to Reason’s sequencer which includes tempo and meter changes as well as support for complex meters.

It also includes vector automation (in-track automation/envelope curves), a new pattern lane for editing patterns in arrange view, foldable tracks (mimicking Logic’s folder functionality), beat/bar count-in, and support for multiple takes.

All in all, Reason has been a favorite for IN-HOUSE start-up studios.