This library has been finely tuned to work with Reason's NN-XT Sampler. Also included are 128 combinator presets that combine the NN-XT instruments with the effects.

The Proteus sound modules revolutionized the sample playback industry. These early 1U rack modules hand a great wealth of sounds allowing musicians to get the sound they were looking for quickly. This Reason Refill represents the early Proteus modules with a total of 383 Instruments and 383 Combinators with MIDI controller macros and effects routings.