That evolution occurred via the creation of Omnisphere's large, imaginative sample library, and also courtesy of the intricate programming functions introduced in Spectrasonics' custom 'Steam' sound engine. Those of you who upgraded from Spectrasonics' Atmosphere to the all‑singing, all‑dancing Omnisphere over the last year will have enjoyed its remarkable metamorphosis from a comparatively simple plug‑in instrument to a complex, highly programmable and versatile sample‑based soft synth. Spectrasonics' new Steam‑driven bass module bundles 34GB of electric, acoustic and synth basses into one package.