Reason is a digital audio workstation for creating and editing music and audio developed by Swedish software developers Propellerhead Software. It emulates a rack of hardware synthesizers, samplers, signal processors, sequencers, and mixers, all of which can be freely interconnected in an arbitrary manner. Reason can be used either as a complete virtual music studio or as a collection of virtual instruments to be used with other sequencing software in a fashion that mimics "live" performance.