Ubuntu Studio is a specialised Linux distribution focused on media creation. While there is no single open source application that provides all features of a comprehensive package like Reason, there are distributions of Linux designed for studio workstations, combining several applications to provide comparable features. Featured software includes multitrack recorders, MIDI sequencers, virtual amplifiers and effects processors. Ubuntu Studio also features JACK, an advanced audio system allowing the audio inputs and outputs of separate applications to be connected together. As with many Linux distributions, studio-focused distributions can often be run from CD for testing without installing anything to the computer’s hard drive.