iMUSE (Interactive MUsic Streaming Engine) is an interactive music system used in a number of LucasArts video games. It synchronizes music with the visual action in the game, and transitions from one musical theme to another. iMUSE was developed in the early 1990s by composers Michael Land and Peter McConnell while working at LucasArts. The iMUSE system is patented by LucasArts, and was added to the SCUMM game engine in 1991. The first game to use iMUSE was Monkey Island 2: LeChuck's Revenge and it has been used in all LucasArts adventure games since. It has also been used for some non-adventure LucasArts titles, including Star Wars: X-Wing (DOS version), Star Wars: TIE Fighter (DOS version), and Star Wars: Dark Forces.
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