Walter Scott Murch (born July 12, 1943) is an American film editor, director, writer and sound designer. His work includes THX 1138, Apocalypse Now, The Godfather I, II, and III, American Graffiti, The Conversation, Ghost and The English Patient, with three Academy Award wins (from nine nominations: six for picture editing and three for sound mixing).

For his work on Apocalypse Now, Murch was the first person to receive a credit as "Sound Designer." Murch was also the editor and re-recording mixer of Apocalypse Now Redux. In 1998, producer Rick Schmidlin chose Murch as his editor for the restoration of Orson Welles's Touch of Evil. Murch is the author of a popular book on film editing, In the Blink of an Eye, and is the subject of Michael Ondaatje's book The Conversations. Famed movie critic Roger Ebert called Murch "the most respected film editor and sound designer in the modern cinema." David Thomson calls Murch "the scholar, gentleman and superb craftsman of modern film", adding that in sound and editing, "he is now without a peer."

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