Cut Up the Border is a 2020 live album by English guitarist and composer Fred Frith, German film maker Nicolas Humbert and French sound artist Marc Parisotto. It comprises a collage of unused audio material recorded between 1988 and 1990 for the documentary film on Frith, Step Across the Border, overlaid with live improvisations by Frith performed in January 2019. The album was released by French record label RogueArt in January 2020.

Step Across the Border is a 1990 avant-garde documentary film on English guitarist, composer and improviser Fred Frith. It was written and directed by Nicolas Humbert and Werner Penzel and released in Germany and Switzerland. The film was screened in cinemas in North America, South America, Europe and Japan, and on television in the United States, Germany, Switzerland, Austria and France. It was also released on VHS by RecRec Music (Switzerland) in 1990, and was later released on DVD by Winter & Winter Records (Germany) in 2003.