 The experimental low-band quadruplex recording system in use was troublesome and hard to copy.Furthermore, early video editing was a highly complicated matter that required the engineer to cover the two-inch tape with iron oxide solution to locate the magnetic tracks and then splice it with a razor blade.Although it was recorded live, "An Evening with Fred Astaire" used a number of innovative production techniques that are now commonplace, such as chroma key, and dissolves between scenes.