echo-transform uses a graphically notated score that is interpreted by the performer in semi-improvisatory fashion as it scrolls across the computer screen. The score is “mobile” in the sense that it can jump from section to section in any order. The sections can also scroll at a range of different speeds. There are five mobile sections in echo-transform plus an introductory and closing section. Each mobile section uses only 1, 2, 3, 4 or 5 “notes”, however the actual kind of sound that is played as a “note’ is not specified. In is intended that the performer creates a new combination of sounds each time the score appears and if appropriate links their note choice to the previous section. Electronic processing is linked to each section so that the sound environment for each section is similar whenever it is played.