ARR
From Just Solve the File Format Problem
				
								
				
				
																
				
				
								
				From Cubase 1.0 (1989) to Cubase VST 5.1 (2001) the file format used by Cubase was .all (Cubase song) and .arr (Cubase arrangement) files. It was only possible to open files on a Cubase version identical or newer than the version that saved the file. The upgrade to a new version of Cubase was not a big issue. Later Cubase software used CPR (for projects).