File Extension WA0 File Format Magix Musstu file WA0 stands for Magix Musstu file. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question How to open TFX file? How to parse xml values Problem Migrating from RBO to CBO.