File Extension SF File Format IRCAM / MTU SoundFile format SF stands for IRCAM / MTU SoundFile format. 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 PTF Installation via Image Catalogs PSP Version 5.4 Hiper Group SF99347 and SF99538 What's the biggest UDP packet I can send?