File Extension PT5 File Format Pro Tools 5 session file PT5 stands for Pro Tools 5 session 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 Restoring Source Files on the iSeries Printing with Axis print server for example 5400. Installing PTFs questions and concerns.