PTF

PTF is the format used for saved sessions from the Pro Tools digital audio workstation software, in versions from 7 to 9. It was replaced with PTX for versions 10 and up. It is a session file which doesn't directly contain the audio data, but should be accompanied by audio files (such as WAV).

Links

 * Official site
 * Pro Tools Session Compatibility and Interchange
 * ProTools 9 Reference Guide - Session Formats