.SFK File

File extension sfk is mainly related to a special type of temporary files created by Sony programs, such as ACID, SoundForge or Vegas.

The typical .sfk file contains visual data that help the program draw the audio waveform on the screen. Meant to speedup the process.

It appears that this file is mainly generated automatically when a song is put into a projects or when an audio file is opened.

For example CD Architect will always create an .sfk file automatically when you put a song into a project, whilst Sound Forge creates .sfk files when you open a file in "Direct Mode" and also creates these files when you save a .wav file and answer Yes to "Would you like to reopen the file in Direct Mode?"

You should be able to find some option menu that clears and deletes these files when the program is closed, but you can always delete them manually.

Files with sfk extension can be usually encountered as temporary files generated to visualize audio waveforms in several Sony applications, including ACID, SoundForge or Vegas.

How to open:

This file type is generated automatically by the program, users are not meant to access or edit this file type manually.

How to convert:

It does not appear to be possible to convert or recover this type of temporary files.