Every time I open an audio file in Soundforge or Vegas a duplicate of the file (an SFK file) is created. Any way to turn this feature off or is this something that is necessary so let them pile up in your audio folder?
SFK files contain waveform peaks to draw the waveforms in Sound Forge. Sound Forge creates an SFK when you open a file, if it doesn't already exist. It saves time to keep the SFK files if you will be editing a particular file repeatedly. Otherwise the waveforms have to be recalculated each time you open the file. There is a check-box option in options/preferences/general: to Delete temporary files on close, if you don't want the SFK files lying around.