Digital Voice File
From Just Solve the File Format Problem
DVF is a obsolete audio format similar to the Memory Stick Voice in the LPEC format. DVF claims to be importable with Sony's newer Sound Organizer software, but often cannot, and an older copy of Digital Voice Editor is needed to convert to other audio formats.
File Identification
Sony DVF & MSV file header begins with ascii "MS_VOICE P SONY CORPORATION
"