An S16 file is an audio file created by various digital voice recorders, including Sharp PA-VR10E and RCA RP5017A. It contains recorded audio and may also include event marking numbers (up to 50) added by the user, which allows the user to skip to specific parts of the recording.

S16 files can only be played in the digital voice recorder that created them. They can be transferred to a computer via a USB cable as a backup but they cannot be played in a program on a computer. However, S16 files can be converted to .WAV files using Sharp Data Conversion Tool for PA-VR Series (also known as PAVR), which is only available for Windows. NOTE: The name of an S16 file typically includes the date it was created and a number indicating the order in which it was created.