: Download the archive and extract the PESSFC.exe to a new directory. Import : Drag and drop your MP3 files into the program. Set Output : Choose your target format (e.g., MP3 to ADX).
You can find a download link and a quick setup guide on this PES Sound File Converter 1.8 Facebook post by Referee. How to Use pes sound file converter 1.8 download
While official hosting for such legacy tools can be unstable, users often find valid versions through community-shared links: : Download the archive and extract the PESSFC