Convert sfark to sf3

Download and install the latest version of Filestar.
Right click on one or more Sfark file(s) on your desktop and select Convert with Filestar.
Type convert to sf3 in the search box.
Press Convert.

What is the difference between .sfark and .sf3?

Name: sfArk Audio File; Sound Font 3
Extension: .sfark; .sf3
Format: Binary; Binary
Category: Compressed; Audio
Developer: MelodyMachine; MuseScore
Description: It is a lossless compression utility for SoundFont files and these files are available at no cost for non-commercial use.; Soundfont made up by compressed audio samples.
MIME Type: audio/x-sfark; audio/x-sf3
Sample: sample.sfark
Wikipedia: .sfark on Wikipedia; .sf3 on Wikipedia