.2SFLIB File Extension
Nintendo DS Audio Library File
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What is a 2SFLIB file?
File used by some Nintendo DS games; saves sound information used for playing audio during the game; referenced by .MINI2SF files, which point to the parts of the library to play during the game.
MINI2SF files with their corresponding 2SFLIB file can be played using Winamp with the vio2sf plug-in.