The problem? The repack was booby-trapped. If he tried to mount it normally, a kill switch would zero out the drive.
Identify the folder where the app looks for user libraries (typically Documents or a dedicated SoundFonts directory within the bundle). Copy your .sf2 files into this directory. bismark bs16i ipa repack
Includes a standard "GeneralUser GS SoftSynth" sound pack by default. Understanding the "Repack" Phenomenon The problem