.PSF1 File Extension
File TypePlayStation Sound Format File
What is a PSF1 file?
Audio file used for sequenced music in Sony PlayStation 1 emulated games; similar to .PSF (Portable Sound File) files but created for PlayStation games; contains samples, which are sounds (like a guitar), and sequences, which indicate how the sounds should be played.
NOTE: The same as .PSF2 files except they're created for PlayStation 1 games.