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Super hard(SHD) is a classification of difficulty alongside Easy, Normal, and Hard, originating from the format of songs from beatmania IIDX.

In O2Jam, super hard songs usually use a separate OJN file because the game only allows three difficulty charts (Easy, Normal and Hard)to be stored inside an OJN and OJM file. As such, the resulting SHD files (OJN and OJM) usually have the super hard notechart in the hard difficulty slot while the song in the normal slot is the original hard notechart and the song in the easy slot is the original normal notechart.