MIDI from game rips often has:
The process of converting to MIDI allows musicians and video game enthusiasts to extract the sequenced note data from Nintendo DS games for use in modern digital audio workstations (DAWs) . Because mini2sf files are specialized containers for DS music data, standard audio converters cannot process them; you instead need tools that can read the proprietary SSEQ (sequence) data hidden within. What is a mini2sf File? mini2sf to midi