Old versions used char* for the data, new versions use int8_t*. They're often not the same and differ in signedness.
MIDI spec http://www.borg.com/~jglatt/tech/midifile.htm
Old versions used char* for the data, new versions use int8_t*. They're often not the same and differ in signedness.
MIDI spec http://www.borg.com/~jglatt/tech/midifile.htm