import sys sys.path.append("midi") from MidiOutStream import MidiOutStream from MidiInFile import MidiInFile """ This prints all note on events on midi channel 0 """ class Transposer(MidiOutStream): "Transposes all notes by 1 octave" def note_on(self, channel=0, note=0x40, velocity=0x40): if channel == 0: print channel, note, velocity, self.rel_time() event_handler = Transposer() in_file = 'nevergoingtoU.mid' midi_in = MidiInFile(event_handler, in_file) midi_in.read()