S=Sound[{SoundNote["g", 0.4], SoundNote["g", 0.4], SoundNote["a", 0.4],
  SoundNote["a", 0.4], SoundNote["g", 0.6], SoundNote["f", 0.2],
  SoundNote["e", 0.8], SoundNote["g", 0.4], SoundNote["g", 0.4],
  SoundNote["a", 0.4], SoundNote["a", 0.4], SoundNote["g", 0.6],
  SoundNote["f", 0.2], SoundNote["e", 0.8], SoundNote["g", 0.4],
  SoundNote["g", 0.4], SoundNote["a", 0.4], SoundNote["b", 0.4],
  SoundNote["c5", 0.8], SoundNote["d5", 0.8], SoundNote["b", 0.9],
  SoundNote["a", 0.2], SoundNote["b", 0.2], SoundNote["a", 0.2],
  SoundNote["g", 0.8]}]
Export["cameron_kirk-giannini.midi", S, "Midi"]