(* a simple scale *)
u= Transpose[CellularAutomaton[6, {{1}, 0}, 29]]
sound1 = Sound[SoundNote[DeleteCases[3 Range[30] Reverse[#], 0] - 48, .3] & /@ u]
Export["samantha_go1.midi", sound1, "Midi"]

(* What living inside a cell would sound like (if organelle movements sounded like pianos *)

u =  Transpose[CellularAutomaton[45, {{1}, 0}, 27]];
sound2 = Sound[SoundNote[DeleteCases[4 Range[28] Reverse[#], 0] - 48, .3] & /@ u ];
Export["samantha_go2.midi", sound2, "Midi"]