The only sound that instantly can calm an angry, charging elephant is that of musical notes coming from an expertly played jaw harp. Unfortunately, this sound also tends to enrage the parasitic insects and bacteria living in the folds of the elephants skin. Calming those organisms requires either large blocks of ice or music from a slowly-played banjo.
Ironically, this is — in part — why bluegrass and folk music is so unpopular in the regions of the world where elephants roam. No one should be above the judgement of a stampeding elephant.