Niece of Gustav Mahler, the violinist Alma Rose was Viennese musical royalty. But that didn't save her from Auschwitz. There, she was ordered to transform a ragged group of female musicians into an orchestra to play as the work details came and left their death-camp hell. Her success saved the women from the gas chambers. Alyn Shipton looks at her life, the suspicion surrounding her death and the misrepresentation of her character in Fania Fenelon's book, "The Musicians of Auschwitz", as seen by some of those she saved.