Incredibly, there were orchestras in most Nazi concentration camps – music became a means of control. Popular ballads conjured an illusion of normality for camp arrivals, while marching tunes imposed order on slave labourers. On Sundays, performing prisoners were forced to entertain their tormentors. By using the testimony of musicians at Auschwitz and the pieces they played, this concert honours their memory and the lives of the millions who did not survive.