The Bamberg Symphony and their chief conductor Jakub Hrůša present a multifaceted meditation on heroism — from the swaggering self-portrait of Richard Strauss’s Ein Heldenleben, to the spiritual resilience of Antonin Dvořák’s A Hero’s Song, Op. 111, to the tender remembrance in Aleksandr Glazunov’s To the Memory of a Hero. Each of the three works engages with the idea of …