In the last of this season’s Come to the Concert classes, we explore two contrasting works: the challenging Symphony No.1 of Gustav Mahler of 1889 and Sherwood Legend by Canadian composer Elizabeth Raum. Mahler’s symphony has acquired the nickname “Titanic,” a name which certainly describes the task facing listeners of this complex work, who must find a shape for the experiences of the hero of this musical adventure. A similar rewarding but less daunting task faces listeners to Raum’s Sherwood Legend, whose more accessible hero is “Swashbuckling,” ”Pensive,” and an “Unabashed Scoundrel” more in the manner of movie heroes of the recent past.