One of the main events at this year’s Opera Forward Festival in Amsterdam was a Sophocles-inspired double bill featuring Stravinsky’s 1927 work “Oedipus Rex” and the world premiere of Samy Moussa’s new composition “Antigone.” Although neither piece is defined as an opera as such, both sit comfortably at home within the repertoire. “Oedipus Rex” is described as an opera-oratorio and {…}