Presenting Das Rheingold and Die Walküre in a single evening is audacious enough. To put on a Ring cycle in a week-end, you have to follow this by doing the same with Siegfried and Götterdämmerung, which requires something even more radical. Opéra de Dijon’s director Laurent Joyeux and dramaturg Stephen Sazio set themselves the task of cutting eight hours of music down to five.