Concert Hall, Hong Kong Cultural Centre / Hong Kong / Jan 18, 2018 / Ernest Wan / In each of its past three concert seasons, the Hong Kong Philharmonic Orchestra, under the leadership of music director Jaap van Zweden, has presented one opera from Richard Wagner’s tetralogy Der Ring des Nibelungen, aka the Ring Cycle. The plaudits that these concerts and the commercial recordings made of them have received meant there were high expectations for Götterdämmerung (1874), the fourth, longest and toughest work in the cycle. Happily, this final instalment did not disappoint. The orchestra, over a hundred strong, inevitably sometimes overwhelmed the solo singers, with the former just behind the latter on the stage. Daniel Brenna sounded youthful as the hero Siegfried should, but his voice and tone were wanting in power and focus respectively. As Gunther, the ruler of the Gibichung race, Shenyang had a sound that was dark and indistinct in Act One, but thereafter his voice opened up. By contrast, Eric Halfvarson sang with power and authority throughout, in a vivid and often frightening portrayal of the villain Hagen, Gunther’s half-brother. Peter Kálmán’s appearance as …