Siegfried and Götterdämmerung DVD Barcelona's Ring - the best recent cycle on DVD Cornish heldentenor John Treleaven's stalwart Siegfried heads generally decent casts. He stays the course heroically and radiates both boisterous rough-diamond geniality and youthful pathos and lyricism. It's good he's coming to Covent Garden this year. BBC Music Magazine - September 2005