Gurre-Lieder, Part I: no. 6: "So tanzen die Engel vor Gottes Thron nicht" (Waldemar) by Yvonne Minton , BBC Singers , Jess Thomas , Kenneth Bowen , Goldsmiths Choral Union , BBC Symphony Chorus , Marita Napier , Siegmund Nimsgern , Günter Reich , BBC Symphony Orchestra , Pierre Boulez