“On wings of song” – Heine’s words and Mendelssohn’s immortal melody, sung here by the inimitable Rita Streich, perfectly encapsulate the spirit of this collection. Six of the greatest voices of the last half-century perform a range of familiar music: romantic Wagner from Gré Brouwenstijn and collectors’ items such as Egk’s four Italian songs from the matchless Irmgard Seefried. These are the commanding voices of their day, from Christa Ludwig’s warm mezzo in Brahms and Mahler to Gundula Janowitz’s crystalline soprano and the dramatic brilliance of Galina Vishnevskaya, all captured in their prime.