4 Fidelio, Op. 72, Act I: "O welche Lust" (Prisoners' Chorus) Georgi Robev, Sofia Philharmonic Orchestra, Bulgarian National Choir & Ludwig van Beethoven
5 Fidelio, Op. 72, Act I: Pizarro's Aria - "Ha, welch ein Augenblick" Boris Christoff, Bulgarian National Choir, Bulgarian Symphony Orchestra & Ludwig van Beethoven