Baltsa made her first appearance in an opera in 1968 as Cherubino in The Marriage of Figaro at Frankfurt Opera, before going on to appear as Octavian in Der Rosenkavalier at the Vienna State Opera in 1970.
With that maestro, she recorded Le nozze di Figaro (1978), Lohengrin (opposite René Kollo and Dunja Vejzovic, 1976-81) and Der Rosenkavalier (with Agnes Baltsa and Janet Perry, 1982).
His final and 316th performance at the Met was as the Hairdresser in Richard Strauss's Der Rosenkavalier on January 12, 1980 with Agnes Baltsa as Octavian, Anna Tomowa-Sintow as the Marschallin, and Judith Blegen as Sophie.
Agnes | Ágnes Heller | Agnes Monica | Agnès Varda | Agnes Varda | Agnes Nixon | Agnes Giebel | Agnes Gund | Agnes de Mille | Agnes Chan | Agnes Baltsa | King Edward VII's Hospital Sister Agnes | Hurricane Agnes | Ágnes Szokolszky | Ágnes Szávay | Agnes of France, Duchess of Burgundy | Agnes Mary Frances Duclaux | Agnès Humbert | Agnes Buen Garnås | The Eve of St. Agnes | St Anne and St Agnes | St Agnes | Sara Agnes Rice Pryor | Burton Agnes Hall | Alas Agnes | Agnes Walsh | Agnes von Kurowsky | Agnes Samaria | Agnes of Hohenstaufen | Agnes of God |
He also appeared at the Pesaro Festival in La donna del lago, opposite Katia Ricciarelli, Lucia Valentini Terrani and Samuel Ramey in 1983, and made his debut at the Royal Opera House in London, as Tebaldo in I Capuleti e Montecchi, in 1984, opposite Agnes Baltsa and Edita Gruberová, under Riccardo Muti.