She made several complete opera recordings mainly for the Decca label : her interpretations of Countess Almaviva in The Marriage of Figaro ( Erich Kleiber ) and the title role in Arabella ( by Sir Georg Solti ) are regarded as among the finest recorded .
She made several complete opera recordings including her singing of Countess Almaviva in Le nozze di Figaro ( Erich Kleiber conducting ) and the role of Arabella in Arabella ( Georg Solti conducting ) .