 The couple's playing and singing complemented each other perfectly and arias with "obbligato" oboe were written for them, as for instance those in "Günther von Schwarzburg" (1777) by Ignaz Holzbauer, "L'Europa riconosciuta" (1778) by Antonio Salieri and "Castore e Polluce" (1787) by Georg Joseph Vogler.The music historian Charles Burney wrote about appearances of the pair