[3][6][7] He was Heinrich in Wagner's Lohengrin, and a reviewer described his voice as bright, evenly controlled, and with marvelous timbre ("heller wunderbar gleichmäßig geführter Bass herrlich timbriert"), also noting his commanding stage presence.
[9] In October 2018, he appeared in another double bill, as Tiresias in Stravinsky's Oedipus rex (sung in Latin), and as the physician Ibn-Hakia in Tchaikovsky's last opera Iolanta (in Russian), which was directed by Lydia Steier and conducted by Sebastian Weigle.
[14] He made his debut at the Seattle Opera as Zaccaria in Verdi's Nabucco,[15] conducted by Carlo Montanaro, where a reviewer called his voice a basso profondo, rich in the low register.
[17] Bauer has appeared at more international opera houses, performing the role of Sarastro at the Opéra-Comique in Paris, the Komische Oper Berlin, in Abu Dhabi, Budapest and Malmö,[6] working with conductors such as Claudio Abbado, Colin Davis, Gustavo Dudamel, Philippe Jordan, and Simon Rattle.
[17] His repertory includes works by Johann Sebastian Bach, Handel's Messiah and Dettingen Te Deum, Haydn's Die Schöpfung and Nelson Mass, Beethoven's Missa solemnis, Schumann's Szenen aus Goethes Faust, Mendelssohn's Elias and Paulus, Brahms' Ein deutsches Requiem, Dvořák's Stabat Mater, and Puccini's Messa di Gloria.