Färbach studied singing mainly in Berlin.
He made his debut during the 1908/09 season at the Hoftheater of Sondershausen (Thüringen).
Färbach's career developed as follows:
1909–10 Stadttheater in Elberfeld
1910–12 Stadttheater in Stettin (in 1911, he sang in the world premiere of Ziehrer's operetta Ball bei Hof)
1912–14 Stadttheater in Halle (Saale)
1914–15 Opernhaus in Breslau
1915–18 Stadttheater in Strasbourg
1919–20 Stadttheater in Freiburg in Breisgau.
His career was at its peak when he sang in Mannheim (Nationaltheater) from 1920 to 1926.
After that, Färbach appeared only as a guest and taught singing in Mannheim.
Färbach made guest appearances at the biggest opera houses in Germany. He was especially successful as
a Wagner tenor (Erik, Lohengrin, Walther von Stolzing, Siegmund, Parsifal).
Besides those roles, his vast repertory included Ottavio, Radames, Turiddu, Canio, José, Wilhelm Meister, Matthias
(Evangelimann by Kienzl), Chabel (Die ersten Menschen by Rudi Stephan) und Elis (Schatzgräber by F. Schreker).
He recorded for Polydor, Vox and Tri-Ergon.
Reference: Kutsch and Riemens