Hauser studied at the Music Academy in Berlin with Marcella Röseler.
He made his debut during the 1940-1 season at the Staatstheater in Braunschweig.
His career evolved as follows:
1941-43, Stadttheater in Duisburg
1943-44, Deutschen Theater Prag (where the Opera troupe of Duisburg evacuated)
1945-47, Landestheater Salzburg
1947-49, Opernhaus von Graz
1949-50, Stadttheater von Heidelberg
In 1950, he became the first Lyric Tenor at the Städtische Oper Berlin. He stayed there until 1956.
After he sang as guest including the Vienna Stattsoper (Aida as Radames on March 20, 1948 (Staatsoper im Theater an der Wien)
with Maria Prochaskova,
Marjan Rus, Elena Nikolaidi, Ferdinand Frantz, Giuseppe Taddei, Willy Friedrich, Berta Seidl, Rudolf Moralt; Rigoletto
on June 27, 1949 (Staatsoper im Theater an der Wien) with
Marco Rothmüller, Maria Tauberova, Alfred Jerger, Viktor Madin, Aenne Michalsky, Hans Schweiger, Erich Majkut,
Herbert Alsen, Georgine von Milinkovic, Polly Batic, Dorothea Frass, Wilhelm Loibner; Cavalleria Rusticana on April 7, 1955)).
His repertory included: Tamino, Erik, Narraboth, Bacchus, Ernesto, Alfredo, Radames, Turiddu,
Pinkerton, Calaf, Faust, Fra Diavolo, Hoffmann, Vasco, Hans,
Dimitri/Grigori, Alfred, Barinkay, ...
He recorded for Telefunken, Odeon, Urania-BASF (Verkaufte Braut, Zigeunerbaron), BASF (Wiener Blut).
Reference: Kutsch & Riemens