He began professional studies in 1972 at the age of ten with the admission to the piano class for exceptional students at the University of Music and Performing Arts, with the violin as a second instrument.

Since then he has given recitals in Europe, Japan, and the United States and concerts with orchestras such as the Gewandhauskammerorchester Leipzig, the Leipziger Kammerorchester, the Orchestre Philharmonique du Luxembourg, the Westdeutsche Sinfonia, the Staatsphilharmonie Rheinland Pfalz, and the Robert Schumann Philharmonie with conductors such as Dennis Russell Davies, Alun Francis, Dirk Joeres, Daniel Klajner, Hilary Griffiths, Marcus Bosch, Vladislav Czarnecki, Reinhard Seifried, Marcello Bufalini, and Jonathan Seers.

Vorraber recorded a cycle of Robert Schumann's complete piano works during twelve sessions in different cities in Europe and Japan.

During his career Vorraber has received many prizes, for example from the Ministry of Education, from the piano manufacturer Bösendorfer in Vienna and from the city of Graz.

A great success was also the project "Sätze von Liebe" (Sentences of Love) with poems and self-compositions together with the writer Peter Härtling.