Wirth is the artistic director of the Vienna Choir Boys (Wiener Sangerknaben).
He received his early musical training as a member of the Wiener Sangerknaben
and at the Bruckner Conservatory in Linz, Austria. He is also active as a
composer and arranger.
All Naxos Historical, Naxos Classical Archives, Naxos Jazz, Folk and Rock Legends
and Naxos Nostalgia titles are not available in the United States and some titles
may not be available in Australia and Singapore because these countries have copyright
laws that provide or may provide for terms of protection for sound recordings that
differ from the rest of the world.