German violinist, born in 1963 as the son of German-Hungarian musicians. Reviewers regularly have to resort to superlatives in order to describe his virtues as a violinist (the New York Times called his appearance at Carnegie Hall "sweet, strong and sure, graceful and musical" and its final judgment was "excellent". In 2005, Ostertag was appointed professorship at the Musikhochschule in Trossingen.