 As pianist, Frey has given the world premieres of Leonard Bernstein's "Five Anniversaries" and "Thirteen Anniversaries", as well as the European and Asian premieres of that composer's "Sonata for the Piano".He gave the world premieres of Erich Wolfgang Korngold's "Vier Walzer" (Four Waltzes), Kurt Weill's "Albumblatt" (the composer's only work for solo piano) and Franz Schubert's then-unpublished "Fugue in D minor" for organ.Frey was Musical Advisor to the Hollywood in Vienna Festival from 2007–2013.