Committed to 20th- and 21st-century repertoire, Zimmermann premiered Ligeti's Viola Sonata, which was written for her, on 23 April 1994 in Gütersloh.
kəmˈɪɾᵻd tə twˈɛntiəθ ænd twˈɛnti fˈɜːstsˈɛntʃɚɹi ɹˈɛpɚtwˌɑːɹ, zˈɪmɚmən pɹəmˈɪɹd lˈaɪdʒtiz vaɪˈoʊlə sənˈɑːɾə, wˌɪtʃ wʌz ɹˈɪʔn̩ fɔːɹ hɜː, ˌɔn twˈɛnti θɹˈiː ˈeɪpɹəl nˈaɪntiːnhˈʌndɹɪd nˈaɪnti fˈoːɹ ɪn ɡˈuːɾɚslˌoʊ.