Margreet Honig – Der freie Ton
- annos singulos: 1970
- Patriam:
- genus: Documentary
- Studio:
- keyword: singing lessons, vocal coach
- Director: Stefan Haupt
- cast: Margreet Honig, Hans Adolfsen, Magdalena Kožená, Rafael Oliveira Gonçalves, Eszter Gyüdi, Gerben van der Werf
