Johannes Kreidler’s 2009 conceptual performance piece Fremdarbeit (Outsourcing) was composed, as the title suggests, by means of hiring foreigners. Kreidler payed a composer in China and a computer programmer in India to study his previous work and produce a chamber composition in his style.
This according to “Fremdarbeit: Kompositionsaktion für Ensemble, Sampler und Moderator–Ein Gespräch” by Carolin Naujocks (Positionen: Texte zur aktuellen Musik 93 [November 2012] pp. 26–29).
Above, the composer with the performance artist Leowee Polyester in 2007; below, a documentary about Fremdarbeit with English subtitles.