An experiment using artificial intelligence (AI) at the annual Richard Wagner Festival in Bayreuth, Germany, received a mixed response on Saturday, with the AI-assisted stage production drawing boos from parts of the audience after leaving many spectators confused.

According to German news agency dpa, curator Marcus Lobbes and his team were booed and whistled at as they appeared on stage after the performance of Götterdämmerung. However, the singers, musicians and especially conductor Christian Thielemann received warm applause.

Festival organisers had announced before the performance that it would be the first time AI played a role on stage at the event, not as a performer but as a tool to generate visual projections.

The production featured constantly changing AI-created images, while the singers remained the main focus on stage. The visuals combined light, textures, historical references and artistic themes, with the AI using images selected in advance by Lobbes and his team from the Academy for Theater and Digitality in Dortmund.

The projections included scenes from earlier performances of Wagner's famous Ring cycle as well as historical images.

According to dpa, many audience members were puzzled by the visual collage, which included images of former German Chancellor Helmut Kohl, the World Trade Center towers after the Sept. 11, 2001 attacks, and a postage stamp marking German reunification in 1990.

The festival's website says each performance will be different because the AI-generated images and associations continuously change. Two more AI-assisted performances are scheduled.