Almost every performance on the Main Stage at Dutch National Opera & Ballet is preceded by an introduction, which starts 45 minutes before the performance. The introduction takes place in the Souterrain (formerly Odeonzaal, entrance on the ground floor) and is free for the audience. The speaker will be using sound amplification. A few days before the première, the introduction is also available as a podcast. On the program page of the concerning performance, you can see whether the podcast is already available.