A significant musical event occurred in San Mamés. The event, referred to as Zetak, was described as an apoteosis musical, indicating a high level of musical achievement or celebration. Further details about the event are available from the source, El País.

It is mentioned that Pello Reparaz is associated with the event, but the nature of this association is not specified here. For more information about Zetak and its significance, readers can consult the original article in El País, which may provide additional context and insights into this musical phenomenon.