This album is a mastering of the concert performed by the Kuss Quartet at the Fundación Juan March in Madrid on April 08, 2026. It features the world premiere recording of Quartets No. 11 and 12 by Conrado del Campo (1878–1953), one of the most original and least known Spanish composers of the first half of the twentieth century. This recording is part of the Conrado Project. Launched in 2021, this ambitious initiative aims to present, for the first time, the complete body of his thirteen string quartets and to publish a comprehensive edition of the scores, most of which remain unpublished, along with the recordings released by the MarchVivo label. This initiative supports the recovery of a repertoire that has been unfairly consigned to oblivion.