At 28, Troncoso moved to Madrid, looking for new horizons to develop her career, and continued studying with Miguel García Barroso. She responded to the public call for admission to the RTVE Choir, obtaining a place. There she had the opportunity to sing under the baton of Igor Markevitch, Nadia Boulanger, Odón Alonso, Ros Marbá, Rafael Frühbeck de Burgos, and García Asensi, among others. In 1967 she joined the Compañía Lírica Amadeo Vives, directed by José Tamayo, performing at Summer Festivals in Madrid, Barcelona, and Seville, with the Antología de la Zarzuela for several years. She was later part of the Compañía del Teatro de la Zarzuela de Madrid.
