Óscar Candendo Zabala (San Sebastián) obtained the degree of Superior Professor in the specialties of Organ, Harpsichord, Piano, and Chamber Music.

He studied Organ at the conservatories of Bayonne and Pau with Bernadette Carrau and Jesús Martín Moro, and continued his learning at the Ecole d'Etudes Musicales Supérieure in Toulouse with Michel Bouvard and Jan Willem Jansen as permanent teachers, as well as several guest maestros including: J. Boyer, L. Lohmann, J. P. Leguay, S. Szathmáry, and D. Moroney, among others.

He completed his education in Barcelona with Montserrat Torrent, and with Bernhard Haas at the Staatliche Hochschule für Musik und Darstellende Kunst in Stuttgart.

He is a co-author, along with Françoise Clastier, of a study titled "Órganos Franceses en el País Vasco y Navarra (1850-1925)" published by the Sociedad de Estudios Vascos-Eusko Ikaskuntza: Cuadernos de Sección (Música) 7, 1994.

In 1992, he won the First Prize in the Permanent Competition of Juventudes Musicales held in Seville. The following year, he was awarded the Andrés Segovia Prize and the J. M. Ruiz Morales Prize at the XXXVI International University Course of Santiago de Compostela.

He is a Professor of Organ at the Escola Superior de Música de Catalunya (ESMUC) and serves as the titular organist of the Buen Pastor cathedral in San Sebastián, as well as the organist of the Easo Choir in the same city. In addition to his teaching activities, he maintains an intense concert schedule.