Castilla-Ávila studied guitar at Conservatorio Superior de Sevilla with J. Calero, at London College of Music with C. Bonell, at Guildhall School of Music with R. Brightmore, at Mozarteum University in Salzburg with I. Siewers and at Arizona State University with F. Koonce. He studied composition at Mozarteum under A. Hölszky and R. Febel and at Luxemburg Conservatoire under A. Müllenbac
Master classes from guitarists D. Russell, M. Barrueco, R. Dyens, etc. and from composers S. Sciarrino, D. Schnebel, C. Halffter, T. Marco, J. Kaipainen, J. Tiensuu, etc. He was teaching at Conservatorio Profesional de Ceuta and at Conservatorio Elemental de Lucena, both in Spain. And he was teaching at Arizona State University. He is an artistic advisor of the Microtonal Music Society in Austria, giving regular lectures at Reina Sofia in Madrid, St. Petersburg Conservatory, Guildhall School of Music in London, Yong Siew Toh Conservatory in Singapore, etc.
His music has been conducted by D. Russell-Davies, T. Ceccherini, J. Kalitzke, H. Lintu, A. Soriano, H. Schellenberger, etc. He has written solo and chamber music, orchestral, theatre plays, choreographies five chamber operas.
He has been awarded the Music Prize 2013 from the Region of Salzburg.
“Castilla-Ávila has to be counted to the most excellent artistic figures of our days”. Johannes Kotschy, former Chairman of the International Ekmelic Music Society in Austria.
“A very high degree of originality, he is always in search of new horizons”. Alexander Müllenbach, director of the Sommerakademie Mozarteum Salzburg.