The Orquesta Sinfónica de Castilla y León, one of the major Spanish symphony orchestras, commissioned Òscar to write an orchestral piece for the orchestra’s 2014-2015 season. Entfaltung opened a concert including Brahms’ Violin Concerto op.77, featuring soloist Vilde Frang, and Prokofiev’s Romeo and Juliet, conducted by Jaime Martin.

Agustín Achúcarro – El Diario De Valladolid-El Mundo:

The Orquesta Sinfónica de Castilla y León scored two points with the premiere of a new work by Oscar Colomina and the presence of the violinist Vilde Frang. With the first they acknowledged the music of our time and the urgent need for the audience to get to know it. Entfaltung by Oscar Colomina Bosch turned out to be a very well structured work […] What we heard made evident the facility of the composer to orchestrate: willingly dark, enigmatic interventions of the brass were interspersed amongst a balanced distribution of striking and subtle passages. The calls in the winds, a certain suspense, and a reference to the earth’s pulse, emerged surprisingly in a clear piece that vanishes on the sound of the viola.”