He joined the music magazine Música, which had important support from the official Spanish government.
Along with Rodolfo Halffter he suffered the bombing of Figueras, where he lost part of his work.
There he worked as musicologist and music critic in the journal Últimas Novedades and in the magazine Tiempo as well as in programming concerts.
One of his first writings was Silvestre Revueltas, su vida y su obra (Silvestre Revueltas, his life and work) was published in the magazine Hoy in Mexico City.
Música y músicos de Latinoamérica (Music and musicians of Latin America) became his most important work and is one of the leading source for Latin American music studies.