I believe that this is a monophonic recording. Most likely from the 1940's or 1950's. My guess is either Russian Philharmonic or some other Eastern Bloc state orchestra. The quality of the recording equipment is what is negatively affecting the overall quality of the piece. The piece and execution are both outstanding. Think of this as the difference between a live performance, and listening on a cassette tape from 1965.
Hermoso tema, en particular toda la música clásica en todas las formas y de todos sus compositores es muy especial, lo transporta a un mundo de tranquilidad que es sencillamente ¡espectacular! Felicitaciones.