The first example in music history of the Theme and Variations form named Diferencias (Differences). Narváez wrote several diferencias: Diferencias sobre guárdame las vacas, Veintidós diferencias de Conde Claros para discantar, Otras tres diferencias hechas por otra parte.
Development of tonality. Their music offer an excellent example of the transition between modality and tonality.
Development of an instrumental style and creation of an important repertoire for vihuela and voice.