He toured as a pianist and was known as a composer and arranger of popular Spanish folk music. Nin was a member of the Real Academia de Bellas Artes de San Fernando of Madrid and the French Legion of Honor.
As a musician, he toured as a pianist and was renowned for his compositions and arrangements of traditional Spanish folk tunes. He held membership in both the Real Academia de Bellas Artes de San Fernando in Madrid and the French Legion of Honor.