RIU RIU CHIU is a centuries-old Spanish villancico, which was a poetic musical form in the 15th through 18th centuries. This performance of Beautiful Music features Ensemble Obsidienne, led by Emmanuel Bonnardot. You can also use the link below to read the lyrics in both Spanish and English.
https://lyricstranslate.com/en/r%C3%ADu-r%C3%ADu-ch%C3%ADu-riu-riu-chiu-riu-riu-chiu.html