Listen to Canticle. Adeste fideles. Mode IV online. Canticle. Adeste fideles. Mode IV is an Unknown language song and is sung by Moines de Santo Domingo de Silos. Canticle. Adeste fideles. Mode IV, from the album Noël à Silos, was released in the year 2003. The duration of the song is 2:38. Download Unknown songs online from JioSaavn.