The description that Escolania de Montserrat's YouTube channel give in their description for this video is suitably modest:
Joan Cererols, monk of Montserrat Abbey (1618-1680).
Montserrat Abbey, 2008.
Not all that much is known about him and what little there is comes from Montserrat Abbey's own records. He entered the monastery as a boy, first as a choirboy and then as a novice and a monk. He was both a talented musician who played the organ, harp, violin and bass string instruments, and prolific a composer who excelled in composing music for different vocal groupings such solo voices combined with four part choirs and double choirs. He also wrote many Spanish villancicos which are characterised by lively and pleasing rhythms often in triple time. As well as being a musician and composer he was a talented Latin versifier and student of moral theology. He was held in such high regard by his fellow monks that for many years after his death they paid him a tribute unique in the history of Montserrat Abbey – of singing a responsory on the day of his anniversary. You'll find the video, text, and translation below the fold. Enjoy :-).