Traditional singers who sang in stately homes tended to sing in a Welsh language that had strict rules about metre, rhyme, and acceleration.
The poets wrote verse of an occasional nature, praising the exploits and virtues of their patrons: the Welsh nobility and high-ranking clergy.
They also provided elegies, devotional poetry, commemorated the generous acts of their patrons and satirised certain people in verses which might have the intensity of curses.
In descending social order came: poet, harper, crwth player and the specialised singer of bardic verse, the datgeiniad.
The crafts of poetry and instrumental music were interdependent and the performance of a new poem, at its most splendid, probably required the services of the datgeiniad, harpist and/or crwth player; no doubt superintended by the poet.