Spanish composer. Worked from 1555 to 1570 at the vice-regal court of the Duke of Alba in Naples. His publications consist of a volume of sacred music (hymns, Magnificats and motets) and a treatise of outstanding importance on viol playing, the Tratado de glosas sobre cláusulas y otros géneros de puntos en la música de violones of 1553. This is a noteworthy source of Renaissance ornamentation and improvisational practice, containing variations on stock basses, arrangements of madrigals where the viol plays ornamental figures to a keyboard accompaniment, cadential embellishments and so on. His techniques led to the English 'divisions on a ground' and the improvisatory, viola bastarda style.