In 1599 he was selected to accompany Melchior Borchgrevinck and two other Danish court musicians to study with Giovanni Gabrieli in Venice, returning to Denmark in 1600.
In 1605, Pedersøn undertook a further longer trip to study with Gabrieli with the support of King Christian, remaining in Venice for four years.
[4][5] Pedersøn was appointed assistant director of the Danish royal chapel (under Borchgrevinck) in 1618—the first Danish-born musician and composer to reach such a position.
[4] In 1620, Pedersøn made a significant contribution to Danish church music with the publication of Pratum spirituale.
It includes six entirely original compositions, in an early Baroque style: a Danish language mass, two sets of responses, and three Latin motets.