Franco-Flemish composer. Served the widowed Spanish Queen Mary of Hungary in Brussels and Spain, and in 1564 entered the service of Archduke Ferdinand in Prague and Innsbruck, where he became vice-Kapellmeister in 1580. His publications of church music, including Masses, motets and penitential psalms, and of German songs, are noteworthy for the very careful notation of accidentals; he was one of the first composers to use the natural sign to contradict an earlier sharp or flat.