Like the Offices of his contemporary Hucbald, Stephen's compositions follow the eight modes,[1] though the musicologist Yves Chartier does not consider this innovation, asserting that both composers "did no more than to apply openly a manner of composition that was prevalent in their milieu.
Following his education, Stephen attained numerous church posts: he became an abbot of St Evre, St Mihiel and Lobbes as well as a canon of Metz Cathedral.
He was elected bishop of Liège in 901, holding the post until his death in Liége on 16 May 920.
[1] His works include In Festi Sanctisissimae Trinitatis, an office for the feast of the Trinity.
The celebration of the Feast of the Holy Trinity is attributed to him.