Complex sentence: Schmitt performed as a member of various ensembles in the 1970s, but then settled in Strasbourg and left the professional circuit for a time, he began releasing albums under his own name in 2000.
Split into simpler sentences: Schmitt performed as a member of various ensembles in the 1970s. Then he settled in Strasbourg and left the professional circuit for a time, releasing solo albums in 2000.