This is the fourth instalment in Deutsche Grammophon’s new Mozart cycle. In the end this will encompass the seven great operas, from Idomeneo forwards. I haven’t heard the previous three, but from the reviews I have seen the reception has been rather mixed. Concerning this latest issue I am also in two minds. The problem, as I see it, is that Nézet-Séguin hasn’t quite decided what he is up to. He has the excellent Chamber Orchestra of Europe at his disposal.