★★★★★ ‘They’re both electrifying, and they sound absolutely magnificent... Pappano makes sure [the Fourth] sings as often as it can... This is a terrible beauty, energetic, Satanic, utterly spellbinding, keeping enough in reserve to make the biggest climaxes truly shattering... The opening bars of this Sixth, a cry of anguish that’s also passionate bel canto song, promise the very best recording of the work.’