This recording of La Sonnambula is notable on a number of fronts. It's the first recording of the opera based on a 2004 critical edition of the score that confirms the leading role was indeed written for a mezzo-soprano, although it has been performed by sopranos for much of its history. (Among the first Aminas were the celebrated mezzos Giuditta Pasta and Maria Malibran.) It's also the first recording using period instruments, in this case Orchestra La Scintilla, based at the Basel Opera and conducted by Alessandro de Marchi in an idiomatic and lively reading. And, as the promotional materials trumpet, it's the first recorded collaboration between superstars Cecilia Bartoli and Juan Diego Flórez. Although less hoopla is made of him, the recording also features a superbly lyrical performance by baritone Ildebrando D'Arcangelo.