If there were nothing notable about it, New England Conservatory Opera’s upcoming production of Rossini’s “La Gazzetta” would still be a significant event. The 1816 comic opera is virtually unknown, despite the fact that it was composed between two of Rossini’s masterpieces, “Il Barbiere di Siviglia” and “La Cenerentola.”
But the production has much more going for it. It is the US premiere of the critical edition of the opera, published in 2002. Even more notable, it will include what is in all likelihood the world premiere of an Act 1 vocal quintet that was discovered only in 2011. Audience members will, for the first time, be able to hear “La Gazzetta” in its complete form.