The overture to Rossini’s La scala di seta is a frequent and familiar concert piece – not so the opera itself.

Sir Mark Elder’s zest for exploring fresh territory with the forces of the Hallé is unquenched even in his final season as music director. And who better to introduce the Stabat Mater of Rossini – a late flowering of the operatic wizard’s powers – than he, a champion of the rich and rare from operas past?

Welcome back, WNO! Yes, emphatically, and with a loud hurrah, which is precisely what the company received, and rightly received, from the somewhat arbitrarily scattered first night Millennium Centre audience for their opening revival of The Barber of Seville.

Play it straight and you’ll get more laughs: that’s the standard advice on great operatic comedies like the masterpieces of the Gilbert & Sullivan canon, Britten’s Albert Herring, Verdi’s Falstaff, Puccini’s Gianni Schicchi. In comparison, for all its musical sparkle, Rossini’s Le Comte Ory may have amusing situations, but zero psychological insight into the characters, and plods along for the first half of Act One with very little intrinsic humour.

Harnessing the enthusiasm of youth has always been what Clonter Opera, on a farm in Cheshire, is about with its summer productions. The house is relatively small (there’s always a reduced orchestration as accompaniment), and the idea is that promising young voices can get a chance to try their luck with an audience and learn in the process.

The new Glyndebourne production of Rossini's Il turco in Italia has a truly winning smile on its face and a spring and a dance in its musical step. It is brimful of fun and good ideas, conveying the sense that a lot of joy has been had in its making. As one cast member tweeted during rehearsals a couple of weeks ago: "I have not stopped laughing and living my best life all day."

A crash, a scurry, a long, lilting serenade – the overture to Rossini’s Elizabeth I sounds oddly familiar. Not to worry. English Touring Opera has anticipated our confusion. “You may recognise this overture” flash the surtitles, to a ripple of laughter, before explaining that yes: this is essentially the same piece, originally composed in 1813 for Aureliano in Palmira that ended up attached to – of all things – The Barber of Seville.

Couperin: Les Nations Réunies & autres sonades La Simphonie du Marais/Hugo Reyne (Musiques à la Chabotterie)

You could probably guess from the assembling audience that the orchestra making its Barbican debut last night came from Milan. That many mink coats rarely congregate in a London concert hall.

It has long been a mystery why no new production of Semiramide should have been staged at Covent Garden since 1887: un offesa terribile considering that this splendid melodramma tragico should have been the inaugural production of the Royal Italian Opera House (our current theatre’s predecessor) in 1847.