For years, Margarita Höhenrieder was searching for the authentic sound of Frédéric Chopin's piano works. Which instrument of its time most convincingly reflected Chopin's music? Chopin himself had given the answer in 1831: "Pleyel's instruments are the non plus ultra"!

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.

Cecilia Bartoli recreates the 1828 triumph of the legendary Maria Malibran - original star and dedicatee of Halévy's "tragi-comedy", Clari. Tracing the love of a callow country-girl for a duplicitous Duke, this hugely entertaining and first-ever modern production of Clari proved the overwhelming hit of the Zurich Opera season. Zurich Opera's own period-instrument orchestra, La Scintilla, under Adam Fischer, contribute a thoroughly researched, stylistically and historically well-informed accompaniment, yet without neglecting the liveliness and spirit of Italian opera.

‘Semele’ is presented in Robert Carsen’s stylish modern dress production, originally seen in London, and most recently staged at the Zurich Opera in 2007. The drama tells of the ambition of the beautiful mortal, Semele, who, not satisfied with being Jupiter’s mistress, strives with fatal results to supplant Jupiter’s wife, Juno. Conceived as an oratorio but nowadays presented as a stage drama, it is a superb vehicle for all the principals, not least the substantial title role, which includes such popular arias as ‘Endless pleasure’ and ‘Myself I shall adore’.