The c/o chamber orchestra is a collective of thirty young musicians from a dozen different countries. Playing without a conductor, the orchestra is dedicated to that particular collaborative process which is the essence of chamber music. For their first album, the members have chosen to highlight a genre more difficult to pin-point than one might think. Its very name, divertimento, implies that it is simply a diversion, light music for entertainment – but many of the best-known examples of the form transcend that definition. And as many composers have learned, even light-hearted music should be taken seriously: humor requires a master’s touch. The four works recorded here offer different perspectives on the genre, starting with Ibert’s seven-movement suite in which the composer constantly plays with the listener’s expectations. Some forty years before Ibert, his compatriot Émile Bernard composed a very different Divertissement. It is scored for double wind quintet, reminiscent of Mozart’s divertimenti and serenades for winds. But even though the music is melodious and carefree, the debt owed by Bernard to the German romantic composers is never far from the surface. A very special case is Bartók’s Divertimento for strings, composed just before the outbreak of World War II. The closing work on the album reunites the winds and strings of the c/o orchestra in a work written especially for this project by the American composer Michael Ippolito, who in his Divertimento pays full tribute to the contrast-rich nature of the genre.

The works on this recording were written at various periods in Claude Debussy’s life, and reflect different aspects of him: from a young man stylistically unsure of himself to the confident maître, from a jobbing composer struggling to fulfill sometimes incongruous commissions to a man worn down by illness and outer events.

The disc opens with Printemps – a work originally for choir, piano and orchestra written in 1887 during Debussy’s stay in Italy as a winner of the Prix de Rome, but only published 25 years later in an orchestration made by Henri Büsser under the composer’s supervision. Three of the works that follow were commissions – the Rapsodie from a lady saxophonist, the Marche écossaise from an American general of Scottish descent and the Deux Dances from the instrument-maker Pleyel wanting to market a new model for a chromatic harp.

Chronologically the last work on the program, Berceuse héroique is Debussy's contribution to a tribute to the king of Belgium at the beginning of the Great War. Having rejected the idea of writing a heroic march in the safety of his own home he instead opted for a lullaby for piano, which he orchestrated the following year.

The closing work on the disc, however, is Nocturnes, for which Debussy borrowed the title from a series of atmospheric paintings by James Whistler. Made up of three equally atmospheric movements, it is today one of Debussy’s best-loved compositions for orchestra.

Nocturnes also forms the end of a trilogy of Debussy albums from the Singapore Symphony Orchestra and Lan Shui. Critical acclaim for the team range from ‘superb’ (BBC Music Magazine, about La mer) and ‘unquestionably world-class’ (Klassik-Heute.de, about the orchestra) to ‘a magnificent disc’ – the French magazine Classica’s verdict on the three ballet scores Jeux, Khamma and La Boîte à joujoux.

Ever since his very first disc, released by BIS some thirty years ago, Hakan Hardenberger has earned recognition for his performances of the classical repertory, but also as a pioneer of significant and vituosic new music for the trumpet. Collaborations with composers such as Takemitsu, Part, Henze, and H.K. Gruber have resulted in numerous works, of which the two recorded here are among the more recent. Brett Dean's concerto Dramatis personae is named after the term used for the list of characters in a stage work, and casts the soloist in the role of the ''Hero''. Dean's protagonist is a complex one, however, with traits inspired by comic book super heros as well as the classical flawed heros of literature and legend: ''Soliloquy'', the second movement, is a reference to Hamlet, while Charlie Chaplin's character in Modern Times has inspired the work's finale, ''The Accidental Revolutionary''. If there is a hero in the concerto by Luca Francesconi, it is Miles Davis. In his comment sto the work, Francesconi talks of Davis as ''a musician who transcends all labels'' with ''a delicate, cracked sound'' and a voice which speaks directly to the listener. Hard Pace, the title of Francesconi's work, is an allusion to a difficult journey, but it is also a conflation of the names of the performers for whom it was written: Hardenberger, Antonio Pappano and the Santa Cecilia Orchestra. On the present recording it is the Gothenburg Symphony and conductor John Storgards who provide Hakan Hardenberger with expert support in these demanding and rewarding scores.

Two of Sweden's most highly respected musicians, each in their own field, join forces on this very special disc. Classical violinist Cecilia Zilliacus has won acclaim for her recordings in magazines such as The Strad and Gramophone (Editor’s Choice), and folk musician Lena Willemark is a fixture on the Scandinavian folk and world music scene. The two open their highly original programme with Bach’s Partita in D minor in a version for voice and violin. This duo version is based on the research of the musicologist Helga Thoene, who has proposed that the celebrated Chaconne which closes the partita was written in response to the death of the composer’s first wife. Woven into Bach’s violin part are numerous quotations from various chorales, from which Willemark has devised a vocal part which she performs drawing on the strong tradition of chorale singing in Swedish folk music. Together with Cecilia Zilliacus’s violin, the clear attacks and straight-toned and direct style of singing form a final farewell, by turns dramatic and serene, to a loved companion. In order to expand their common repertoire, the two musicians approached the composer Sven-David Sandström in 2011. The result was Dansa (‘Dance’), a scene in seven sections to a text by the poet Maria Wine. Having collaborated previously with both performers, Sandström includes improvisatory passages and provides rich opportunities for the folk musician Lena Willemark to make her imprint on the music, including asking her to change over to the fiddle in one of the sections. Between these two works Cecilia Zilliacus performs a solo sonata written for her by Svante Henryson. In the course of seven movements the piece reflects the versatility of its composer, with a background in jazz, classical music and heavy metal, and allows Zilliacus to display the many facets of her own musicianship.