A Producer's Note Before embarking upon these recordings of Mozart's complete duo music for piano and violin, my experience of many of these works was as a typical post-war listener. That is to say, these were sonatas for violin and these should be performed only one at a time, usually as a good way to limber up the bowing arm and lubricate the fingers before the serious recital 'material' began. The journey of a producer in such a project - apart from all the generic responsibilities of supervising the sessions, ensuring all the music is covered and choosing the 'takes' which constitute the final product - involves regularly questioning the underlying motivation for wanting to communicate these pieces in a certain way. Both Gary Cooper and Rachel Podger have discovered a particular essence in this music, which has illuminated our understanding of the genre in Mozart's hands. For this reason, this is a radical series. For some, it may lack a tradition of the kind of structured and cultured elan which Szymon Goldberg and Radu Lupu perpetuated (produced by that wonderful Decca doyen of the dark art, Christopher Raeburn) but for others it will lift the dialogue and characterisation onto new and irradiating levels. Of course, each volume has its own narrative and how brilliantly Gary has managed to programme early (some very early!), middle and late sonatas in ways which allow one to understand Mozart's various ploys and distinctive ambitions in this music. In an ideally balanced oeuvre, one wishes there were another three big mid-to-late works. Yet what this series has done is highlight the care Mozart took in the refinement of sonatas or variations 'to order'- a touching insight into awareness of capability, perhaps individual characters of performers, and that delectable turn of domestic tenderness which these pieces often exhibit. These two players bring these intimacies to bear wonderfully and, as producer, I had great fun working with them to find the shifting moods in music whose unpretentiousness belies the supreme quality of most of these works. Indeed, some of the sonata are far greater than I had imagined. If the piano sonatas (well, say the last ten) draw upon microcosms of allusion and reference to fellow instruments and their idioms (serenades and the like), then these 'high end' piano-violin sonatas take trips which almost exceed their bounds - think of those great long adagios. So, my lasting impression, having dissected every note of the music, is of a cornucopia of hidden gems; hidden because history has under-rated, misunderstood and bowdlerized the collective meaning of these works by assuming that it is an uneven genre - but then so are the symphonies and even the operas! Finally, one asks why there hasn't previously been a complete recording on historical instruments. From my 'privileged' position as listener-in-chief, I can tell you it is because no pair can make such transparent and difficult music sound so effortless, elegant, witty, emotionally persuasive and enjoyable.