Arranging chamber music for a variety of instrumental ensembles was a widespread practice in the eighteenth century. Bach himself seems to have created a number of works that did not necessarily require the use of a specific instrument. Here Julien Martin and Olivier Fortin, musical partners for many years, present the Sonata in F major, originally written for transverse flute and continuo, transcriptions of the Trio Sonata for organ No. 3 in E minor, the Partita for violin No. 2 in G minor, and the Chorale 'Nun komm, der Heiden Heiland', whose extensive ornamental flourishes elongate and transform the chorale melody to the point of rendering it unrecognisable.