Aleksandra Kurzak joined Vienna's Morphing Chamber Orchestra for a new album for Aparté - 'Mozart - Concertante'. The programme culminates in a performance of the great Sinfonia concertante for violin and viola, K364, but before that she sings a selection of arias that present many of the orchestra's players in solo roles. James Jolly caught up with the soprano by Zoom in Wrocław.