Ibragimova/Tiberghien (BIS) Violinist Alina Ibragimova and pianist Cédric Tiberghien, on period instruments, offer zest-filled and elegant readings of four Beethoven sonatas Alina Ibragimova and Cédric Tiberghien get their Beethoven cycle off to a flying start with zesty accounts of the Op 12 set alongside the evergreen Spring Sonata. They perform on period instruments – she, a 1570 Amati violin; he, a replica 1794 Walter fortepiano – but there’s nothing academic about these fresh-as-a-daisy int