Given his regular commitment to working with period-instrument orchestras, Simon Rattle's Berlioz with the Berlin Philharmonic might have been expected to show some evidence of those historical explorations. Few mid-19th-century composers gain more from the use of period wind instruments and gut strings than Berlioz - the extra rawness and edge to the soundworld seem consistent with the composer's efforts to expand the boundaries of what the early Romantic symphony could encompass. But this is a plush, silky-smooth reading, with the Berlin sound at its most opulent and refined. Until Rattle finally gives the orchestra its head in the closing pages, the performance has a Karajan-like svelteness, and the accompaniment to Susan Graham's exquisitely shaped account of the Cleopatra cantata is equally well-mannered, though gorgeous in its way and perhaps not to everyone's taste.