Balsam and Shumsky have rather contrasting personalities: the pianist is so much used to taking a supportive role that he only makes very mild forays into playing assertively. Shumsky, on the other hand, whilst also being a very experienced chamber player, has a stronger personality, and yet is able to restrain this to suit Balsam's style. And what style Balsam has in this repertoire! The ornamentation is so finely integrated into the passagework that the music achieves a truly impressive fluency. Even when the duo are at their less inspired, as in the first movements of K306 and 378, the standard of playing is sufficiently high to command authority.