Fiammetta Tarli and Ivo Varbanov perform Harrison Birtwistle’s Harrison Clocks I and IV (Fiammetta Tarli, solo), George Benjamin’s Piano Figures (Ivo Varbanov, solo), Silvina Milstein’s In a bowl of grey-blue leaves, and Rob Keeley’s Fiestas (Fiammetta Tarli and Ivo Varbanov, two pianos).