Lukas Ligetis groundbreaking early work Pattern Transformation, for four players on two marimbas, was inspired by the complex metric structures of Baganda court music from Uganda. A fast fundamental pulse underpins the piece, where different musicians feel the beat at different moments, creating a mesmerising, three-dimensional landscape of endless polyrhythmic possibilities. Initially considered impossible to perform before being championed by the Amadinda Percussion Group, this thrilling five-minute piece marks the beginning of the composers lifelong fascination with polymetrics. A dynamic addition to the contemporary repertoire, ideal for advanced percussion ensembles seeking a masterclass in rhythmic interplay.