Written in 2010 for the Royal Liverpool Philharmonic, Wigglesworth's nine-minute work explores the idea of perpetuum mobile (continuous movement) in seven connected, miniature inventions. A regular pulse forms the work’s core, with elaborations of the central musical idea shifting constantly around it in jagged rhythms and sumptuous orchestration. The composer writes, "The seven sections can very briefly be described thus: 1) an active, miniature 'theme and variations'; 2) the juxtaposition of v...