That would be Harry Partch’s Delusion of the Fury. “For many years there was essentially only one set of instruments” – the ones the composer built himself – “capable of playing Mr. Partch’s largest works, which meant the pieces were rarely performed. But a few years ago Ensemble Musikfabrik, the German contemporary music group, decided to revive … Delusion of the Fury, and turned to Thomas Meixner, a percussionist and instrument maker, to build a new set of Partch instruments.”