Published online by Cambridge University Press: 12 August 2013
György Ligeti has stated that his micropolyphonic compositions were ‘governed by rules as strict as Palestrina's’ (Ligeti 1983, 14); some of these rules are preserved directly in his sketches and others can be derived from the compositions themselves. This article discusses the artistic context in which Ligeti developed systems of rules for individual compositions, and investigates in depth the composer's rules for the organization of pitch and rhythm in two of his seminal works from the 1960s, transmitting the explicit rules for pitch in sketches for the ‘De die judicii’ movement of the Requiem and uncovering implicit rules for rhythm in Lux aeterna. By examining both the rules and their application in composition, with the exceptions that arise therein, we come to a better understanding of the aesthetic goals Ligeti's rules were devised to meet, and the balance of stricture and freedom that was essential to the composer's persona.