ABSTRACT. Duffy claims that choral music can offer an illuminative angle from which to examine music&039;s signification (it pairs music with sung or spoken text, offering its own independent, readily discernable meaning). Karna debates the three Regina Coeli settings of Mozart, placing them in their historical context and discussing factors that influenced their style, orchestration, and formal structure. Matta holds that Lopes-Graça&039;s choral music is a whole consisting of harmonizations of folk songs and original works.