In late 2008 and 2009 Cahill developed and performed a new project known under two titles, A Sweeter Music, and Notes on the War: The Piano Protests, where she asked composers for piano music on the subject of peace. The second title was printed in "The New York Times", but was not Cahill's original title. Commissioned composers include Preben Antonsen, Michael Byron, Paul Dresher, Ingram Marshall, Jerome Kitzke, Mamoru Fujieda, Kyle Gann, Peter Garland, Phil Kline, Jerome Kitzke, Meredith Monk, Pauline Oliveros, Yoko Ono, Larry Polansky, Bernice Johnson Reagon, The Residents, Terry Riley, Frederic Rzewski and Carl Stone. In later performances of A Sweeter Music, Cahill's spouse John Sanborn contributed video content to accompany the music, displayed across three screens and synchronized music.