CSO eNotes is the new and easy way to view program books for concerts of the Chicago Symphony Orchestra, consistently hailed as one of the greatest orchestras in the world. CSO concerts are led by preeminent conductor and CSO music director Riccardo Muti, as well as other internationally known guest conductors. Notes for CSO concerts are written by Phillip Huscher, a respected writer, music historian, and former critic who has been the program annotator for the Orchestra since 1987.

The app also includes program books for other performances presented by the Chicago Symphony Orchestra Association (CSOA): the Chicago Symphony Chorus, the Civic Orchestra of Chicago, and guest artists and visiting ensembles of different musical genres—classical, jazz, pop, world, and contemporary—that the CSOA offers through its Symphony Center Presents series.

CSO eNotes provides a dynamic, digital version of all the editorial features of the CSOA's printed program books: engaging and expertly written notes about the music, in-depth biographies of performers, snapshot profiles of CSO musicians, and feature articles on a wide range of musical topics, as well as the CSOA's innovative family, community, and education programs.