The repertoire files of the late Dr. Barbara Doscher, in which she noted her tips, observations on each particular piece, and notes on how to best teach it, comprise a unique trove of wisdom unmatched by any other source. Laboriously transcribed and annotated by John Nix, one of Doscher's students, the notes are presented here as a companion volume to her best-selling text, The Functional Unity of the Singing Voice.