This volume contains the editorial notes on the 'Gurre-Lieder' score published in series A, volume 16, 1. Apart from a detailed description of the sources and critical notes, it provides a tabular list of errata, omissions and oversights in the musical text of the primary source. In addition, it contains a line-by-line comparison of the different texts and versions as well as a comparison of the subsequent amendments, tracing back to Schoenberg himself, to the primary source and all secondary sources included in the revision process.