The DORMEME project investigates how early modern owners, readers, and users engaged with printed polyphonic music books, focusing on 1500–1545, when music printing introduced new modes of circulation alongside manuscript and oral transmission. This technological shift expanded and reshaped how individuals interacted with music books—as tools for performance and teaching, as collectable objects, and as sites of confessional negotiation. Our project undertakes a copy-based survey of surviving printed polyphonic books across European and North American collections, documenting marks of use and developing case studies that reveal how these books were used, altered, and understood.

This paper presents the project’s first synthetic results. We outline a taxonomy of interventions—textual, musical, material, and paratextual—and consider them in relation to user motivations such as correction, performance facilitation, confessional adaptation, education, personalisation, and proof-reading. Drawing on detailed examples, we examine textual changes in religious motets, musical annotations including crosses, numbers, custodes, and barline-like dashes, and patterns of personalisation that illuminate different types of owners and users. We also address the distinctive role of the proof-reader as the “first reader,” whose interventions bridge production and use. Together, these findings show how annotations can reshape our understanding of early modern musical practice and book culture.