Once I know this, I can track down the exact guide you need. Tesi_Cerulo_2022 2 - AMS Dottorato
It is highly likely that this term refers to a specialized, niche, or local application, or a misunderstanding of a title in a foreign language (likely Italian, meaning "Musical Paradise Reader"). Lettore paradiso musicale 1.3.2
It might be a small, regional Italian project focused on digitizing local music. Once I know this, I can track down the exact guide you need
However, the phrase "Lettore" (Reader/Player) and "Musicale" (Musical) in an Italian context often appears in academic or archival materials. Once I know this
It could be a cataloging code or specific software used within an archive (such as the Einaudi or Garzanti archives mentioned in search results) to index music or letters, similar to the tools used in Italian literary studies, such as the ICCU cataloging rules.
Used to analyze work in progress within literary archives.