the operamaniacs.com upload post that came with the files (Attila - Ghiuselev Dimitrova Saccomani Kaludov - Sofia84.htm, in the rip folder), posted 28 Feb 2004 by the person who taped the Euroclassic Notturno relay: "Nikola Ghiuselev (Attila), Lorenzo Sacomani (Ezio), Ghena Dimitrpova (Odabella), Kaludi Kaludov (Foresto), Boris Bogdanov (Uldino), Emil Ponorski (Leone), Orchestra and Chorus of Sofia Opera, Vladimir Guyaurov (conductor) (recorded 25 May 1984)"; the same page carries the forum broadcast calendar entry "Verdi ATTILA (Sofia 25 May 1984)" for the relay.

Migration: a zero year, month, day or OperaClass id meant the value was unknown, not that it was zero. Set to null.

Top billing: Attila is the title role and was not billed, while four of five portrayals were. Source for the cast: the operamaniacs.com upload post in the rip folder (Attila - Ghiuselev Dimitrova Saccomani Kaludov - Sofia84.htm), which names Ghiuselev as Attila. Set to the three leads Attila / Ezio / Odabella, matching the sibling Sofia recording 5880 and Napoli 8093.

Top billing: exactly three roles carry noted, and Attila (the title role) had to be added, so Foresto comes off. Source: the operamaniacs.com upload post in the rip folder.