 The most famous recordings were by the Italian tenor Enrico Caruso; all of his recordings were made by the acoustical recording process before Victor began commercial electrical recording in 1925.There were a number of Victrola albums devoted to a single singer such as Caruso, Richard Crooks, Lawrence Tibbett, Rosa Ponselle, Ezio Pinza, John McCormack, Titta Ruffo, Amelita Galli-Curci, Louise Homer, Lauritz Melchior, and Kirsten Flagstad, as well as compilations devoted to the French, German, and Italian operas.Although these albums were released long before the advent of digital remastering, great care was taken to achieve the best possible sound through various electronic processes available in the 1960s and 1970s.