"The Original Source" is a series of acclaimed albums, reissued on vinyl. Berlin's renowned Emil Berliner Studios has remastered four-track recordings from the 1970s, using its own advanced, 100% pure analog (AAA) techniques to create versions of the highest possible audio quality. Compared to the original releases, the sonic benefits are outstanding: greater clarity, more detail, and improved frequency response, less noise, less distortion, less compression, and the highest possible audio quality, allowing listeners to enjoy this repertoire like never before.

Of the many recordings of Giuseppe Verdi's Messa da Requiem, Herbert von Karajan's 1972 recording is among the most admired. Alongside the Berliner Philharmoniker and the Wiener Singverein, he is accompanied by Mirella Freni, Christa Ludwig, Carlo Cossutta, and Nicolai Ghiaurov, four of the finest Verdi interpreters of his time.