He has made well over 100 recordings, most of which are full-length operas, often recording the same role more than once. Among these recordings is a boxed set of every tenor aria Verdi ever wrote, including several rarely performed versions, in different languages from the original operas, which Verdi wrote for specific performances.
In August 2005, EMI Classics released a new studio recording of Richard Wagner’s Tristan und Isolde in which Domingo sings the title role of Tristan. A review of this recording, headlined “Vocal perfections”, that appeared in the 8 August 2005 issue of The Economist begins with the word “Monumental” and ends with the words, “a musical lyricism and a sexual passion that make the cost and the effort entirely worthwhile”. It characterized his July 2005 performance of Siegmund in Wagner’s Die Walküre at Covent Garden as “unforgettable” and “luminous”. The review also remarks that Domingo is still taking on roles that he has not previously performed.
Recordings that were released in 2006 include studio recordings of Puccini’s Edgar, Isaac Albéniz’s Pepita Jiménez, as well as a selection of Italian and Neapolitan songs, titled Italia ti amo (all three with Deutsche Grammophon). Domingo appeared as the star act in the New Orleans Opera Association’s A Night For New Orleans with Frederica von Stade and Elizabeth Futral, in March 2006. The concert was to raise funds for the rebuilding of the city.