Anna Case (October 29, 1888 – January 7, 1984) was an American soprano. She recorded with Thomas Alva Edison, who used her voice extensively in "tone tests" of whether a live audience could tell the difference between the actual singer and a recording. She also made recordings for Diamond Records, RCA Victor, Vitaphone, and Columbia Records.
^"American Premiere of 'Boris Godounoff' Wednesday". The New York Times. March 12, 1913. Retrieved 2011-03-09. "Boris Godounoff, the Russian opera by Moussorgsky, will be the feature of next week's repertoire at the Metropolitan Opera House, where it will have its first American hearing on Wednesday evening. It will be conducted by Mr. Toscanini, and the cast will include Madames Homer, Case, Sparkes, Maubourg, and Duchene, and Messrs. Didur, Althouse, Rothier, Reiss, Bada, De Segurola, Rossi, Audisi, Reschiglian, and Kreidler."