Roumanova was called "a brilliant pianist and a most interesting composer" when she relocated to the United States in 1918. While in Los Angeles, she gave concerts,"Beckers in Los Angeles" Musical America (April 10, 1920): 36. sometimes featuring her own compositions, and accompanied others in recital."Mrs. Dreyfus on Coast" Musical America (May 14, 1921): 46."Grace Wood Jess Charms in Folk Song Program" Musical Courier (February 19, 1920): 42. She also appeared in the 1922 silent film adaptation of the Rubaiyat,"Art Notables in Rubaiyat" Los Angeles Sunday Times (August 7, 1921): 36. via Newspapers.com and taught piano students in her studio."Russian Composer-Pianist" Los Angeles Times (September 28, 1919): 57. via Newspapers.com
