"I was kind of a crusader for his music," said Laredo. From 1974 to 1981 followed Rachmaninoff's complete solo piano works on seven LPs for CBS Masterworks (reissued in 1993 by Sony Classical on five CDs), a project no pianist before had ever dared to undertake (at the same time the German-American pianist Michael Ponti also recorded the Scriabin and Rachmaninoff works). At this time she was a relative rarity as a female piano soloist, particularly in the technically demanding and muscular works of Rachmaninoff. There were only a few others – Gina Bachauer, Myra Hess and later Alicia de Larrocha, for example. The New York Daily News baptised her now “America's First Lady of the Piano”, an appellation which was later used by many others. Laredo initially disliked this as she felt it was sexist: she wanted to be known as a pianist, not a “woman pianist” Later she relented and used the title herself in her book and on her website. The preparations for the recording of Rachmaninoff's solo piano works proved to be very exhausting. Laredo said she now understood why some of the pieces had never been played by anybody: it was simply because they were so hard. Rachmaninoff, who was 6 feet 4 inches tall with correspondingly large hands, had composed many of his works for himself. One could only wonder how the tiny 5-foot-1-inch Laredo was able to play Rachmaninoff's pieces, some of which indulged in 11-key stretches. After practicing the music of “Rocky”, as she called Rachmaninoff, she had to get her hands massaged. Ruth Laredo also recorded more than 20 albums featuring works of other composers, among them Isaac Albéniz, Bach, Beethoven, Lili Boulanger, Brahms, Chopin, Falla, Debussy, Khachaturian, Fauré, Mozart, Poulenc, Ravel, Clara and Robert Schumann, Tchaikovsky as well as of the American composers Barber, Aaron Copland, Ives, Laderman, Kirchner, Rorem and Siegmeister. Especially acclaimed was the recording with James Tocco of Stravinsky's "The Rite of Spring" in the version for two pianos for Gasparo Records.