Listen to Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18 - 2. Adagio sostenuto online. Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18 - 2. Adagio sostenuto is an Unknown language song and is sung by Valentina Lisitsa, London Symphony Orchestra and Michael Francis. Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18 - 2. Adagio sostenuto, from the album Inspiration: Rachmaninoff, was released in the year 2021. The duration of the song is 10:44. Download Unknown songs online from JioSaavn.