Listen to Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato online. Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato is an Unknown language song and is sung by Sviatoslav Richter, Warsaw National Philharmonic Orchestra and Stanislaw Wislocki. Rachmaninoff: Piano Concerto No. 2 in C Minor, Op. 18: I. Moderato, from the album 100 Piano Masterworks, was released in the year 2017. The duration of the song is 11:11. Download Unknown songs online from JioSaavn.