Listen to Rachmaninoff: Piano Concerto No. 3 in D minor, Op. 30: 1. Allegro ma non tanto online. Rachmaninoff: Piano Concerto No. 3 in D minor, Op. 30: 1. Allegro ma non tanto is an Unknown language song and is sung by Martha Argerich, Radio-Symphonie-Orchester Berlin and Riccardo Chailly. Rachmaninoff: Piano Concerto No. 3 in D minor, Op. 30: 1. Allegro ma non tanto, from the album 100 Classical Favourites, was released in the year 2003. The duration of the song is 1:41. Download Unknown songs online from JioSaavn.