Listen to Rachmaninoff: Etudes-tableaux, Op. 39: No. 2 in A Minor. Lento assai (Excerpt) online. Rachmaninoff: Etudes-tableaux, Op. 39: No. 2 in A Minor. Lento assai (Excerpt) is an Unknown language song and is sung by Steven Osborne. Rachmaninoff: Etudes-tableaux, Op. 39: No. 2 in A Minor. Lento assai (Excerpt), from the album Helios Highlights: Volume I, was released in the year 2025. The duration of the song is 2:18. Download Unknown songs online from JioSaavn.