Listen to Swan Lake, Op. 20: Introduction online. Swan Lake, Op. 20: Introduction is an Instrumental language song and is sung by Evgeny Svetlanov and Ussr State Symphony Orchestra. Swan Lake, Op. 20: Introduction, from the album Tchaikovsky: Ballets, was released in the year 2011. The duration of the song is 3:16. Download Instrumental songs online from JioSaavn.