Listen to Tchaikovsky: Serenade for Strings, Op. 48: II. Waltz. Moderato online. Tchaikovsky: Serenade for Strings, Op. 48: II. Waltz. Moderato is an Unknown language song and is sung by Academy Of St Martin In The Fields and Sir Neville Marriner. Tchaikovsky: Serenade for Strings, Op. 48: II. Waltz. Moderato, from the album royalty core, was released in the year 2020. The duration of the song is 3:34. Download Unknown songs online from JioSaavn.