Listen to Cradle Song, Op. 49 No. 4 online. Cradle Song, Op. 49 No. 4 is an English language song and is sung by Classical Sleep Music. Cradle Song, Op. 49 No. 4, from the album Sleep with Classical Music, was released in the year 2015. The duration of the song is 2:12. Download English songs online from JioSaavn.