Listen to Sleep Music Delta Waves: Relaxing Music to Help You Sleep & Deep Sleep online. Sleep Music Delta Waves: Relaxing Music to Help You Sleep & Deep Sleep is an English language song and is sung by Nature Sounds. Sleep Music Delta Waves: Relaxing Music to Help You Sleep & Deep Sleep, from the album Sleep Music Delta Waves: Relaxing Music to Help You Sleep & Deep Sleep, was released in the year 2017. The duration of the song is 44:57. Download English songs online from JioSaavn.