Listen to Sleep Through the Night (Relax) online. Sleep Through the Night (Relax) is an Unknown language song and is sung by Trouble Sleeping Music Universe. Sleep Through the Night (Relax), from the album Sleep Piano Music – Background Instrumental Piano, Calm Piano, Soothing Piano, Healing Music, New Age Piano, Therapy Music, Relaxing Piano, was released in the year 2015. The duration of the song is 5:17. Download Unknown songs online from JioSaavn.