Listen to Delta Waves For Deep Sleep online. Delta Waves For Deep Sleep is an Instrumental language song and is sung by The Solfeggio Peace Orchestra. Delta Waves For Deep Sleep, from the album Solfeggio: Healing Frequencies, 528hz, Delta Waves For Deep Sleep, was released in the year 2022. The duration of the song is 2:18. Download Instrumental songs online from JioSaavn.