Listen to Fall Asleep Fast - 4Hz Sleep Frequencies for a Calm Mind (Theta Brain Waves) online. Fall Asleep Fast - 4Hz Sleep Frequencies for a Calm Mind (Theta Brain Waves) is an Instrumental language song and is sung by Jack Vuterin. Fall Asleep Fast - 4Hz Sleep Frequencies for a Calm Mind (Theta Brain Waves), from the album Fall Asleep Fast - 4Hz Sleep Frequencies for a Calm Mind (Theta Brain Waves), was released in the year 2025. The duration of the song is 2:16. Download Instrumental songs online from JioSaavn.