Listen to Alpha Wave Biofeedback Machine online. Alpha Wave Biofeedback Machine is an Instrumental language song and is sung by Calm Music Guru. Alpha Wave Biofeedback Machine, from the album Alpha Wave Biofeedback Machine - Relaxing Yoga Music for your Mind, was released in the year 2020. The duration of the song is 4:37. Download Instrumental songs online from JioSaavn.