Listen to Soothing Frequency online. Soothing Frequency is an Instrumental language song and is sung by Brainwaves Mike. Soothing Frequency, from the album Brainwave Entrainment 2018 - Solfeggio Scales for Brainwave Sync, Music for your Brain, was released in the year 2018. The duration of the song is 4:40. Download Instrumental songs online from JioSaavn.