Listen to 心の安定 (174hz) online. 心の安定 (174hz) is an Unknown language song and is sung by ソルフェジオ俱楽部. 心の安定 (174hz), from the album ソルフェジオ周波数 / 全集 (Vol.1), was released in the year 2021. The duration of the song is 5:33. Download Unknown songs online from JioSaavn.