말할 수 없는 비밀

말할 수 없는 비밀 is a somber song by The Piano Forest 피아노의 숲 with a tempo of 207 BPM. It can also be used half-time at 104 BPM. The track runs 1 minute and 28 seconds long with a C key and a major mode. It has low energy and is not very danceable with a time signature of 4 beats per bar .