"Hidden Heart" by Oh Junsung was released on September 22, 2015. The duration of Hidden Heart is about two minutes long, specifically at 2:29. This song does not appear to have any foul language. Hidden Heart's duration is considered a little bit shorter than the average duration of a typical track. There is only one song in 밤을 걷는 선비 (Original Television Soundtrack), so we believe that "Hidden Heart" is a single. Hidden Heart is below average in popularity right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

Hidden Heart テンポ

The tempo marking of Hidden Heart by Oh Junsung is Adagio (slowly with great expression), since this song has a tempo of 68 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.

Hidden Heart キー

This song has a musical key of D Major. This also means that this song has a camelot key of 10B. So, the perfect camelot match for 10B would be either 10B or 11A. While, 11B can give you a low energy boost. For moderate energy boost, you would use 7B and a high energy boost can either be 12B or 5B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 10A or 9B will give you a low energy drop, 1B would be a moderate one, and 8B or 3B would be a high energy drop. Lastly, 7A allows you to change the mood.