before you fall asleep made "Heart of Hearts" available on August 1, 2023. The duration of Heart of Hearts is about two minutes long, specifically at 2:12. This song does not appear to have any foul language. Heart of Hearts's duration is considered a little bit shorter than the average duration of a typical track. Because this song is the only song in Heart of Hearts and no other songs are present in the album, we classify this track as a single. In terms of popularity, Heart of Hearts is currently unknown. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

Heart of Hearts テンポ

We consider the tempo marking of Heart of Hearts by before you fall asleep to be Andante (at a walking pace) because the track has a tempo of 94 テンポ, a half-time of 47テンポ, and a double-time of 188 テンポ. Based on that, the speed of the song's tempo is slow. Activities such as, yoga or pilates, can go well with this song. The time signature for this track is 4/4.

Heart of Hearts キー

B Major is the music key of this track. This also means that this song has a camelot key of 1B. So, the perfect camelot match for 1B would be either 1B or 2A. While, 2B can give you a low energy boost. For moderate energy boost, you would use 10B and a high energy boost can either be 3B or 8B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 1A or 12B will give you a low energy drop, 4B would be a moderate one, and 11B or 6B would be a high energy drop. Lastly, 10A allows you to change the mood.