"Heart of the City" by Valentine was released on May 12, 2021. Heart of the City is about six minutes long, preciously at 6:17, making this song fairly long compared to other songs. Because this song is the only song in Heart of the City and no other songs are present in the album, we classify this track as a single. In terms of popularity, Heart of the City is currently not that popular. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

Heart of the City テンポ

We consider the tempo marking of Heart of the City by Valentine to be Andante (at a walking pace) because the track has a tempo of 90 テンポ, a half-time of 45テンポ, and a double-time of 180 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 the City キー

The music key of this track is 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.