HARBOUR's 'Prolong' came out on August 4, 2017. With this song being around four minutes long, at 3:38, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. The track order of this song in HARBOUR's "Heatwave" album is number 6 out of 11. Prolong 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.

Prolong テンポ

We consider the tempo marking of Prolong by HARBOUR to be Andante (at a walking pace) because the track has a tempo of 77 テンポ, a half-time of 38テンポ, and a double-time of 154 テンポ. Based on that, the speed of the song's tempo is slow. The time signature for this track is 4/4.

Prolong キー

This song is in the music key of G Major. This also means that this song has a camelot key of 9B. So, the perfect camelot match for 9B would be either 9B or 10A. While, 10B can give you a low energy boost. For moderate energy boost, you would use 6B and a high energy boost can either be 11B or 4B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 9A or 8B will give you a low energy drop, 12B would be a moderate one, and 7B or 2B would be a high energy drop. Lastly, 6A allows you to change the mood.