shxde, Astral Planes, Hermei's 'Halcyon' came out on September 20, 2019. The duration of Halcyon is about two minutes long, specifically at 2:52. This song does not appear to have any foul language. Halcyon's duration is considered a little bit shorter than the average duration of a typical track. Because this song is the only song in Halcyon and no other songs are present in the album, we classify this track as a single. Based on our statistics, Halcyon's popularity is not that popular right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

Halcyon テンポ

We consider the tempo marking of Halcyon by shxde, Astral Planes, Hermei to be Allegro (fast, quick, and bright) because the track has a tempo of 145 テンポ, a half-time of 72テンポ, and a double-time of 290 テンポ. Based on that, the speed of the song's tempo is fast. Activities such as, jogging or cycling, can go well with this song. The time signature for this track is 4/4.

Halcyon キー

This song has a musical key of F♯ Major. This also means that this song has a camelot key of 2B. So, the perfect camelot match for 2B would be either 2B or 3A. While, 3B can give you a low energy boost. For moderate energy boost, you would use 11B and a high energy boost can either be 4B or 9B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 2A or 1B will give you a low energy drop, 5B would be a moderate one, and 12B or 7B would be a high energy drop. Lastly, 11A allows you to change the mood.