Airvarick's 'Letter 4' came out on August 7, 2022. The duration of Letter 4 is about two minutes long, specifically at 2:04. This song does not appear to have any foul language. Letter 4's duration is considered a little bit shorter than the average duration of a typical track. Because this song is the only song in Letter 4 and no other songs are present in the album, we classify this track as a single. Based on our statistics, Letter 4'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.

Letter 4 テンポ

We consider the tempo marking of Letter 4 by Airvarick to be Allegro (fast, quick, and bright) because the track has a tempo of 128 テンポ, a half-time of 64テンポ, and a double-time of 256 テンポ. Based on that, the speed of the song's tempo is fast. Activities such as, walking, can go well with this song. The time signature for this track is 4/4.

Letter 4 キー

A Major is the music key of this track. This also means that this song has a camelot key of 11B. So, the perfect camelot match for 11B would be either 11B or 12A. While, 12B can give you a low energy boost. For moderate energy boost, you would use 8B and a high energy boost can either be 1B or 6B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 11A or 10B will give you a low energy drop, 2B would be a moderate one, and 9B or 4B would be a high energy drop. Lastly, 8A allows you to change the mood.