"Letter" by 615 had its release date on July 13, 2019. The duration of This song is about 3 minutes long, at 3:28. Based on our data, This song appears to be safe for all ages and is not considered explicit. This track is about the average length of a typical track. There is only one song in 1, so we believe that "Letter" is a single. In terms of popularity, Letter is currently not that popular. Although the overall vibe is very danceable, it does project more negative sounds.

Letter テンポ

The tempo marking of Letter by 615 is Moderato (at a moderate speed), since this song has a tempo of 112 テンポ. With that information, we can conclude that the song has a moderate tempo. The time signature for this track is 4/4.

Letter キー

B♭ Major is the music key of this track. This also means that this song has a camelot key of 6B. So, the perfect camelot match for 6B would be either 6B or 7A. While, 7B can give you a low energy boost. For moderate energy boost, you would use 3B and a high energy boost can either be 8B or 1B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 6A or 5B will give you a low energy drop, 9B would be a moderate one, and 4B or 11B would be a high energy drop. Lastly, 3A allows you to change the mood.