Emerald's 'Letters' came out on December 1, 2021. With this song being about 5 minutes long, at 4:34, "Letters" by Emerald is fairly a long song compared to the average song length. This song does not have an "Explicit" tag, making it safe for all ages. Because this song is the only song in Letters and no other songs are present in the album, we classify this track as a single. On top of that, Japan appears to be the country where this track was created. The popularity of Letters is currently 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.

Letters テンポ

We consider the tempo marking of Letters by Emerald to be Vivace (lively and fast) because the track has a tempo of 172 テンポ, a half-time of 86テンポ, and a double-time of 344 テンポ. Based on that, the speed of the song's tempo is fast. The time signature for this track is 4/4.

Letters キー

E Minor is the music key of this track. Because this track belongs in the E Minor key, the camelot key is 9A. So, the perfect camelot match for 9A would be either 9A or 8B. While, a low energy boost can consist of either 9B or 10A. For moderate energy boost, you would use 6A and a high energy boost can either be 11A or 4A. However, if you are looking for a low energy drop, finding a song with a camelot key of 8A would be a great choice. Where 12A would give you a moderate drop, and 7A or 2A would be a high energy drop. Lastly, 12B allows you to change the mood.