Kalpee made "Love Letter" available on February 14, 2019. The duration of Love Letter is about 3 minutes long, at 3:23. Based on our data, "Love Letter" appears to be safe for all ages and is not considered explicit. This track is about the average length of a typical track. Because this song is the only song in Love Letter and no other songs are present in the album, we classify this track as a single. In terms of popularity, Love Letter is currently not that popular. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.

Love Letter テンポ

We consider the tempo marking of Love Letter by Kalpee to be Andante (at a walking pace) because the track has a tempo of 92 テンポ, a half-time of 46テンポ, and a double-time of 184 テンポ. Based on that, the speed of the song's tempo is slow. Activities such as, yoga or pilates, can go well with this song. The time signature for this track is 4/4.

Love Letter キー

This song is in the music key of C Major. This also means that this song has a camelot key of 8B. So, the perfect camelot match for 8B would be either 8B or 9A. While, 9B can give you a low energy boost. For moderate energy boost, you would use 5B and a high energy boost can either be 10B or 3B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 8A or 7B will give you a low energy drop, 11B would be a moderate one, and 6B or 1B would be a high energy drop. Lastly, 5A allows you to change the mood.