Beetlebug made "a letter from a notable source" available on October 30, 2021. The duration of a letter from a notable source is about 3 minutes long, at 3:06. Based on our data, "a letter from a notable source" 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 a letter from a notable source and no other songs are present in the album, we classify this track as a single. In terms of popularity, a letter from a notable source is currently below average in popularity. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.

a letter from a notable source テンポ

The tempo marking of a letter from a notable source by Beetlebug is Andante (at a walking pace), since this song has a tempo of 96 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.

a letter from a notable source キー

D♭ Major is the music key of this track. This also means that this song has a camelot key of 3B. So, the perfect camelot match for 3B would be either 3B or 4A. While, 4B can give you a low energy boost. For moderate energy boost, you would use 12B and a high energy boost can either be 5B or 10B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 3A or 2B will give you a low energy drop, 6B would be a moderate one, and 1B or 8B would be a high energy drop. Lastly, 12A allows you to change the mood.