Brother Of Sleep by Firmament Song Details

Firmament's ' "Brother Of Sleep" was released on its scheduled release date, September 19, 2025. With this song being about 5 minutes long, at This song 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. The song is number 6 out of 9 in For Centuries Alive by Firmament. In terms of popularity, Brother Of Sleep is currently unknown. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

BPM and Tempo

The tempo marking of Brother Of Sleep by Firmament is Moderato (at a moderate speed), since this song has a tempo of 113 BPM. With that information, we can conclude that the song has a moderate tempo. The time signature for this track is 4/4.

Music Key

A♭ Major is the music key of this track. This also means that this song has a camelot key of 4B. So, the perfect camelot match for 4B would be either 4B or 5A. While, 5B can give you a low energy boost. For moderate energy boost, you would use 1B and a high energy boost can either be 6B or 11B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 4A or 3B will give you a low energy drop, 7B would be a moderate one, and 2B or 9B would be a high energy drop. Lastly, 1A allows you to change the mood.

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