BRAINDEAD, Frontières made "E.S.T." available on May 6, 2022. E.S.T. is 2 minutes and 39 seconds long and may contain bad words that may be unsuitable for children. Because this song is the only song in E.S.T. and no other songs are present in the album, we classify this track as a single. In terms of popularity, E.S.T. is currently not that popular. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

E.S.T. テンポ

The tempo marking of E.S.T. by BRAINDEAD, Frontières is Andante (at a walking pace), since this song has a tempo of 105 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.

E.S.T. 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.