Astro! Archive's 'extras' came out on March 11, 2023. extras is 2 minutes and 3 seconds long and may contain bad words that may be unsuitable for children. Because this song is the only song in extras and no other songs are present in the album, we classify this track as a single. extras is unknown right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

extras テンポ

The tempo marking of extras by Astro! Archive is Andante (at a walking pace), since this song has a tempo of 79 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.

extras キー

G Major is the music key of this track. This also means that this song has a camelot key of 9B. So, the perfect camelot match for 9B would be either 9B or 10A. While, 10B can give you a low energy boost. For moderate energy boost, you would use 6B and a high energy boost can either be 11B or 4B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 9A or 8B will give you a low energy drop, 12B would be a moderate one, and 7B or 2B would be a high energy drop. Lastly, 6A allows you to change the mood.