NINE BY NINE made "Eternity" available on March 10, 2019. With this song being about 5 minutes long, at 4:30, "Eternity" by NINE BY NINE 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. Because this song is the only song in Eternity and no other songs are present in the album, we classify this track as a single. The popularity of Eternity is currently below average in popularity right now. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

Eternity テンポ

The tempo marking of Eternity by NINE BY NINE is Vivace (lively and fast), since this song has a tempo of 162 テンポ. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 4/4.

Eternity キー

This song has a musical key of E♭ Major. This also means that this song has a camelot key of 5B. So, the perfect camelot match for 5B would be either 5B or 6A. While, 6B can give you a low energy boost. For moderate energy boost, you would use 2B and a high energy boost can either be 7B or 12B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 5A or 4B will give you a low energy drop, 8B would be a moderate one, and 3B or 10B would be a high energy drop. Lastly, 2A allows you to change the mood.