Spinardi, Felp 22 made "O Underground" available on July 19, 2018. O Underground is explicit and may not be suitable for children. With the duration being about 3:30, this song is close to the average duration of a typical track. Since O Underground only contains only one song in the album, we like to consider this song as a single. The popularity of O Underground is currently not that popular right now. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

O Underground テンポ

With O Underground by Spinardi, Felp 22 having a テンポ of 166 with a half-time of 83 テンポ and a double-time of 332 テンポ, we would consider this track to have a Vivace (lively and fast) tempo marking. Because of this, we believe that the song has an overall fast tempo. The time signature for this track is 4/4.

O Underground キー

This song has a musical key of D Major. Or for those who are familiar with the camelot wheel, this song has a camelot key of 10B. So, the perfect camelot match for 10B would be either 10B or 11A. While, 11B can give you a low energy boost. For moderate energy boost, you would use 7B and a high energy boost can either be 12B or 5B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 10A or 9B will give you a low energy drop, 1B would be a moderate one, and 8B or 3B would be a high energy drop. Lastly, 7A allows you to change the mood.