Mert, Samra made "u21" available on April 23, 2017. With this song being around four minutes long, at 3:41, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. Since u21 only contains only one song in the album, we like to consider this song as a single. Furthermore, we believe that the track originated from France. Based on our statistics, u21's popularity is average in popularity right now. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

u21 テンポ

With u21 by Mert, Samra having a テンポ of 120 with a half-time of 60 テンポ and a double-time of 240 テンポ, we would consider this track to have a Moderato (at a moderate speed) tempo marking. Because of this, we believe that the song has an overall fast tempo. Looking at the テンポ of this song, this song might go great with walking. The time signature for this track is 3/4.

u21 キー

This song is in the music key of E Minor. Which also means that the camelot key for this song is 9A. So, the perfect camelot match for 9A would be either 9A or 8B. While, a low energy boost can consist of either 9B or 10A. For moderate energy boost, you would use 6A and a high energy boost can either be 11A or 4A. However, if you are looking for a low energy drop, finding a song with a camelot key of 8A would be a great choice. Where 12A would give you a moderate drop, and 7A or 2A would be a high energy drop. Lastly, 12B allows you to change the mood.