Swing made "7" available on January 1, 2010. With this song being around four minutes long, at 3:33, 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. There is only one song in 電, so we believe that "7" is a single. In terms of popularity, 7 is currently not that popular. The overall mood can be danceable to some, especially with it's high amount of postive energy.

7 テンポ

The tempo marking of 7 by Swing is Andante (at a walking pace), since this song has a tempo of 95 テンポ. With that information, we can conclude that the song has a slow tempo. This song can go great with yoga or pilates. The time signature for this track is 4/4.

7 キー

This song has a musical key of C Major. This also means that this song has a camelot key of 8B. So, the perfect camelot match for 8B would be either 8B or 9A. While, 9B can give you a low energy boost. For moderate energy boost, you would use 5B and a high energy boost can either be 10B or 3B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 8A or 7B will give you a low energy drop, 11B would be a moderate one, and 6B or 1B would be a high energy drop. Lastly, 5A allows you to change the mood.