好妹妹 made "你曾是少年" available on May 7, 2013. The duration of 你曾是少年 is about 3 minutes long, at 3:02. Based on our data, "你曾是少年" appears to be safe for all ages and is not considered explicit. This track is about the average length of a typical track. There is only one song in 南北, so we believe that "你曾是少年" is a single. Based on our statistics, 你曾是少年's popularity is below average in popularity right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

你曾是少年 テンポ

The tempo marking of 你曾是少年 by 好妹妹 is Allegro (fast, quick, and bright), since this song has a tempo of 140 テンポ. With that information, we can conclude that the song has a fast tempo. This song can go great with jogging or cycling. The time signature for this track is 4/4.

你曾是少年 キー

A Major is the music key of this track. This also means that this song has a camelot key of 11B. So, the perfect camelot match for 11B would be either 11B or 12A. While, 12B can give you a low energy boost. For moderate energy boost, you would use 8B and a high energy boost can either be 1B or 6B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 11A or 10B will give you a low energy drop, 2B would be a moderate one, and 9B or 4B would be a high energy drop. Lastly, 8A allows you to change the mood.