SILENT SIREN's 'I×U' came out on February 12, 2014. I×U is about six minutes long, preciously at 5:43, making this song fairly long compared to other songs. There is only one song in 31Wonderland, so we believe that "I×U" is a single. The popularity of I×U is currently not that popular right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

I×U テンポ

The tempo marking of I×U by SILENT SIREN is Presto (very, very fast), since this song has a tempo of 180 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.

I×U キー

This song has a musical key of G Major. This also means that this song has a camelot key of 9B. So, the perfect camelot match for 9B would be either 9B or 10A. While, 10B can give you a low energy boost. For moderate energy boost, you would use 6B and a high energy boost can either be 11B or 4B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 9A or 8B will give you a low energy drop, 12B would be a moderate one, and 7B or 2B would be a high energy drop. Lastly, 6A allows you to change the mood.