NCT U made "I.O.U" available on November 23, 2020. 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. There are a total of 21 in the song's album "NCT RESONANCE Pt. 2 - The 2nd Album". In this album, this song's track order is #20. Furthermore, we believe that the track originated from South Korea. Based on our statistics, I.O.U's popularity is average in popularity right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

I.O.U テンポ

With I.O.U by NCT U having a テンポ of 125 with a half-time of 62 テンポ and a double-time of 250 テンポ, we would consider this track to have a Allegro (fast, quick, and bright) 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 4/4.

I.O.U キー

This song has a musical key of E Major. This also means that this song has a camelot key of 12B. So, the perfect camelot match for 12B would be either 12B or 1A. While, 1B can give you a low energy boost. For moderate energy boost, you would use 9B and a high energy boost can either be 2B or 7B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 12A or 11B will give you a low energy drop, 3B would be a moderate one, and 10B or 5B would be a high energy drop. Lastly, 9A allows you to change the mood.