The Green Apple Sea made "Sleep! Now!" available on April 29, 2011. With this song being around four minutes long, at 3:32, 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 10 in the song's album "Northern Sky, Southern Sky". In this album, this song's track order is #5. In terms of popularity, Sleep! Now! is currently not that popular. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

Sleep! Now! テンポ

With Sleep! Now! by The Green Apple Sea having a テンポ of 115 with a half-time of 58 テンポ and a double-time of 230 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 moderate 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.

Sleep! Now! キー

This song has a musical key of B♭ Major. This also means that this song has a camelot key of 6B. So, the perfect camelot match for 6B would be either 6B or 7A. While, 7B can give you a low energy boost. For moderate energy boost, you would use 3B and a high energy boost can either be 8B or 1B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 6A or 5B will give you a low energy drop, 9B would be a moderate one, and 4B or 11B would be a high energy drop. Lastly, 3A allows you to change the mood.