RPWL's 'Sleep' came out on January 11, 2013. Since Sleep is still less than 10 minute long, it is still considered a pretty long duration song compared to the average song length. This song does not appear to be explicit due to the lack of the "E" tag. This song is part of World Through My Eyes by RPWL. The song's track number on the album is #1 out of 11 tracks. Sleep is 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.

Sleep テンポ

Since Sleep by RPWL has a tempo of 80 beats per a minute, the tempo markings of this song would be Andante (at a walking pace). With Sleep being at 80 テンポ, the half-time would be 40 テンポ with a double-time of 160 テンポ.In addition, we consider the tempo speed to be pretty slow for this song. The time signature for this track is 4/4.

Sleep キー

This song has a musical key of C Major. Or for those who are familiar with the camelot wheel, 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.