"预习" by 婴儿沉睡 had its release date on February 15, 2019. This song is about six minutes long, preciously at 5:30, making this song fairly long compared to other songs. There is only one song in 婴儿摇篮曲2019 - 最好听的宝宝音乐为了催眠，午觉和休息, so we believe that "预习" is a single. 预习 is unknown right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.
The tempo marking of 预习 by 婴儿沉睡 is Andante (at a walking pace), since this song has a tempo of 80 BPM. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.
D Major is the music key of this track. This also means that this song has a camelot key of 10B. So, the perfect camelot match for 10B would be either 10B or 11A. While, 11B can give you a low energy boost. For moderate energy boost, you would use 7B and a high energy boost can either be 12B or 5B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 10A or 9B will give you a low energy drop, 1B would be a moderate one, and 8B or 3B would be a high energy drop. Lastly, 7A allows you to change the mood.
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