"長く深い睡眠" by 夜空のギター was released on January 18, 2022. With this song being around four minutes long, at 4:20, 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 is only one song in 冬の睡眠ギター音楽: ゆっくりアコースティックギターの快眠音楽, クラシック睡眠音楽, so we believe that "長く深い睡眠" is a single. 長く深い睡眠 is not that popular right now. In our opinion, the overall tone is not very danceable and projects negative sounds, such as being sad, depressed, or angry.
The tempo marking of 長く深い睡眠 by 夜空のギター is Larghetto (rather broadly), since this song has a tempo of 61 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 3/4.
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.