Toshihiko Sahashi made "序章" available on October 24, 2007. With 序章 being less than two minutes long, at 1:08, we are fairly confident that this song is not explicit and is safe for all ages. Based on the duration of this song, this song duration is much smaller than the average song duration. There is only one song in 劇場版 仮面ライダー電王 俺、誕生!オリジナルサウンドトラック, so we believe that "序章" is a single. The popularity of 序章 is currently not that popular right now. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.
The tempo marking of 序章 by Toshihiko Sahashi is Vivace (lively and fast), since this song has a tempo of 176 BPM. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 4/4.
This song has a musical key of B♭ Minor. Because this track belongs in the B♭ Minor key, the camelot key is 3A. So, the perfect camelot match for 3A would be either 3A or 2B. While, a low energy boost can consist of either 3B or 4A. For moderate energy boost, you would use 12A and a high energy boost can either be 5A or 10A. However, if you are looking for a low energy drop, finding a song with a camelot key of 2A would be a great choice. Where 6A would give you a moderate drop, and 1A or 8A would be a high energy drop. Lastly, 6B allows you to change the mood.
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