Q.E.D. by 加藤慶久 Song Details

加藤慶久's ' "Q.E.D." was released on its scheduled release date, September 17, 2025. The duration of This song is about 3 minutes long, at 3:11. Based on our data, This song appears to be safe for all ages and is not considered explicit. This track is about the average length of a typical track. There is only one song in サイレント・ウィッチ 沈黙の魔女の隠しごと Original Soundtrack, so we believe that "Q.E.D." is a single. The popularity of Q.E.D. is currently unknown right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

BPM and Tempo

The tempo marking of Q.E.D. by 加藤慶久 is Presto (very, very fast), since this song has a tempo of 180 BPM. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 3/4.

Music Key

B♭ Major is the music key of this track. 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.

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