Julie Sue made "證人" available on June 18, 2015. The duration of 證人 is about 3 minutes long, at 3:28. Based on our data, "證人" 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 蘇芮 . 回首蘇芮時代全經典, so we believe that "證人" is a single. Based on our statistics, 證人's popularity is not that popular right now. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.

證人 テンポ

The tempo marking of 證人 by Julie Sue is Allegro (fast, quick, and bright), since this song has a tempo of 136 テンポ. With that information, we can conclude that the song has a fast tempo. This song can go great with walking. The time signature for this track is 4/4.

證人 キー

This song is in the music key of E Major. This also means that this song has a camelot key of 12B. So, the perfect camelot match for 12B would be either 12B or 1A. While, 1B can give you a low energy boost. For moderate energy boost, you would use 9B and a high energy boost can either be 2B or 7B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 12A or 11B will give you a low energy drop, 3B would be a moderate one, and 10B or 5B would be a high energy drop. Lastly, 9A allows you to change the mood.