雷婷's '遗憾' came out on January 1, 2020. With this song being about 5 minutes long, at 4:31, "遗憾" by 雷婷 is fairly a long song compared to the average song length. This song does not have an "Explicit" tag, making it safe for all ages. There is only one song in 往事如昔, so we believe that "遗憾" is a single. In terms of popularity, 遗憾 is currently unknown. Although the overall vibe is very danceable, it does project more negative sounds.

遗憾 テンポ

The tempo marking of 遗憾 by 雷婷 is Moderato (at a moderate speed), since this song has a tempo of 114 テンポ. With that information, we can conclude that the song has a moderate tempo. The time signature for this track is 4/4.

遗憾 キー

F Major is the music key of this track. This also means that this song has a camelot key of 7B. So, the perfect camelot match for 7B would be either 7B or 8A. While, 8B can give you a low energy boost. For moderate energy boost, you would use 4B and a high energy boost can either be 9B or 2B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 7A or 6B will give you a low energy drop, 10B would be a moderate one, and 5B or 12B would be a high energy drop. Lastly, 4A allows you to change the mood.