Cosmograf's 'Regretful Refrain' came out on January 20, 2023. Regretful Refrain is about six minutes long, preciously at 6:01, making this song fairly long compared to other songs. The track order of this song in Cosmograf's "Heroic Materials" album is number 9 out of 10. In terms of popularity, Regretful Refrain is currently unknown. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.

Regretful Refrain テンポ

We consider the tempo marking of Regretful Refrain by Cosmograf to be Andante (at a walking pace) because the track has a tempo of 90 テンポ, a half-time of 45テンポ, and a double-time of 180 テンポ. Based on that, the speed of the song's tempo is slow. Activities such as, yoga or pilates, can go well with this song. The time signature for this track is 4/4.

Regretful Refrain キー

E♭ Major is the music key of this track. This also means that this song has a camelot key of 5B. So, the perfect camelot match for 5B would be either 5B or 6A. While, 6B can give you a low energy boost. For moderate energy boost, you would use 2B and a high energy boost can either be 7B or 12B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 5A or 4B will give you a low energy drop, 8B would be a moderate one, and 3B or 10B would be a high energy drop. Lastly, 2A allows you to change the mood.