"Heroin" by Mercy was released on October 19, 2023. Heroin is 2 minutes and 24 seconds long and may contain bad words that may be unsuitable for children. Because this song is the only song in Heroin and no other songs are present in the album, we classify this track as a single. In terms of popularity, Heroin is currently below average in popularity. In our opinion, the overall tone is not very danceable and projects negative sounds, such as being sad, depressed, or angry.

Heroin テンポ

We consider the tempo marking of Heroin by Mercy to be Andante (at a walking pace) because the track has a tempo of 99 テンポ, a half-time of 50テンポ, and a double-time of 198 テンポ. Based on that, the speed of the song's tempo is slow. The time signature for this track is 4/4.

Heroin キー

This song is in the music key of F♯ Minor. This also means that this song has a camelot key of 11A. So, the perfect camelot match for 11A would be either 11A or 10B. While, a low energy boost can consist of either 11B or 12A. For moderate energy boost, you would use 8A and a high energy boost can either be 1A or 6A. However, if you are looking for a low energy drop, finding a song with a camelot key of 10A would be a great choice. Where 2A would give you a moderate drop, and 9A or 4A would be a high energy drop. Lastly, 2B allows you to change the mood.