Accelio made "Heartless" available on March 1, 2022. With this song being about 5 minutes long, at 4:37, "Heartless" by Accelio 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. Because this song is the only song in Heartless and no other songs are present in the album, we classify this track as a single. The popularity of Heartless is currently unknown right now. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

Heartless テンポ

We consider the tempo marking of Heartless by Accelio to be Vivace (lively and fast) because the track has a tempo of 170 テンポ, a half-time of 85テンポ, and a double-time of 340 テンポ. Based on that, the speed of the song's tempo is fast. The time signature for this track is 4/4.

Heartless キー

F Minor is the music key of this track. Because this track belongs in the F Minor key, the camelot key is 4A. So, the perfect camelot match for 4A would be either 4A or 3B. While, a low energy boost can consist of either 4B or 5A. For moderate energy boost, you would use 1A and a high energy boost can either be 6A or 11A. However, if you are looking for a low energy drop, finding a song with a camelot key of 3A would be a great choice. Where 7A would give you a moderate drop, and 2A or 9A would be a high energy drop. Lastly, 7B allows you to change the mood.