A LETTER TO TOMORROW by CAELIS Song Details

"A LETTER TO TOMORROW" by CAELIS had its release date on November 13, 2025. With this song being around four minutes long, at 4:28, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. There are a total of 10 in the song's album "The Things We Never Opened". In this album, this song's track order is #9. Based on our statistics, A LETTER TO TOMORROW's popularity is below average in popularity right now. Although the overall vibe is very danceable, it does project more negative sounds.

BPM and Tempo

With A LETTER TO TOMORROW by CAELIS having a BPM of 156 with a half-time of 78 BPM and a double-time of 312 BPM, we would consider this track to have a Allegro (fast, quick, and bright) tempo marking. Because of this, we believe that the song has an overall fast tempo. Looking at the BPM of this song, this song might go great with running. The time signature for this track is 4/4.

Music Key

A Minor is the music key of this track. Which also means that the camelot key for this song is 8A. So, the perfect camelot match for 8A would be either 8A or 7B. While, a low energy boost can consist of either 8B or 9A. For moderate energy boost, you would use 5A and a high energy boost can either be 10A or 3A. However, if you are looking for a low energy drop, finding a song with a camelot key of 7A would be a great choice. Where 11A would give you a moderate drop, and 6A or 1A would be a high energy drop. Lastly, 11B allows you to change the mood.

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