眩暈SIREN made "灰虚" available on August 25, 2017. With this song being around four minutes long, at 4:04, 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 is only one song in 六花, so we believe that "灰虚" is a single. The popularity of 灰虚 is currently not that popular right now. Based on the vibe, this track doesn't seem to be that danceable, however its valence properties can make this some somewhat danceable.

灰虚 テンポ

The tempo marking of 灰虚 by 眩暈SIREN is Presto (very, very fast), since this song has a tempo of 194 テンポ. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 4/4.

灰虚 キー

E Minor is the music key of this track. Because this track belongs in the E Minor key, the camelot key is 9A. So, the perfect camelot match for 9A would be either 9A or 8B. While, a low energy boost can consist of either 9B or 10A. For moderate energy boost, you would use 6A and a high energy boost can either be 11A or 4A. However, if you are looking for a low energy drop, finding a song with a camelot key of 8A would be a great choice. Where 12A would give you a moderate drop, and 7A or 2A would be a high energy drop. Lastly, 12B allows you to change the mood.