KARDI made "First Line" available on October 15, 2022. With this song being around four minutes long, at 4:07, 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. Because this song is the only song in Hidden Singer7 - Episode. 9 and no other songs are present in the album, we classify this track as a single. On top of that, South Korea appears to be the country where this track was created. In terms of popularity, First Line is currently below average in popularity. Even with the track produces more of a neutral energy, it is pretty danceable compared to others.

First Line テンポ

We consider the tempo marking of First Line by KARDI to be Andante (at a walking pace) because the track has a tempo of 93 テンポ, a half-time of 46テンポ, and a double-time of 186 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.

First Line キー

This song is in the music key of E Major. This also means that this song has a camelot key of 12B. So, the perfect camelot match for 12B would be either 12B or 1A. While, 1B can give you a low energy boost. For moderate energy boost, you would use 9B and a high energy boost can either be 2B or 7B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 12A or 11B will give you a low energy drop, 3B would be a moderate one, and 10B or 5B would be a high energy drop. Lastly, 9A allows you to change the mood.