Lee Hyori, Lee Chan Hyuk made "FREE SMILE" available on June 24, 2022. The duration of FREE SMILE is about 3 minutes long, at 3:21. Based on our data, "FREE SMILE" appears to be safe for all ages and is not considered explicit. This track is about the average length of a typical track. Since Seoul Check-in OST Part 10 only contains only one song in the album, we like to consider this song as a single. Based on our statistics, FREE SMILE's popularity is average in popularity right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

FREE SMILE テンポ

With FREE SMILE by Lee Hyori, Lee Chan Hyuk having a テンポ of 156 with a half-time of 78 テンポ and a double-time of 312 テンポ, 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 テンポ of this song, this song might go great with running. The time signature for this track is 4/4.

FREE SMILE キー

This song is in the music key of F Major. Or for those who are familiar with the camelot wheel, this song has a camelot key of 7B. So, the perfect camelot match for 7B would be either 7B or 8A. While, 8B can give you a low energy boost. For moderate energy boost, you would use 4B and a high energy boost can either be 9B or 2B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 7A or 6B will give you a low energy drop, 10B would be a moderate one, and 5B or 12B would be a high energy drop. Lastly, 4A allows you to change the mood.