キム・ヨンジャ made "約束" available on November 2, 2011. With this song being around four minutes long, at 4:27, 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 キム・ヨンジャ ベストセレクション~情熱のバラ・北の雪虫~, so we believe that "約束" is a single. Based on our statistics, 約束's popularity is unknown 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.

約束 テンポ

The tempo marking of 約束 by キム・ヨンジャ is Allegro (fast, quick, and bright), since this song has a tempo of 121 テンポ. With that information, we can conclude that the song has a fast tempo. This song can go great with walking. The time signature for this track is 4/4.

約束 キー

E♭ Minor is the music key of this track. Because this track belongs in the E♭ Minor key, the camelot key is 2A. So, the perfect camelot match for 2A would be either 2A or 1B. While, a low energy boost can consist of either 2B or 3A. For moderate energy boost, you would use 11A and a high energy boost can either be 4A or 9A. However, if you are looking for a low energy drop, finding a song with a camelot key of 1A would be a great choice. Where 5A would give you a moderate drop, and 12A or 7A would be a high energy drop. Lastly, 5B allows you to change the mood.