"a." by C.C. was released on August 18, 2011. The duration of a. is about two minutes long, specifically at 2:02. This song does not appear to have any foul language. a.'s duration is considered a little bit shorter than the average duration of a typical track. Because this song is the only song in a. and no other songs are present in the album, we classify this track as a single. The popularity of a. is currently unknown right now. In our opinion, the overall tone is not very danceable and projects negative sounds, such as being sad, depressed, or angry.

a. テンポ

The tempo marking of a. by C.C. is Prestissimo (even faster than presto), since this song has a tempo of 224 テンポ. The time signature for this track is 5/4.

a. キー

B♭ Minor is the music key of this track. Because this track belongs in the B♭ Minor key, the camelot key is 3A. So, the perfect camelot match for 3A would be either 3A or 2B. While, a low energy boost can consist of either 3B or 4A. For moderate energy boost, you would use 12A and a high energy boost can either be 5A or 10A. However, if you are looking for a low energy drop, finding a song with a camelot key of 2A would be a great choice. Where 6A would give you a moderate drop, and 1A or 8A would be a high energy drop. Lastly, 6B allows you to change the mood.