"無料の鳥" by サウンドオブネイチャーゾーン was released on March 13, 2020. The duration of 無料の鳥 is about two minutes long, specifically at 2:47. This song does not appear to have any foul language. 無料の鳥's duration is considered a little bit shorter than the average duration of a typical track. There is only one song in 森の音:ストレス解消自然音楽, so we believe that "無料の鳥" is a single. 無料の鳥 is not that popular right now. In our opinion, the overall tone is not very danceable and projects negative sounds, such as being sad, depressed, or angry.
The tempo marking of 無料の鳥 by サウンドオブネイチャーゾーン is Andante (at a walking pace), since this song has a tempo of 83 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.
D Major is the music key of this track. This also means that this song has a camelot key of 10B. So, the perfect camelot match for 10B would be either 10B or 11A. While, 11B can give you a low energy boost. For moderate energy boost, you would use 7B and a high energy boost can either be 12B or 5B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 10A or 9B will give you a low energy drop, 1B would be a moderate one, and 8B or 3B would be a high energy drop. Lastly, 7A allows you to change the mood.