提取音乐（wav格式）中两种与弦特征：chromagram与tonalcentroid。其中chromagram是12维特特征，根据十二平均律而来；tonalcentroid是在十二平均律的基础上加入了了与弦结构信息（五度循环圈）的到的六维信息。

-Two and string features extract music (wav format): chromagram tonalcentroid. 12 Witt characteristics which chromagram equal temperament came the　tonalcentroid added on the basis of the equal temperament and chord structure (five-degree circle) to the six-dimensional information.