Assume all works to be major tone,base on a simple rule:for a certain period of time within which the major tone scale appear most frequently on the view that the time for this tune.

• 调性分析以确实存在调性这个概念为前提，只考虑大调式，建立在一个规则上：一定时间内哪个调的大调音阶出现次数最多，就认为这段时间为此调。