Table 2.

Algorithm definition table.

	Definition	Publicity
Interval statistics	Statistics of the melody interval are carried out on each track of the music [22]	$\text{Interval}\_{\text{Sta}}_i=\left\{\begin{array}{c}\left|{\text{Interval}}_i\right|,\left|{\text{Interval}}_i\right|<25\\ 25,\left|{\text{Interval}}_i\right|\ge 25\end{array}\right.$
Classification algorithm	According to the different characteristics of the interval distribution, the main track and the accompanying track are distinguished [23]	Rhythm=(n/T)=(n/(Dura_Meter × Dura_Num))