ON THE INHERITANCE,VARIABILITY AND SELECTION OF QIANG ETHNIC MINORITY'S "TOASTING SONG" IN THE TWO VOICES——Based on Xinmin Village in Zhenping Township,Songpan County

Qiang ethnic minority's Toasting song in the two voices is one of the art forms with multi-voice folk songs inherited by oral.The people who sing multi-voice folk songs are regarded as successor of playing folk music essence.When we talk about folk songs which were inherited by oral and developed to form music traditional resultant,the author thinks that we can take the key factors of Qiang ethnic minority's multi-voice folk songs as the following three kinds:firstly,the inheritance which connects modern with past;secondly,the variability which forms in individuals and collective creative activities;thirdly,the selection which is made by common folks from music pattern reserved up to now.