文章以藏文和梵文母音作為切入點,以薩班《樂論》和《語門文法概要》等古籍文獻為主要論據,從理論高度闡明瞭藏傳佛教誦經音樂音律、上下起伏的旋律音調走向所構成的曲線線條、誦經音樂"央譯"樂譜的形成和關系等諸多學術問題。 In order to analyze chanting music of Tibetan Buddhism,the article studies the vowels of Tibetan and Sanskrit languages on the basis of The Musical Theory of Sakya Pandit and The Door of Talking:Brief Grammatical Text.Furthermore,the article discusses the chanting musical tonality of Tibetan Buddhism and the term "Yangyig" which is formed from the melody of ups and downs,rises and falls and so forth.