在现存的P.3808敦煌乐谱中,有两首同名的《水鼓子》。一首是在第二卷中的《水鼓子》,总序号为第18曲;另一首是在第三卷中的《水鼓子》,总序号为第25曲。这两首同名乐曲,从谱面上来看,它们各自每一乐句所用的音高谱字均不相同,但经日本学者林谦三推定了这两首乐曲的琵琶定弦之后,它们的旋律骨干基上能够相重合,只是调高有所不同。这样,此两首乐曲的存在,又反过来证明了林谦三所推定的琵琶定弦绝对正确。由于这两首乐曲的琵琶定弦问题 In the existing P.3808 Dunhuang score, there are two of the same name “water drum child.” One is the “water drum” in the second volume, the total number is the first 18 songs; the other is in the third volume “water drums”, the total number of 25 songs. The two songs of the same name, from the spectrum point of view, each of them respectively used in the pitch spectrum are not the same, but the Japanese scholar Lin Qian three presumed the pipa music of these two songs, their melodic skeleton On the coincidence, but raised different. In this way, the existence of these two pieces of music, in turn, proves that Lin Qian three presumed pipa strings are absolutely correct. Due to the pipa strings of these two songs