The investigation of Takatomo Kurosawa carried out in Taiwan in 1943 is a milestone of the history of Taiwan music. His research reports as well as some of the field recordings were published in 1973 as "The Music of Takasago Tribe in Formosa". The musicologists today continue to cite and adopt the result of this work because of its significance. Nevertheless, there are various reflections in aboriginal societies upon some points of view of Kurosawa regarding the musical features of different ethnic groups. This article aims to investigate the issues of the transmission of musical form and the conceptualization of tradition based on the reflections on the research of Kurosawa. First, it proposes that the parallel singing in fourth of Saysiyat music in Kurosawa's recording is only a particular case at that time instead of a musical tradition. The second part starts with the analyses of the songs "Pray to Divinities" and "Pray for Rain" of Falangaw Amis, and then illustrates the style change of Falangaw music in the last half-century to observe their conceptualization of the musical tradition. Both the discussions will approach the perspective today on the early researches and the historical recordings, including the issues about the difference between the tradition and the reality in the research of Taiwan Aboriginal music.