The varieties of Nusantara culture become so attractive among art observers around the world, one of the derivative products is known as Nusantara Ethnic. The occurrence of these Nusantara ethnic community, which later become Nusantara (nationality) when dealing with teaching materials, are very interesting for in-depth study. Gangsadewa as one of Nusantara ethnic music developers has completely done many innovation and experiments in the repertoire of the results of intense exploration. Looking at this movement is no longer about the use of multi-ethnic instruments, but it is considered as the spirit of nationalism and concern for the existence of ethnic Nusantara which becomes the focus of this movement contextually. There are several aspects of this Nusantara ethnic ensemble, namely ethnological, socio-anthropological, and musicological aspects. Gangsadewa has done them simultaneously. The collected data is classified based on its accompaniment, innovation of the instrument (music tool), philosophical values, aesthetic understandings, which involve the professional musician directly and analyzed descriptively. The research used descriptive method to analyze the data. This observation began with stages of preparation, observation, and development in the form of paper creation. The result shows the expectation in providing the inputs for the development of strength-based cultural arts of the local genius on an ongoing basis.