278 Musical Facts and Sustainability of Trunthung Music in Eco-cultural Studies Fajry Sub’haan Syah Sinaga  , Syahrul Syah Sinaga Universitas Negeri Semarang, Indonesia Submitted: 2021-08-07. Revised: 2021-11-25. Accepted: 2021-12-26 Abstract This study aims to review the sustainability of Trunthung Music that shapes an ecosystem within the context of eco-culture. The study belongs to the nature of qualitative research with an interdisciplinary approach and several ecological concepts that refect the culture of the peasant community over the slope of Merbabu Mountain in Magelang. The study itself is conducted in Warangan Hamlet and Gejayan Hamlet, the Regency of Magelang. The data are gathered through observation, documentation, and in-depth interviews with the informants related to the Trunthung Music. Then, the source triangulation technique is implemented through the test of trustworthiness by inspecting the data on the development of Trunthung Music toward the artists in Warangan Hamlet and the members of Lima Gunung Community. The data that have been attained from various sources are described, categorized, and eventually analyzed so that the ecosystem of Trunthung Music that has been on the progress can be identifed. The results of the study show that Trunthung Music has been a performance that combines sonoric, kinesthetic, and visual dimensions, including their association with the natural condition and the peasant life over the Slope of Merbabu. The dialectics of Trunthung Music and the components of its ecosystem are in interaction with one another, resulting in the sustainability of the music until the present days. Then, the components of such ecosystem are the local agents who create the Trunthung Music and their interaction with the art community, be it with the Lima Gunung Community in the context of the Regency of Magelang and with the artists living outside the Regency of Magelang. In addition, the presence of Trunthung Music is associated with the traditional rites in the Warangan Hamlet, such as Nyadran Kali and Tapak Jaran Sembrani. All of these activities have good correlations among music, environment, and culture within the context of eco-culture. Keywords: eco-culture, sustainability, trunthung music, ecosystem, musical fact How to Cite: Sinaga, F. S. S., & Sinaga, S. S. (2021). Musical Facts and Sustainability of Trunthung Music in Eco-cultural Studies. Harmonia: Journal of Arts Research And Education, 21(2), 278-289 Harmonia: Journal of Arts Research and Education 21 (2) (2021), 278-289 Available online at http://journal.unnes.ac.id/nju/index.php/harmonia DOI: http://dx.doi.org/10.15294/harmonia.v21i2.31528 arts that have grown and developed well is Trunthung Music, which can be found in the middle Warangan Hamlet community – the Province of Central Java Musik. An interesting phenomenon regar- ding Trunthung Music dates back to when Sutanto Mendut and Eko Sunyoto initi- ated a colossal musical performance as a INTRODUCTION Music is an entity that will always be present in every line of human life. In a wi- der context, music has a close association with both the environment and the social life of the supporting community. In relati- on to the statement, one of such traditional  Corresponding author: E-mail: fajrysinaga@students.unnes.ac.id p-ISSN 2541-1683|e-ISSN 2541-2426