Bangkok-born and Java-raised, Johanes “Mo’ong” Santoso Pribadi is an experimental music composer and instrument builder. His main area of study is music Nusantara, or the music of Indonesia.

Mo’ong started his studies in Western classical music with a major in double bass, but soon moved back to his roots to explorethe wisdom of Javanese folklore, He continued his Masters studies in the arts at the Indonesian Institute of the Arts, Surakarta, receiving a graduate degree in music composition supervised by composer Rahayu Supanggah. He was selected as a young emerging composer on IRC+ (International Rostrum of Composer) in 2015.

Mo’ong has been involved with a variety of national and international projects in many different genres of music, and with multidisciplinary projects within modern dance, modern theater, contemporary puppet theater, installation art, and performance art. In 2015 he initiated the "Limbah Berbunyi" project, where he created and composed musical instruments from found objects or junk. Another recent work, "Raja Kirik" is a Duo Experimental about the war of narratives during the Dutch occupation in Indonesia.

He has also worked as a sound designer and written music for several independent FIlms.