Music or musical theory in Indonesia is studied under the Faculty of Art and Design or Faculty of Music.
There are several traditional Indonesian music theories, such as gamelan theory, musical theory, and gending theory.
One of the famous authors and experts in Indonesian music theory is Dr. Sumarsam, who taught at Wesleyan University, United States.
Indonesian music theory is strongly influenced by the culture and religion in Indonesia, such as Hinduism, Islam, and Buddhism.
There are several music streams in Indonesia that have different musical theories, such as keroncong, dangdut, and pop streams.
Music theory in Indonesia not only includes the theory of notation, but also rhythm theory, harmony theory, and melody theory.
Some traditional Indonesian musical instruments have a very complex music theory, such as Javanese gamelan and Balinese gamelan.
There are some Indonesian music artists who also produce works of music theory, such as I Wayan Sadra, Slamet Abdul Sjukur, and Guruh Soekarnoputra.
Music theory in Indonesia also recognizes special terms, such as the term sorogan which refers to the melody section sung by the main singer in gamelan.
Indonesian Music Theory continues to develop along with the development of music in Indonesia, both in terms of the flow of new music and the use of technology for modern music production.