This project, Massif and Archipelago, is a field recording project initiated by Japanese sound artist Yasuhiro Morinaga, documenting traditional gong music by different Southeast Asian ethnic groups. The project aimed to examine the impact of the natural and social environment on the gong music culture of Southeast Asia. During the project, he visited over 50 different ethnic groups and made hundreds of recordings. This album presents a selection of the unique gong music from different ethnic minorities. The selected music has been divided into two broad sections: one focussing on the music from the Massif, i.e. mainland Southeast Asia (Central Highland of Vietnam and Northeast Cambodia), the other on music from the Archipelago, maritime Southeast Asia (the Luzon Islands of the Philippines, Borneo, Sulawesi, and the Flores Islands of Indonesia).

The Bahnar are an ethnic group in Vietnam, living from the north to the south and northeast of the Vietnamese central highlands. Bahnar speak a language in the Mon-Khmer language group. These recordings were conducted in Dak Doa, Gia Lai Province. Bahnar people use both knobbed gongs and flat gongs; knobbed gongs mostly have a rhythmic function, the flat gongs are used for melodies. Usually a gong ensemble comprises 8 or 9 gongs in total (6 flat gongs and 2 or 3 knobbed gongs), but the number of gongs can go up to 20 (10 flat gongs, 10 knobbed gongs) or even 22 (11 flat and 11 knobbed). For this recording, the musicians brought different sorts of sharpened twig as drumsticks. the biggest knobbed gong was played by twig of jackfruits. For Bahnar people, gongs - equivalent in value to several water buffaloes - are acquired through exchanges with the people from Laos, Cambodia and nowadays with Kinh groups of Vietnam. Gong music is commonly played among the Bahnar on particular occasions such as harvesting, funeral, buffalo sacrifice, wedding ceremonies, etc.