Tonghae'an Pyŏlsin-gut & Ogwi-gut 한국음악선집 제24집 한국의 굿 No. 3 <동해안 별신굿과 오귀굿>

Muak is the traditional Korean shamanic music performed within gut (ritual) ceremonies to invite, appease, and send off deities and ancestral spirits. It is an ecstatic, participatory music that combines chant, dance, and instrumental ensemble performance to induce trance states for the shaman (mudang) and the community. The sound world centers on piercing double-reed oboes (taepyeongso/hojok), bamboo and reed flutes (daegeum and piri), two-string fiddle (haegeum), zither (gayageum), and a powerful percussion battery—small hand gong (kkwaenggwari), large hanging gong (jing), hourglass drum (janggu), and barrel drum (buk). Melodies move in modal frameworks such as ujo and gyemyonjo, while rhythm unfolds through cyclic changdan patterns like gutgeori, jajinmori, and semachi. Vocal delivery is declamatory and improvised, often recounting mythic narratives (e.g., bonpuri on Jeju) and blessing formulae.