A frequent collaborator of 'The Banshees Of Inisherin' writer/director Martin McDonagh, composer Carter Burwell previously worked on three of his films: 'In Bruges', 'Seven Psychopaths' and 'Three Billboards Outside Ebbing, Missouri'. This soundtrack features a Balinese gamelan ensemble - performing on mostly metallic instruments. Taking that inspiration, Burwell weaved gamelan instruments alongside the score's three main instruments: the celeste - a keyboard that plays bell sounds, the harp, and the flute to create the film's highly-acclaimed score.