Icaro – music sung in healing ceremonies of the Shipibo-Conibo people of Peru
Igbo – any music performed by the Igbo people of Nigeria
Illbient – form of ambient inspired by dub in its use of layering and hip hop in its use of sampling
Impressionist – style of Western art music inspired by the visual arts movement of the same name
Improvisational – any kind of music that is made up on the spot
Incidental – music played in the background of a film or play
Indietronica – fusion of indie rock and EDM
Indie folk – fusion of indie rock and folk music
Indie – music that is formed around an idea of remaining on the underground and a DIY ethic
Indie pop – a melodic, often angst-free and optimistic, form of pop-rock associated with the indie scene
Indie rock – generic term for rock music linked to the indie subculture
Indo jazz – fusion of jazz and traditional Indian music
Industrial death metal – fusion of industrial and death metal
Industrial hip hop – fusion of industrial and hip hop music
Industrial – early form of electronica that linked avant-garde electronic experimentation to punk rock energy, vocalisation, and ethics. Industrial spawned an indulgence in darkness, horror, and even fascism (although often not seriously) that carried over into goth, emo, and metalhead culture
Industrial musical – musical theater performed by the workers of a company to promote teamwork
Industrial metal – fusion of industrial and heavy metal music
Industrial rock – fusion of industrial and rock music
Instrumental – music that had no lyrics
Instrumental rock – any rock music that neglects vocals
Intelligent dance – more experimental and intellectual form of electronica so called to distinguish itself from the commercialist trends in rave music
Inuit – any music performed by the Inuit people of Greenland and Canada
Irish folk – traditional music of the Irish people
Irish rebel – Irish folk with an emphasis on Irish republicanism
Isicathamiya – a capella form of singing used by the Zulu people of South Africa
Islamic music
Isolationist – style of ambient that uses repetition and dissonance to create a sense of uneasiness
Italo dance – an optimistic form of Eurodance that developed in Italy
Italo disco – form of disco developed in Italy that lead to the creation of modern EDM
Italo house – Italian house music that followed on from Italo disco
Izvorna bosanska – Bosnian rural roots music
