Hornbostel–Sachs

Hornbostel–Sachs taxonomy

Musical instruments classified by how they produce sound — from the five abstract families down through ever more particular subclasses.

1Idiophones6 subcategories2Membranophones4 subcategories3Chordophones3 subcategories4Aerophones3 subcategories5Electrophones6 subcategories
41Free aerophones4 subcategories42Wind instruments proper5 subcategories43Mixed sets of aerophones
420Edge-tone instruments that are not flutes421Edge instruments or flutes3 subcategories422Reedpipes4 subcategories423Labrosones3 subcategories424Membranopipes
421.1Flutes without duct4 subcategories421.2Flutes with duct2 subcategories421.23Flutes with internal baffle and external cover
421.21Flutes with external duct2 subcategories421.22Flutes with internal duct2 subcategories
421.221Single flutes with internal duct4 subcategories421.222Sets of flutes with internal duct4 subcategories
421.222.1Sets of open flutes with internal duct2 subcategories421.222.2Sets of partly-stopped flutes with internal duct421.222.3Sets of stopped flutes with internal duct421.222.4Sets of dissimilar flutes with internal duct
421.222.11Sets of open internal-duct flutes without fingerholes421.222.12Sets of open internal-duct flutes with fingerholes

Sets of open flutes with internal duct (421.222.1)