List of musical instruments by Hornbostel–Sachs number: 321.21

This is a list of instruments by Hornbostel-Sachs number, covering those instruments that are classified under 321.21 under that system.These instruments may be known as bowl lyres.These instruments may be classified with a suffix, based on how the strings are caused to vibrate.
chordophonesstring instrumentsresonatoryoke lutesPlectrumKeyboardendongoBagandaUgandalizardskinGreece, AncienttortoisenyatitiHornbostel–Sachs systemIdiophoneStruckrattlePluckedGuimbardeFrictionNail violinMusical sawDaxophoneGlass harmonicaMembran-ophoneTubularChordophonezitherMusical bowStick zitherTroughHarp luteAerophoneFree reedFippleDouble reedSingle reedReedpipeNaturalChromaticElectrophoneActionAmplificationThereminList of musical instruments by Hornbostel–Sachs numberMusical instrument classification