List of musical instruments by Hornbostel–Sachs number: 321.312

This is a list of instruments by Hornbostel-Sachs number, covering those instruments that are classified under 321.312 under that system. These instruments may be known as spike box lutes or spike guitars.

These instruments may be classified with a suffix, based on how the strings are caused to vibrate.

• 4: Hammers or beaters
• 5: Bare hands and fingers
• 6: Plectrum
• 7: Bowing
  • 71: Using a bow
  • 72: Using a wheel
  • 73: Using a ribbon
• 8: Keyboard
• 9: Using a mechanical drive

Instrument	Tradition	Hornbostel–Sachs classification	Description
banjo (with resonator)	African American	321.312-5	Four or five stringed instrument, plucked with a bare thumb and a forefinger covered by a metal thimble, traditionally with four or five strings,
gimbri guinbri, guimbri, gimbri, ginibri	Gnawa music	321.312	Rectangular box lute with leather tuning rings
gusle	Serbia, Montenegro and elsewhere in the former Yugoslavia	321.312	Stringed instrument, round, typically with one string bound at the top of the neck with a tuning peg Template:ErrorTemplate:Category handler
morin khuur horse-head fiddle,	Mongolia, Tuva	321.312	Two-stringed instrument, held between the legs, with a trapezoidal body and a horse's head typically carved on the upper edge of the pegbox
sanshin	Ryukyus of Japan	321.312-6	Three stringed banjo-like instrument, covered with snakeskin
sanxian	China	321.312	Three-stringed fretless plucked instrument, with a box covered in snakeskin.