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.

3: Instruments in which sound is produced by one or more vibrating strings (chordophones, string instruments).

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