Cymbals are a common
percussion instrument. Cymbals consist of thin, normally round plates of various
alloys. The majority of cymbals are of indefinite pitch, although small disc-shaped cymbals based on ancient designs sound a definite note (see:
crotales). Cymbals are used in many ensembles ranging from the orchestra, percussion ensembles, jazz bands, heavy metal bands, and marching groups.
Drum kits usually incorporate at least a
crash,
ride or
crash/ride, and a pair of
hi-hat cymbals.