The cymbal is a percussion instrument whose origin can be traced back to prehistoric times. Cymbals consist of thin, normally round plates of metal alloys. Most modern cymbals are of untuned pitches. The clashing sound of cymbals is often a musical highlight of a performance. Cymbals are used in modern orchestras and a variety of bands. Some cymbals are part of drum sets, some are suspended cymbals and others are small cymbals, based on ancient designs, used for meditation.