The difference in sound is due mostly to the nature of the hammering: hand hammering is done randomly (that is not in a regular pattern) and thus the cymbal has a darker sound-even if this "random" style is dictated and executed by a computer. Symmetrical hammering- which is almost always done by a machine- gives the cymbal a brighter sound. This fact is reinforced by the example of some cymbals from English independent cymbal maker, Matt Nolan, which are unusual in being truly hand hammered but made from Malleable Bronze. The results are darker sounds from what are normally considered brighter alloys.