 An example is the way in which many instruments commonly associated with a modern symphony orchestra are markedly different from the same instruments for which European composers were composing music centuries ago.Such changes include the addition of piston valves to brass instruments, the design of more complex fingering systems for woodwind instruments such as the flute, and the standardization of the family of orchestral string instruments.Many advancements were made in music instrument technology during the Middle Ages and 19th Century.