Musicians play musical instruments to entertain an audience. Depending on their area of specialisation, they may write, arrange, perform and conduct music compositions. While there are many areas of music to work in, from studying its history to performing jazz or opera, musicians tend to specialise in a particular musical instrument or style of music. Despite this, they need to be flexible. For example, they may perform solo in an open air concert of a few hundred people in Kings Park, and then perform with a group of other musicians for a gallery opening in Subiaco.