A piece of music, usually for organ, that is played as part of a church service. In English-speaking countries, the music played before and after the service is often called a 'voluntary', whether or not it is titled so. Originally, the term was used for a piece of organ music that was free in style. During the late 17th century, a 'voluntary' was typically written in a fugal or imitative style, often with different sections. In the 18th century the form typically began with a slow movement and then a fugue. Purcell-Trumpet Voluntaire07
