A concert is a live music performance in front of an audience. A recital is a concert by a soloist or small group which follows a program, such as featuring the works of a single composer (organ recital). A recitalist is a musician who gives frequent recitals. The invention of the solo piano recital has been attributed to Franz Liszt. Regardless of venue, musicians usually perform on a stage. Concerts often require live event support with professional audio equipment. Before recorded music, concerts provided the main opportunity to hear musicians play.