A bass drum is a relatively large drum that produces a note of low definite or indefinite pitch. The bass drums are of variable sizes and are used in several musical genres (see usage below). Three major types of bass drums can be distinguished: the large orchestral bass drum, the smaller 'kick' drum, and the pitched bass drums. The type usually seen or heard in orchestral, ensemble or concert band music is the orchestral, or concert bass drum (in italian: gran cassa, gran tamburo). It is the largest drum of the orchestra. The 'kick' drum, struck with a beater attached to a pedal, is usually seen on drum kits. The third type, the pitched bass drum, is generally used in marching bands and drum corps. This particular type of drum is tuned to a specific pitch and is usually played in a set of three to five drums. The bass drum was imported from the Middle East. It is a direct descendant of the davul.