The "nobat" musical instruments, which are used by the Royal Orchestra, are one drum, one "nafiri", or flute, two "nobat" drums, one ordinary flute and one gong. The Kedah Royal "Nobat" is one of the oldest in the nation and for generations has been performed at official functions such as Royal Installations, Royal Weddings and Royal Funeral Ceremonies. "Nobat" players are selected based on descent. The "nobat" may only be played at the Sultan's orders and only for certain functions and ceremonies.