A pentatonic scale is a musical scale with five pitches per octave in contrast to an heptatonic (seven note) scale such as the major scale. Pentatonic scales are very common an are found all over the world, including but not limited to Celtic folk music, Hungarian folk music, West African music, African-American spirituals, American blues music and rock music, Sami joik singing, children's songs, the clarinet music of Epirus in northwest Greece and Southern Albania, the tuning of the Ethiopian krar and the Indonesian gamelan, melodies of Japan and China (including the folk music of these countries), the Afro-Caribbean tradition, Polish highlanders from the Tatra Mountains, and Western Classical composers such as French composer Claude Debussy.