Allegro barbaro, BB 63 (Sz. 49), composed in 1911, is one of Béla Bartók's most famous and frequently performed solo piano pieces. The composition is typical of Bartók's style, utilizing folk elements. The work combines Hungarian and Romanian scales; Hungarian peasant music is based on the pentatonic scale, while Romanian music is largely chromatic.
To keep the edge of freedom and wild force, Bartók frequently breaks the flow of Allegro Barbaro in a peremptory way to scare us a little with a potential for violence. The irregular-seeming cadences ending the major phrases and sections catch you by surprise or make you wait a bit for each return to the attack. Many analyses of this composition include the overall form and harmonies, but have not been able to find a pattern in how the cadences are formed. The dynamics are jagged and shocking as well through the entire piece. For example, there are accent marks and the sff (which means "subito fortissimo"/“suddenly way loud”) above these lines of the score.
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