Étude Op. 25, No. 1 in A-flat major is a solo piano work composed by Frédéric Chopin in 1836, and published in 1837. The work consists entirely of rapid arpeggios and harmonic modulations based on A-flat major. Alternatively, it is known as "Aeolian Harp" and "The Shepherd Boy." This étude comprises a right-hand melody and supportive bass line, the accompaniment consisting of broken chords, provided by the inner voices of both hands.
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