Chopin’s Etude Op 10 No. 1 in C Major for solo piano was composed by Frédéric Chopin in 1829. It was first published in 1833 in France, Germany, and England as the first piece of his Études Op. 10. This study in reach and arpeggios focuses on stretching the fingers of the right hand. Also referred to as the Waterfall, this etude is considered one of the hardest of Chopin’s 24 Etudes. – Vladimir Ashkenazy Website – Vladimir Ashkenazy Wikipedia