One of these pieces by this composer is in A-flat major and opens with the right hand playing a trill on E-flat that lasts eight bars. A piece only posthumously grouped with these works bears the nickname "Sostenuto" and is in E-flat major. In the standard version of the ballet Les Sylphides, some of these pieces by this composer are the only ones 
One of these pieces by this composer is in A-flat major and opens with the right hand playing a trill on E-flat that lasts eight bars. A piece only posthumously grouped with these works bears the nickname "Sostenuto" and is in E-flat major. In the standard version of the ballet Les Sylphides, some of these pieces by this composer are the only ones in the keys of G-flat major, C-sharp minor, or E-flat major. The first of these pieces to be published is titled (*) "Grande brillante," and the "Farewell" one was dedicated to the composer's former fiancée Maria Wodzi´nska. The sight of a dog chasing its tail inspired one of these pieces titled "Minute." For 10 points, name these dances in 3/4 time by the composer of the Revolutionary Etude.
One of these pieces by this composer is in A-flat major and opens with the right hand playing a trill on E-flat that lasts eight bars.
waltzes by Frédéric Chopin [or waltzes by Frédéric François Chopin; or waltzes by Fryderyk Franciszek Chopin; prompt on partial answers]