Concerto No. 5 In E-Flat Major For Piano And Orchestra, Op. 73 "Emperor" - Concerto No. 5 in E Flat Major for Piano and Orchestra, Op. 73 "Emperor": I. Allegro (降E大调第5号钢琴与管弦乐团协奏曲，作品73“皇帝” - 第一乐章 快板)