One of the pupils of Artur Schnabel told me that he never heard his teacher practice a difficult passage slowly, but he was struck by the way Schnabe… - Charles Rosen

The extraordinary stylistic changes of late eighteenth-century music may have provided much of the inspiration for the literature of the turn of the century, but the literary forms that resulted were deeply eccentric. It was these works—paradoxical, anticlassical, often with startlingly unbalanced proportions—which in turn influenced the music of the generation of composers that followed. The most clearly affected by literature and art were Schumann, Berlioz, and Liszt, but neither Mendelssohn nor Chopin remained untouched by literary developments, like the revival of Celtic and medieval poetry, as the overtures of Mendelssohn and the Ballades of Chopin explicitly demonstrate.

In almost every edition (and consequently most performances) of Chopin's Sonata in B flat Minor, Op. 35, there is a serious error that makes awkward nonsense of an important moment in the first movement. The repeat of the exposition begins in the wrong place.

Normally, misprints are either easily corrected or else so trivial that it makes no difference whether we play the correct or the faulty version. ... Nevertheless, on rare occasions, a misprint or slip of the pen may challenge our view of the musical language. These extreme cases may help us understand a little more about the way music acquires meaning, or what it means to say that the music makes sense.