Chopin's exquisite ear saved him from the ugly repetition of thick chords in the bass that frequently disfigure the work of Mendelssohn, Weber, and H… - Charles Rosen

The world of Debussy is a seductive oasis, and it is hard to leave it after spending many days immersed in its atmosphere. Playing Debussy-or any other composer with a strong and idiosyncratic personality-affects not only one's cast of mind but the physical disposition as well, the way the muscles work and the fingers come into contact with the ivories.

The absolutely inaudible is rejected from music during the period of Viennese Classicism in which every musical line is potentially or imaginatively audible, but it makes a dramatic reappearance in the music of Schumann. The most striking of many examples is one of the episodes in the Humoresk, the last of the great piano works of Schumann's early years. ... There are three staves: the uppermost for the right hand; the lowest for the left; the middle, which contains the melody, is not to be played. Note that the melody is no more to be imagined as a specific sound than it is to be played: nothing tells us that the melody is to be heard as vocal or instrumental. This melody, however, is embodied in the upper and lower parts as a kind of after-resonance-out of phase, delicate, and shadowy.

Here, in the last pages of the "Abegg" Variations, Schumann plays the motto theme A-B-E-G-G (B in German notation is the English Bb) not by sounding the last four notes but by taking them away, one by one, from, the chord of Bb-E-G. This is the first time in history that a melody is signified not by the attack but by the release of a series of notes. The motto, however, ends with a repeated final G. If the motto is played by releasing each successive note, we are faced with a paradox: when the G is released once on the piano, it is no longer there to be released again-the motto is not only unplayable as conceived but unimaginable. Schumann signifies as much by another paradox: he adds accents to the sustained notes.