The way Gould's playing it: is it his interpretation? He's playing all the bars "jerkily", "choppy" (ie removing fingers whatever from keys), except for the 25th, the 28th and possibly 29th and 30th (these ones are kind of intermediate) that are played softly. I checked the notes and the construction of all the bars (except the very end, of course) seemed to be identical. Juozas Rimas Lithuania