So I hear this Etude the other day, and I notice I play the bass differently in measure 40 for the last four notes on the left hand : While the right hand plays B---C-D, I play A D F A (leading to octave G), as in http://imslp.info/files/imglnks/usimg/9 ... P10_12.PDF (bottom right of page 2) and I heard A C D A (leading to octave G), as in http://imslp.info/files/imglnks/usimg/7 ... 600dpi.pdf (bottom right of page 37). Which is the commonly accepted one ? Is there any reasoning that should make it obvious to me ? (I'm guessing A C D A is the correct one, because everyone plays that on youtube ) Thanks in advance ! And in order to somewhat broaden the topic - what do you do when there are varying notes in different editions of a piece ?