Which edition was Rubinstein working from? If a note was "added" that might be the answer.
In listening to it a few times now, it seems like quite a significant modification musically.
That is probably why he did it, being the romantic that he was.Modern automatons would probably not.Thal
I take from your term "automatons" that you view those who play the manuscript as written as limiting their own creative experience with the piece?
You can play from a score exactly as written but still make the piece sound different to others, without actually changing any notes, but i do not see that changing notes or even entire sections is inartistic if it is done with taste and knowledge that the composer himself might have done the same on occasions.Thal
What Rubinstein did was play: Eb (BbGb) (BbGb) he has added a Gb to the single Bb.He is merely keeping the waltz LH pattern going, neglecting the missed out note. I think it does effect the sound in a small way, it doesn't rise up as much as it should and thus the energy lost from the decresendo is not as effective.
Call me dumb, but I still can't hear what Rubenstein "added" to the score. It sounds like the famous waltz played with great taste and élan.
But there is an added note. It occurs at the Quarter Rest that I've put a black dot over. The added not is a B Flat in thetreble clef.
Still no explenation, though, for the first example (the added Bflat).