I am not sure if there are distorsions from their playing originating from either the recording to the rolls or when they are scanned and converted to midi. Sometimes, it sounds too precise (as if the midi resolution was set too harsh as to perhaps 1/64 notes) but other times like they have sync problems between the hands which I hardly believe they had. At least, I think it gives a pretty good idea how they interpretated the music.
Robert, many thanks to the new piano roll postings. I find it absolut interesting to listen to Godowsky and Co., how they interpreted Chopin and others so long time ago. Since they were still in the old 19th century school, one comes closer to the manner it was played originally, so I hope. Godowsky plays with such an amount of rubato and speed changes - Cortot, the old rubato master, plays almost plain and even in comparison!
I hope that no midi resolution things like quantization to 1/64 note or whatever were done, to let the most possible amount of original music remain. Maybe what we would call now sync problems between hands nowadays, was hand independent chopinesque rubato 80 years back?