Interesting lecture. I have to say that I've heard the many variants for pupils ascribed in a related, but different, way to the one dismissed during the video - the version I heard, which sounds more plausible, is not that variant A was for pianist X because he couldn't play passage Z, but that variant A was for pianist X because variant A suited his technical strengths more than passage Z ie Liszt was purposely writing variants to showcase individual pupils' particular gifts.
Hi Ronde_des_sylphes,
One could suggest similar things about the Chopin variants. For instance, with the E-flat/E-natural controversy of the Chopin Prelude in C Minor, the E-flat notated in a student's copy may have been to accommodate a student who found the E-natural to be too garish - and this is assuming that the accidental is in Chopin's hand.
Rachmaninoff, in his
Variations on a Theme of Chopin Op. 22 on that Prelude, has the E-natural in the Thema, as does Busoni in his
Variations and Fugue in Free Form [also an Op. 22] on the C Minor Prelude.
Back to Liszt, he didn't perform his music according to the published editions. Though it isn't mentioned in the Kenneth Hamilton lecture, something well worth looking at are the Liszt-Siloti editions which are based on hearing Liszt's performances of the compositions.
And there are such things as this piano roll by a Liszt student which is based on having heard Liszt perform the work:
The Kenneth Hamilton lecture only scratches the surface. One can only do so much in a 45 minute lecture.
Mvh,
Michael