My guess is that this is the Glenn Gould clip that sent Jessica Williams into a new phase (see the first paragraph of the previous exhibit). It’s from the documentary Art Of Piano. Gould is at home, fairly early in his career, working out on the Bach “Partita # 2.”
Doug Ramsey on Jazz and other matters...
Thanks for posting this glimpse of his practice methods. I noticed that when the third voice enters with the fugue subject in the bass, he articulates the first four or five notes differently–slightly more legato than in upper and middle voices–and he maintains this distinction through the piece. And good lord, is he really doing that final trill with fingers 4 and 5? I can’t see clearly enough to be certain but if so, zowie!
I believe the word I’m looking for here is “wow.”