How did Segovia pull off the runs in, for example, Torroba's Serenata Burlesca opening E scale? Wow, that's so smooth. My fingers can't move that fast! Even the people I see play it on YT can't duplicate the 'fluidity' of Segovia's run. Was there any recording trickery going on here or did Segovia just have fast fingers?
Maybe if I practice scales for 8 hours a day like him .....
"GLASSYNAILS" on Youtoob for my "no edit" - "no fakery" audio recordings. Just me, my Alhambra 7p spruce, and an Olympus ls-10 portable recorder.
It is not very fast objectively. I think the run itself is around 4 x 140bpm (16ths at 140bpm per quarter note); after that the piece gets a bit slower at around 126bpm. What makes it easier is that it is actually comprised of 3 short runs - 8 notes in each - rather than a longer continuous run of 20-30 notes at that tempo. Burst speed is easier than sustained speed. On the other hand, what makes this run harder is that it ascends (descending runs are easier).
For comparison, top flamenco guitarists can probably do up to twice that speed, for sure as burst speed (as in this run).
EDIT: Oops, forgot to include a link to the Segovia video I was basing the estimates on: