Story and Clark was tuned just the other day as was the Kimball.
Then why did you decide to play this on a third piano?
Seriously, this doesn't sound like a piano that's been recently tuned. There are voicing issues too, with some notes having a distinctly different tone quality from that of their near neighbours.
I think the sound turned out pretty good, but I just want to make sure the sound is right for future recordings. I know it's not a perfect recording, but it was just something to record to test the sound.
I think the recording quality is adequate, but it kind of sounds as though you've turned the sensitivity down but are playing loudly. This piece should be mostly quiet. The piano itself doesn't sound as good as it ought to, and I wonder whether some of its foibles could be de-emphasised by moving the microphones further away, to make them hear something more like what your ears hear when you're playing, and not what someone would hear whose head is right next to the strings.
You don't have to put this up, unless it's good enough. I know you like whole sonatas, though.
or at least whole movements.
This is a minore section not of the sonata, but of its third movement.
It should go a lot faster, by the way. That would stop you over-emphasising the first note of each triplet. You need to have more of a feel for whole bars, or groups of 4 bars.
There is a significant hesitation at 0:30, but you play the right notes after it. On the repeat, you don't hesitate, but your RH plays E flats on the second beat instead of G flats.
Watch out at 1:29 (the bar before the two bars which the LH sits out); here the RH should play A naturals, not A flats.
I think the sound pops at the end, but I'm not quite sure why.
I don't know what you mean. Is it the little glitch where, in the 6th bar from the end, the RH D natural jumps in a little early? I think that's no more than a nervous flub, nothing to worry about sound-wise.