If every public performance were about perfection, greatness and being elite, I might as well pack up my bags now and become a plumber for I would want nothing to do with music. Of all the great composers Beethoven was the one who most expressed humanity in his music. If were were only allowed to perform a piece in a state of perfection and egotistical greatenss there would be no performances and no music - all this because we would never have the chance to learn from our mistakes and have others inform us to how we may improve.
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Really not as bad as some may have you believe. You have obviously put a lot of work into it already, and it is well on its way. I must commend you for your effort.
Here is my play-by-play, in hopes it will encourage you to keep working at this wonderful piece. I have taken into consideration that you did record this on a digital, but a lot of my comments are based on the sound you have created.
Bar 23: Steady here. It looks like you have all the notes in your fingers, now you just have to give them more direction. I am not feeling you sense of beat or direction of phrasing. Instead of thinking of this passage as a bunch of 16ths, examine the phrasing. Look for the peaks and valleys in phrasing and use them to lead your music. This goes for other similar passages with runs.
Bar 35: Try to make the chords more even. This may be a result of the digital, as it is much harder to control than an acoustic. Think firm fingers and play into the keys (notice I did not say stiff wrists). If you play any racquet sports or golf you will know the importance of the approach and follow though of your swing. Similarly don’t just plonk your hands to play a chord: approach it, and then follow through once your fingers have reached the bottom of the keys. It also seems you have a bit too much pedal here (might be an issue with digital), try to change it more often.
Bar 43: The upper triplets could be given more shape.
Bar 54: Again try to have a more defined beat, this lack of pulse may also be part of the cause of the unevenness in theses and similar passages. When you feel the pulse, phrasing becomes more apparent and you can start thinking of the bigger phrases than individual notes. I’m not saying play metronomically, I’m saying you should feel a pulse.
Bar 57-58: You change tempos here a bit. It doesn’t feel like you went from triplets to 16ths.
Bar 66-67: The sF is a characteristic of Beethoven. If he puts it only on certain notes they should stand out from the rest. It does not say FF for everything.
Bar 73-74: I believe you are leaving out some notes in the RH at the termination of the LH trill.
Bar 82-85: I see you are trying to lead your phrasing here. This is good, but you are also making lots off tempo changes as well. Try for a steadier tempo. Note that a crescendo does not mean accelerando in this case.
Bar 85-86: My previous comment is much more evident here: eighth notes in bar 85 should equal eighth notes in bar 86. There is no indicated tempo change, however you can change the character of your tone to differentiate between the sections. The listener is in for quite a shock when you almost double the speed of your eighths. Try to straighten this out.
DEVELOPMENT
Bar 93-111: The rhythmic shape of the main motive in RH is not clear. It is this motive that is being tossed around harmonically and it should be evident that one motive is being used, yet transformed. There are several dynamic changes, play around with these to give more variety of tone.
Bar 107: maybe you are already aware of the mistake: half note in RH is A-flat not G-flat (just in case your edition has a misprint).
Bar 114-115: In the RH you seem to giving accent on the top note of the triads. This is causing you to step on some of your notes. Here and in the following similar passages, it seems you are removing 1 eighth from each phrase. Clap to it and you’ll see what I mean. Start clapping at bar 112 in quarters. By the time you reach the strong down beat of bar 116 you should still be clapping with the music, but since you step on a note somewhere in the middle the clapping is now out of phase with the music. Try playing the RH accenting heavily on every quarter, this may feel strange at first because the linear direction of the triads goes against it, but soon you will feel on which notes the beats land. I know it is very easy to give beats according to the linear direction of what your hands are doing, but it quite often results in uneven music. If you learn how to cope with this one now, and it will improve many of your other pieces too.
Bar 146-153: In the RH, keep your articulations consistent as well as steady the beat.
RECAPITULATION
Bar 167, 169: I would prefer that you kept the original tempo in these bars. The fermata on the whole notes is enough to suggest a rit. Additionally doing a ritard on the descending figure could be a bit too much. This is an interpretational decision however.
Bar 198-199: careful to judge your crescendo here. It sounds like you went subito forte. You could put more of that onto the sF on the next bar.
Bar 234: Similar to bar 73, here it seems you leave out the last eighth in the RH. Don’t squish the trill termination, take your time and shape it.
Bar 248-249: Similar Bar 85-86. There is no indicated tempo change, so eighth note in bar 248 should equal eighth note in bar 249.
Bar 252-258: There are some dynamic contrasts and sforzandos here, you can emphasize them more.
Bar 261-262: Here and similar, it would be nice to feel the RH syncopations more.
Bar 267-281: Here in this cadenza like passage, the rhythm could be a lot more steady. Don’t worry about speed here as much as clarity and evenness. Try to feel the main beats, and this will orient your 16ths.
Bar 291-294: Here the piano is only marked for the fermata note. So it is possible to continue the crescendo for all notes except the fermata note.
Bar 300: It feels as you are not waiting 2 full beats for the rest. This sort of throws off the feeling of chords on the strong beats of the next two bars.
Some general comments:
Make more use of dynamic contrasts and sforzandos.
Try to pick a single tempo that can get you through the entire movement, even if it means slowing the piece down more than your ideal tempo. More speed will come naturally in time, and without much effort on your part as you grasp the technicalities of the piece.