AJ
I have to laugh -- not at you, but with you!
This piece is such a monster, and I think you're doing well from what I've heard.
I would perhaps say that its difficulty doesn't phase me, but I have a very healthy respect for it. I expect to play it well, but I expect that to take me a very long time to achieve.. Unfortunately I don't have the luxury of practicing 8 hours a day like "the89thkey". I have a non-pianist friend who's been bugging me to learn it since we were about 14-15. I don't think she has even the slightest clue what it means to do so.
I know the Second Concerto and the Paganini Variations though I haven't learned No. 3.
I assume the third is the most difficult although paradoxically Rachmaninoff thought the 2nd was harder and preferred to play the third!
In my scores the 2nd has half as many pages, but the notes within don't look any less demanding. I'll reserve judgement until such time that I have learnt both.. if I choose to do so.
At least for me it is simply exhausting to wade through the jungle of notes that is Rachmaninoff when first trying to learn his works. The melodies are there but literally entwined with the vines and undergrowth of harmonies and dissonances weaving and blooming throughout.
I think this really key, so far I'm feeling that the key difficulty is just the sheer magnitude of the work.. and that it really never lets up on presenting new material even if the themes are similar. Every section has its technical challenges, and while some are no doubt more significant than others that seems kind of trivial comparatively to the idea of the physical and mental stamina required to learn/perform them all as a collective.
But denseness should not imply "heavy", IMHO.
I think lightness and quickness of touch in paramount since much of the piece is full of harmonic "filler" which runs like vines with and around the melodies and counter melodies changing hands, changing moods, and disappearing and reappearing in different areas of the keyboard.
Rachmaninoff was quite at home using the entire keyboard!
I really don't think the concertos CAN be played heavily up to tempo and I think people sometimes think of Rachmaninoff as "heavy".
Maybe it'd be different in a concert hall with a marvelous grand, but on my humble upright (in a small room) anything other than light and you'd overwhelm yourself both physically and aurally. The way its written is perhaps loud harmonically without the notes them selves having to be that way too.
As you said, there is a great deal of harmonic "filler" (don't know if I like the word filler) that has to be played very delicately so as to not drown the melodies.. and once all parts are together (and played quite delicately) the whole instrument is resonating and sending out enough sound to annoy the neighbours 10 houses down (maybe an exaggeration).
Its quite a struggle to balance that against the passion found in the music - ESPECIALLY in the cadenza. It is so firey and it makes you want to play loud and hard, so often where you simply must tone it down or else create a rather giant mess of sound.
How many times have you walked by a practice room somewhere and heard students "slugging" it out with Rach like he was Rocky!
Hahaha, having not spent much (if any) time near a conservatory and having been the only higher grade classical pianist at my highschool I wouldn't know - but I can imagine.
Keep up the good work!
Thanks! and I will do my best.