Get the notes and rhythms down well -- "note perfect" Then drop the piece for awhile. Come back and work on "higher" elements, like articulation, dynamics, voicing. The point being your mind will absorb the basic skeleton notes and rhythms and you won't have that clutter in your mind when you focus on those higher elements.Sound good?
Sound good?
Now, this is how I see it. If one has properly done the preparation work for a piece beforehand then he/she will have an idea on how he/she wants the piece to sound.So.. what prevents one to pursue that musical idea? Especially if he/she knows or has been shown the right movements to do so.I think it's best to work everything- notes, rhythm, articulation, dynamics, voising, everything that music is about- all at the same time so as to get at least a rough outline of the musical idea already in one's mind. Then drop it for a while if you must, you might even find that this helps to refine or 'mature' your musical interpretation. Think of a good homemade meat sause (for pasta). After you put everything together you let it simmer a bit so that the flavors and different aromas blend in together and at the end you have this delicious, mouth-watering, finger-licking experience. Working on only notes and rhythm is like putting the ground meat and onions together in the pan, without the garlic, maybe some tomato paste, no spices and then turning off the heat.(guess what I had for dinner tonight )